CB-OBS421J-16_技术文档

OBS421 series

Stand-alone dual-mode Bluetooth modules

Electrical Mechanical Data Sheet

Abstract

This document describes the electrical and mechanical data of the

OBS421 stand-alone dual-mode Bluetooth modules. This module is

available in different configurations with internal antenna or a U.FL.

connector for connecting an external antenna.

www.ublox.com

UBX-15016247 - R26

Production Information

OBS421 series - Electrical Mechanical Data Sheet

Document Information

Title

OBS421 series

Subtitle

Stand-alone dual-mode Bluetooth modules

Electrical Mechanical Data Sheet

UBX-15016247

Document type

Document number

Revision and date

Document status

Disclosure restriction

R26

13-Jan-2020

Production Information

u-blox reserves all rights to this document and the information contained herein. Products, names, logos and designs

described herein may in whole or in part be subject to intellectual property rights. Reproduction, use, modification or

disclosure to third parties of this document or any part thereof without the express permission of u-blox is strictly

prohibited.

The information contained herein is provided “as is” and u-blox assumes no liability for the use of the information. No

warranty, either express or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability

and fitness for a particular purpose of the information. This document may be revised by u-blox at any time. For most

u-blox® is a registered trademark of u-blox Holding AG in the EU and other countries. Arm® is the registered trademark of

Arm Limited in the EU and other countries.

UBX-15016247 - R26

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OBS421 series - Electrical Mechanical Data Sheet

Contents

1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Product Variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.1

1.2

1.3

2

Electrical Interface and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1

Pin Numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.1.1

2.1.2

2.2

2.3

2.3.1

2.3.2

2.3.3

J2, J3 and J6 bottom side connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

J8 JST connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Input/Output signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Hardware Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.4

3

4

Operating Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Surface Mounted Antennas (Internal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

External antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1

4.2

4.2.1

4.2.2

4.2.3

Antenna Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Recommended antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Alternative antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5

Mechanics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.1

5.1.1

5.1.2

5.2

5.2.1

5.2.2

5.3

5.3.1

5.3.2

5.4

Module Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Mounting Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Using the J2/J3 Board-to-Board Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Single row connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Double row connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Using the J6 PCB solder pads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Host Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Mounting process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Antenna Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6

Bluetooth Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Bluetooth Qualification information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.1

6.2

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7

Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.1

7.1.1

7.1.2

7.2

7.2.1

7.3

7.4

7.5

7.6

European Union regulatory compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Safety Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

FCC and IC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Compliance for cB-0946 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

UL listing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Japan Radio Equipment Compliance (MIC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

China Radio Transmission Equipment Type Approval (SRRC) . . . . . . . . . . . . . . . . . . . . . . . . 40

NCC Taiwan compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Taiwan NCC certification ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Taiwan NCC Warning Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Taiwan NCC labeling and documentation requirements for end product . . . . . . . . . . . . 41

Compliance with RoHS directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.6.1

7.6.2

7.6.3

7.7

8

9

Guidelines for Efficient and Safe Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Product Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Radio Frequency Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Electronic Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Potentially Explosive Atmospheres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.1

8.2

8.3

8.4

8.5

8.6

Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Step-by-Step Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Design Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.1

9.2

9.2.1

9.2.2

9.2.3

9.2.4

9.2.5

Logic Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

LED and Switch Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

A Complete 5V Host System Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

10

11

Explanation on notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

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OBS421 series - Electrical Mechanical Data Sheet

1 Introduction

The hardware of the cB-OBS421 products are referred as cB-0946 and the module is Type

Approved with the type name cB-0946.

cB-OBS421 is a small size Bluetooth module based on the Texas Instrument CC2564 radio chip

and a ST Microelectronics STM32F10x microprocessor. The module is available as a single mode

(Classic Bluetooth) module and a dual mode (Classic Bluetooth and Bluetooth Low Energy) module.

The module is available in different configurations (see Product Variants) with internal antenna or

a U.FL. connector for connecting an External antenna.

Figure 1: cB-OBS421i-04 OEM Serial Port Adapter with internal antenna

1.1 Related Documents

There are some documents related to the Serial Port Adapter:

The Bluetooth Serial Port Adapter AT Commands document contains a description of the

AT commands supported in the Serial Port Adapter. It also contains information on how to

use the AT commands to create Bluetooth applications.

The cB-OBS421 Electrical Mechanical Data sheet (this document) contains important

information about the OEM Serial Port Adapter. Read this document if you are using the

OEM Serial Port Adapter.

The Bluetooth Qualification Guide contains a step by step guide that describes how to

create a Bluetooth end product listing for products integrating the cB-OBS421.

1.2 Product Variants

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The module is available in three antenna options, two connector options and different software

versions. The main versions are described below, and for each product name there are different

ordering codes to order the module with a specific version of the software. Please note that the j-

version (extra low antenna profile) is available on special request only, since the antenna

performance may be limited because of the small size of the antenna.

Product Regulatory Bluetooth

Description

Ordering

codes and

software

versions

Name

ID

Type

FCC ID

IC ID

MIC ID

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE

(rev B) with internal antenna, board- cB-

v5.3.2:

OBS421i- PVH0946 Bluetooth

24

5325A-

0946

Low Energy

and

to-board and solder pads.

OBS421i-

24-01B

204-

210003

Classic

Bluetooth

v5.2.1:

cB-

OBS421i-

24

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE

(rev B) with internal antenna, JST

v5.3.2:

cB-

OBS421i- PVH0946 Bluetooth

26*

5325A-

0946

204-

Low Energy

and Classic

Bluetooth

wire connector, board-to-board and OBS421i-

solder pads.

26-01B

v5.2.1:

cB-

210003

OBS421i-

26

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE

(rev B) with U.FL. connector for

external antenna, board-to-board

and solder pads.

v5.3.2:

cB-

OBS421x-

24-01B

OBS421x- PVH0946 Bluetooth

24

5325A-

0946

Low Energy

and

204-

210003

Classic

Bluetooth

v5.2.1:

cB-

OBS421x-

24

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE

(rev B) with U.FL. connector for

external antenna, JST wire

connector, board-to-board and

solder pads.

v5.2.1:

cB-

OBS421x-

26

OBS421x- PVH0946 Bluetooth

26*

5325A-

0946

204-

Low Energy

and

Classic

210003

Bluetooth

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE

(rev B) with iAP support, internal

antenna, board-to-board and solder

pads.

v5.1.3 iAP:

Contact us

OBS421i- PVH0946 Bluetooth

i4

5325A-

0946

204-

Low Energy

and

Classic

v5.1.1 iAP:

cB-

OBS421i-i4-

NOTE: Requires Apple MFi

membership. See Bluetooth Serial 01B

Port Adapter Compatibility iPhone,

210003

Bluetooth

v5.0.0 iAP:

cB-

iPad and iPod Ver 2

NOTE: Not for new designs, as MFi OBS421i-i4

approval/certification for new

designs cannot be completed after

July 1, 2019.

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OBS421 series - Electrical Mechanical Data Sheet

Product Regulatory Bluetooth

Description

Ordering

codes and

software

versions

Name

ID

Type

FCC ID

IC ID

MIC ID

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE

(rev B) with iAP support, U.FL.

connector for external antenna,

board-to-board and solder pads.

v5.1.3 iAP:

Contact us

OBS421x- PVH0946 Bluetooth

i4

5325A-

0946

204-

Low Energy

and

Classic

v5.1.1 iAP:

cB-

OBS421x-

NOTE: Requires Apple MFi

membership. See Bluetooth Serial i4-01B

Port Adapter Compatibility iPhone,

210003

Bluetooth

v5.0.0 iAP:

cB-

iPad and iPod Ver 2

NOTE: Not for new designs, as MFi OBS421x-i4

approval/certification for new

designs cannot be completed after

July 1, 2019.

* The JST connector is specified down to -25 ºC. See Environmental for more information.

Table 1a: Active product variants

Product Regulatory Bluetooth

Description

Name

ID

Type

FCC ID

IC ID

MIC ID

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE (rev B) with iAP

support, internal antenna, JST wire connector,

board-to-board and solder pads.

OBS421i- PVH0946 Bluetooth

i6*

5325A-

0946

204-

Low Energy

and

Classic

NOTE: Requires Apple MFi membership. See

Bluetooth Serial Port Adapter Compatibility

iPhone, iPad and iPod Ver 2

210003

Bluetooth

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE (rev B) with iAP

support, U.FL. connector for external antenna,

JST wire connector, board-to-board and solder

pads.

OBS421x- PVH0946 Bluetooth

i6*

5325A-

0946

Low Energy

and

204-

210003

Classic

Bluetooth

NOTE: Requires Apple MFi membership. See

Bluetooth Serial Port Adapter Compatibility

iPhone, iPad and iPod Ver 2

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE with internal

antenna, board-to-board and solder pads.

OBS421i- PVH0946 Bluetooth

14

5325A-

0946

Low Energy

and

204-

210003

Classic

Bluetooth

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE with internal

antenna, JST wire connector, board-to-board

and solder pads.

OBS421i- PVH0946 Bluetooth

16*

5325A-

0946

204-

Low Energy

and Classic

Bluetooth

210003

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OBS421 series - Electrical Mechanical Data Sheet

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE with internal

OBS421j- PVH0946 Bluetooth

14

antenna (extra low antenna profile), board-to-

board and solder pads. Available on special

request only.

5325A-

0946

204-

Low Energy

and Classic

Bluetooth

210003

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE with internal

antenna (extra low antenna profile) with internal

antenna, JST wire connector, board-to-board

and solder pads. Available on special request

only.

OBS421j- PVH0946 Bluetooth

16*

5325A-

0946

204-

Low Energy

and

Classic

210003

Bluetooth

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE with U.FL.

connector for external antenna, board-to-board

and solder pads.

OBS421x- PVH0946 Bluetooth

14

5325A-

0946

Low Energy

and

204-

210003

Classic

Bluetooth

cB-

cB-0946

Dual mode

OEM Serial Port Adapter 421 LE with U.FL.

connector for external antenna, JST wire

connector, board-to-board and solder pads.

OBS421x- PVH0946 Bluetooth

16*

5325A-

0946

Low Energy

and

204-

210003

Classic

Bluetooth

cB-

cB-0946

Single mode OEM Serial Port Adapter 421 with internal

antenna, board-to-board and solder pads.

OBS421i- PVH0946 Classic

04

5325A-

0946

Bluetooth

204-

210003

cB-

cB-0946

Single mode OEM Serial Port Adapter 421 with internal

OBS421i- PVH0946 Classic

06*

antenna, JST wire connector, board-to-board

and solder pads.

5325A-

0946

Bluetooth

204-

210003

cB-

cB-0946

Single mode OEM Serial Port Adapter 421 with internal

OBS421j- PVH0946 Classic

04

antenna (extra low antenna profile), board-to-

board and solder pads. Available on special

request only.

5325A-

0946

Bluetooth

204-

210003

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OBS421 series - Electrical Mechanical Data Sheet

Product Regulatory Bluetooth

Description

Name

ID

Type

FCC ID

IC ID

MIC ID

cB-

cB-0946

Single mode OEM Serial Port Adapter 421 with internal

OBS421j- PVH0946 Classic

06*

antenna (extra low antenna profile) with internal

antenna, JST wire connector, board-to-board

and solder pads. Available on special request

only.

5325A-

0946

204-

Bluetooth

210003

cB-

cB-0946

Single mode OEM Serial Port Adapter 421 with U.FL.

OBS421x- PVH0946 Classic

04

connector for external antenna, board-to-board

and solder pads.

5325A-

0946

Bluetooth

204-

210003

cB-

cB-0946

Single mode OEM Serial Port Adapter 421 with U.FL.

OBS421x- PVH0946 Classic

06*

connector for external antenna, JST wire

connector, board-to-board and solder pads.

5325A-

0946

Bluetooth

204-

210003

* The JST connector is specified down to -25 ºC. See Environmental for more information.

Table 1b: Obsolete product variants

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1.3 Block Diagram

Figure 2: Block diagram of cB-OBS421

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2 Electrical Interface and Connectors

This section describes the signals available on the module interface connectors. There are three

ways to connect to the OEM Serial Port Adapter:

Via the PCB solder pads on the edge of the PCB, J6 (see Figure 3). See Section "Using the J6

PCB solder pads" for more information.

Via the 2x20-pin 1mm pitch board-to-board (one piece part) connectors, J2 through J3. The

J2 to J3 connectors on the OEM Serial Port Adapter exist on the module only as a mating

PCB-layout pattern (see Figure 3). See Section "Using the J2/J3 Board-to-Board Connectors

" for more information.

Optional: Via the JST connector, J8 (see Figure 4). The connector is a 6 poles wire

connector. The pitch is 1mm. The manufacturer of the mounted connector is JST and the

part number is SM06B-SRSS-TB. The SM06B-SRSS-TB connector is mated with the wire

connector SHR-06V-S from JST. Other connector options are also available from JST.

Figure 3: The solder pads J6 are available on the long edges of the bottom side of the PCB. The

board-to-board connector pads J2-J3 are located between the mounting holes.

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Figure 4: The JST connector J8 is mounted on the component sida of the PCB as an option.

2.1 Pin Numbering

2.1.1 J2, J3 and J6 bottom side connectors

Figure 5: Bottom view of the PCB with the pin numbering of the J2, J3 and the J6 connectors.

2.1.2 J8 JST connector

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Figure 6: Top view of the PCB with the pin numbering of the J8 connector.

2.2 Pin Description

J2 J3 J6

Pin Pin Pin

Nbr Nbr Nbr Nbr

J8 Signal

Pin Name

Signal Type

Level

IO Description

Nbr

1- 8,

3,

1

2

-

VSS

Ground

-

GND

2

12 25***

3-

4

-

4

VCC_3V3

-

3.3 V

-

In

-

3.0 - 6.0 VDC power supply

Reserved, do not connect.

5- 5,

14-

10 15- 17,

18 19-

21,

29

-

14 23

13 24

11 26

-

CMOS In/Out

10 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

11 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

12 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

7

6

1

2

27

28

31

32

13 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

14 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

15 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

16 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

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-

3

4

-

33

34

7

-

CMOS In/Out

17 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

-

18 AT command controlled IO pin. See the "Bluetooth Serial

Port Adapter AT Commands" documentation for more info.

11

RED/Mode CMOS Out

2

RED:Logic Red LED Signal (see the Operating Status

section). Active low.

Mode: Not used on cB-OBS421. This pin is also used to

select Logic level mode (instead of RS232) for u-blox

products with internal RS232 driver. To be compatible with

these products check the datasheet for these products

about this signal.

12

-

6

-

Switch-0

CMOS In

1

Used for the "Connect on external signal" function, see the

Serial Port Adapter AT command Specification for more

information on the Function switch. Active low.

A secondary function is that the module will restore all

factory settings if both the Switch-1 and Switch-0 signals

are low during start up.

See the Serial Port Adapter AT command Specification for

more information on the Restoring Default Configuration

functionality.

See section Switch-0 Signal for design examples.

13

-

8

-

GREEN

/Switch-1

CMOS In/Out

3

This signal is multiplexed:

GREEN:Logic Green LED Signal (see the Operating Status

section). Not valid until 500ms after startup. Active low.

Switch-1: If the level on this pin is pulled-down** the unit

goes back to default serial settings. The Switch-1 input is

only active during the first 500ms after startup. The module

will restore all factory settings if both the Switch-1 and

Switch-0 signals are low during start up.

See the Serial Port Adapter AT command Specification for

more information on the Restoring Default Configuration

functionality.

See section GREEN/Switch-1 for design examples.

14

-

9

-

BLUE

CMOS Out

4

Logic Blue LED Signal (see the Operating Status section).

Active low.

Note:Signal will flicker at data transmission.

See section BLUE Signal for design examples.

Clear To Send. Hardware flow control. Active low.

Transmit Data. "0" : Low, "1" : High

15

16

17

18

-

10

11

12

13

5

3

6

4

UART-CTS* CMOS In

UART-TxD* CMOS Out

UART-RTS* CMOS Out

UART-RxD* CMOS In

5

6

7

8

Request To Send. Hardware flow control. Active low.

Receive Data. "0" : Low, "1" : High

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J2 J3 J6

Pin Pin Pin

Nbr Nbr Nbr Nbr

J8 Signal

Pin Name

Signal Type

Level

IO Description

Nbr

19

20

-

5

-

UART-DTR* CMOS Out

UART-DSR* CMOS In

0

9

Data Terminal Ready. Active low.

Data Set Ready. Active low.

18,

30***

-

19 1,

22***

-

CMOS In

Hardware reset

9

36

SerialSelect- CMOS Out /

20 SerialSelect-0: Control signal for external serial transceivers.

0 / IC-SDA

Bidirectional See Appendix Serial Interface section for more info.

Reserved for future alternative use:

IC-SDA: IC Serial data. Used only for enabling of connectivity

to Apple® iOS devices. See Bluetooth Serial Port Adapter

Compatibility iPhone, iPad and iPod for more information.

-

10 35

-

SerialSelect- CMOS Out

1 / IC-SCL

19 SerialSelect-1: Control signal for external serial transceivers.

See Appendix Serial Interface section for more info.

Reserved for future alternative use:

IC-SCL: IC clock. Used only for enabling of connectivity to

Apple® iOS devices. See Bluetooth Serial Port Adapter

Compatibility iPhone, iPad and iPod for more information.

20

2

VCC_2V85 2.85 V Out

-

Regulated interface voltage for voltage level shifting, max

10mA.

* All signals are logic level UART signals (typically 0 - 2.85VDC).

** Use max 4.7kOhm as pull-down which is different to previous product generations from

connectBlue/u-blox.

*** Alternative signal pin recommended to use in new designs (both signal pins should be

connected).

Table 2: Signals description

2.3 Characteristics

The cB-OBS421 module has linear power supplies, which means that the current is constant if the

voltage supply is changed.

2.3.1 Power supply

NOTE

Read the Guidelines for Efficient and Safe Use before using the modules.

The module is equipped with internal linear voltage regulators.

Symbol

Parameter

Value

Unit

VCC_3V3

Power supply (Unregulated*)

Min

3.0

VDC

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Max

6.0

VDC

Table 3: Power supply

A power reduction feature is available, but is not enabled by default. The power reduction feature

can be enable with the command AT*AMWFM (see Bluetooth Serial Port Adapter AT Commands

for information).

VCC_3V3 = 3.3V

Mode

I

Unit

CC

Power reduction Power reduction

disabled (default) enabled

Not connected

Connectable, discoverable

Average 27

Peak 70

Average 0.60

16

mA

58

Not connected, stop mode enabled Not connectable, not

discoverable

0.60

Peak

Average 1.0

Peak 8.5

Average 1.1

Peak 39

Average 29

0.61

1.0

8.5

1.1

39

mA

Connectable, not discoverable

Connectable, discoverable

Idle or Receiving

Connected

18

Peak

123

112

27

Transmitting @115.2kbit/s

Inquiry

Average 44

Peak

133

110

49

Average 57

Peak

133

110

Table 4: Current consumption

2.3.2 Input/Output signals

Symbol

Low

Parameter

Value

Unit

V

Logic LOW level input voltage

Min

-0.50

0.80

V

IN

Max

V

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Symbol

Parameter

Value

Unit

V

High

Logic HIGH level input voltage

Min

2.00

V

IN

Typ

Max

2.85

3.00

3.35

0.40

V

Rev B versions (see Product Variants)

V

Low

Logic LOW level output voltage

Logic HIGH level output voltage

OUT

High

Min

2.40

V

Typ

Max

2.85

3.00

4

V

Rev B versions (see Product Variants)

Sink and source current

V

I

mA

IO

C

I/O pin capacitance

Typ

Min

5

pF

IO

R

30

kOhm

IN_PULL-UP

Input signals (including

Reset pulse length

) internal pull-up

Typ

Max

Min

40

kOhm

ns

50

t

300

Reset

Table 5: Input/output signals

2.3.3 Environmental

Parameter

Model

Value

Unit

°C

Storage temperature

Min

Max

Min

Max

Without JST connector

With JST connector

Without JST connector

With JST connector

Without JST connector

With JST connector

All

-40

-25

°C

+125

+85

-30

°C

Operating temperature

°C

-25

°C

+85

°C

Table 6: Temperatures characteristics

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2.4 Hardware Reset

A hardware

input is available on the J3 and J6 connectors (see Pin Numbering). An external

reset source must be open drain collector, see section Reset for design examples. The

internally pulled-up with 30kOhm. All signal pins are floating in reset state.

pin is

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3 Operating Status

The module can be in different modes (see the Serial Port Adapter AT command Specification for

more information about the modes) and the RED, GREEN and BLUE signals can be used to detect

or indicate the status. The LED signals are active LOW.

Serial Port Adapter Mode

Data mode

Status

RGB LED Color

Green

GREEN GPIO

LOW

BLUE GPIO

HIGH

RED GPIO

HIGH

IDLE

AT mode

IDLE

Orange

Purple

LOW

HIGH

LOW

Data mode, AT mode

CONNECTING*

CONNECTED*

HIGH

LOW

Blue

HIGH

LOW

HIGH

*On data activity the active LEDs flashes and will be HIGH for 50-100ms. For information on how to

suppress the flashes see section BLUE Signal.

Table 7: Signal states in different module modes

DTR signal can be set to indicate an active Bluetooth link. For more information see Serial Port

Adapter AT command Specification.

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4 Antennas

This chapter gives an overview of the different antenna options.

There are 2 different antenna options available:

Internal surface mounted (SMD) antenna.

An U.FL. connector for external antennas. Different types of external antennas are available.

The sections below lists the antennas that are included in the radio type approvals of the module.

For each antenna the "Approvals" field defines in which test reports the antenna is included.

Definitions of the "Approvals" field are:

FCC - The antenna is included in the FCC test reports, and thus approved for use in

countries that accept the FCC radio approvals, primarily US.

IC - The antenna is included in the IC (Industrie Canada) test reports, and thus approved for

use in countries that accept the IC radio approvals, primarily Canada.

RED - The antenna is included in the ETSI test reports, and thus approved for use in

countries that accept the Radio Equipment Directive (RED), primarily the European

countries.

MIC- The antenna is included in the Japanese government affiliated MIC test reports, and

thus approved for use in the Japanese market.

In general, antennas with SMD antenna, Reverse Polarity SMA connector or U.FL connector are

included in FCC, IC, RED and MIC radio tests. Antennas with SMA connector are in general

included in RED and MIC radio tests but not FCC or IC due to FCC/IC regulations.

4.1 Surface Mounted Antennas (Internal)

Part Number

OBS421i

Antenna name

FR05-S1-N-0-102

Manufacture

Gain

Fractus

1 dBi

Antenna size

(LxWxH)

7.0 x 3.0 x 2.0 mm

Comment

The antenna gain is very dependent of the mounting of the module.

See section Antenna Issues for mounting the module considering

the antenna.

Approval

FCC, IC, RED and MIC

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Part Number OBS421j

Antenna

name

FR05-S1-N-0-104

Manufacture Fractus

Gain

0 dBi

Antenna size 7.0 x 3.0 x 1.0 mm

(LxWxH)

Comment

Approval

The antenna gain is very dependent of the mounting of the module.

See section Antenna Issues for mounting the module considering the

antenna. Please note that this version is only available on special

request. The antenna performance is limited because of the small size of

the antenna.

FCC, IC, RED and MIC

4.2 External antennas

The external antennas are connected to the board through a U.FL connector. Some of the

antennas are connected directly to the U.FL connector of the board and some are connected using

an SMA or reversed polarity SMA connector through a short U.FL to SMA or reversed polarity SMA

adapter cable.

Antennas with a part number in the form "cB-ACC-XX" used to be available for orders via the

connectBlue distribution network. Since the acquisition of connectBlue by u-blox antennas can not

be ordered from u-blox. To order antennas please contact the manufacturer or the manufacturer

distribution network. For information about other antennas please contact u-blox.

4.2.1 Antenna Accessories

Part Number

cB-ACC-18 / cB-ACC-48

Name

U.FL to SMA adapter cable

cB-ACC-18 manufacturer part number: K123249002

cB-ACC-48 manufacturer part number: K1994/01

Manufacture/supplier cB-ACC-18: Stig Wahlström

cB-ACC-48: IMS Connector Systems

Connector

U.FL and SMA jack (outer thread and pin receptacle)

120 mm

Cable length

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Part Number

Cable loss

Comment

Approval

cB-ACC-18 / cB-ACC-48

Less than 0.5dB

The SMA connector may be mounted in a panel.

RED and MIC

Part Number

cB-ACC-38

Name

U.FL to reverse polarity SMA adapter cable

Manufacturer part number: K123743001

Manufacture

/supplier

Stig Wahlström

Connector

Cable length

Cable loss

Comment

U.FL and reverse polarity SMA jack (outer thread and pin)

120 mm

Less than 0.5dB

The reverse polarity SMA connector may be mounted in a

panel.

Approval

FCC, IC, RED and MIC

4.2.2 Recommended antennas

Part Number cB-ACC-61

Name

Ex-IT 2400 RP-SMA 28-001

Manufacture ProAnt

Polarization Vertical

Gain

+3.0 dBi

Size

Ø 12.0 x 28.0 mm

Connector

Comment

Reverse Polarity SMA plug (inner thread and pin receptacle)

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Part Number cB-ACC-61

To be mounted on the U.FL to Reverse Polarity SMA adapter cable (cB-ACC-38).

An SMA version antenna is also available but not recommended to use (Ex-IT 2400 SMA

28-001).

Approval

FCC, IC, RED and MIC

Part Number

cB-ACC-63

Name

Ex-IT 2400 MHF 28

Manufacture

Polarization

Gain

ProAnt

Vertical

+2.0 dBi

Size

Ø 12.0 x 28.0 mm

Cable length

Connector

Comment

Approval

100 mm

U.FL. connector

To be mounted on the U.FL connector on the PCB.

FCC, IC, RED and MIC

Part Number cB-ACC-64

Name

Ex-IT 2400 RP-SMA 70-002

Manufacture ProAnt

Polarization Vertical

Gain

+3.0 dBi

Size

Ø 10 x 83 mm

Connector

Reverse Polarity SMA plug (inner thread and pin receptacle)

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Part Number cB-ACC-64

Comment

To be mounted on the U.FL to Reverse Polarity SMA adapter cable

(cB-ACC-38).

An SMA version antenna is also available but not recommended to

use (Ex-IT 2400 SMA 70-002).

Approval

FCC, IC, RED and MIC

Part Number cB-ACC-60

Name

Ex-IT 2400 MHF 70-001

Manufacture ProAnt

Polarization

Gain

Vertical

+3.0 dBi

Size

Ø 9.4 x 70.5 mm

Cable length 100 mm

Connector

Comment

Approval

U.FL. connector

To be mounted on the U.FL connector on the PCB.

FCC, IC, RED and MIC

Part Number

cB-ACC-57

Name

InSide-2400

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Part Number

cB-ACC-57

Manufacture

Gain

ProAnt

+3.0 dBi

Size

27 x 12 mm (triangular)

100 mm

Cable length

Connector

Comment

Approval

U.FL. connector

To be mounted on the U.FL connector on the PCB.

FCC, IC, RED and MIC

Part Number

cB-ACC-66

Name

FlatWhip-2400

Manufacture

Gain

ProAnt

+3.0 dBi

Size

Ø 50.0 x 30.0 mm

Connector

Comment

Approval

SMA plug (inner thread and pin)

To be mounted on the U.FL to SMA adapter cable.

RED and MIC

Part Number

cB-ACC-67

Name

Outside-2400

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Part Number

cB-ACC-67

Manufacture

Gain

ProAnt

+3.0 dBi

Size

36.0 x 18.0 x 16.0 mm

70 mm

Cable length

Connector

Comment

Approval

U.FL. connector

To be mounted on the U.FL connector on the PCB.

FCC, IC, RED and MIC

4.2.3 Alternative antennas

The alternative antennas are available for backward compability but not recommended for new

designs.

Part Number cB-ACC-16 / cB-ACC-36

Name

WCR2400-SMA / WCR2400-SMRP

Manufacture Laird Technologies/ Centurion

Polarization Vertical

Gain

Size

+2.0 dBi

100 mm (Straight)

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Part Number cB-ACC-16 / cB-ACC-36

Connector

cB-ACC-16: SMA plug (inner thread and pin)

cB-ACC-36: Reverse Polarity SMA plug (inner thread and

pin receptacle)

Comment

cB-ACC-16 is to be used together with the U.FL to SMA

adapter cable (cB-ACC-18 or cB-ACC-48).

cB-ACC-36 is to be used together with the U.FL to

Reverse Polarity SMA adapter cable (cB-ACC-38).

Approval

cB-ACC-36: FCC, IC, RED and MIC

cB-ACC-16: RED and MIC

Part Number

cB-ACC-27 / cB-ACC-29

Name

WCR-2400-IP04 / WCR-2400-IP10

Manufacture

Polarization

Gain

Laird Technologies/ Centurion

Vertical

+2.0 dBi

Size

108 mm (Straight)

Cable length

cB-ACC-27: 100 mm

cB-ACC-29: 250 mm

Connector

Comment

Approval

U.FL. connector

To be mounted on the U.FL connector on the PCB.

FCC, IC, RED and MIC.

Part Number cB-ACC-23

Name

PSTG0-2400HS

Manufacture Mobile Mark Communications Antennas

Polarization

Vertical

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OBS421 series - Electrical Mechanical Data Sheet

Part Number cB-ACC-23

Gain

0 dBi

Size

Ø 9.5 x 26 mm

Connector

Comment

SMA plug (inner thread and pin)

To be used together with the U.FL to SMA adapter cable (cB-ACC-18 or cB-ACC-48).

An alternative Reverse Polarity SMA version antenna is available (PSTG0-2400HRS).

Approval

RED and MIC

Part Number

cB-ACC-28

Name

NanoBlue-IP04

Manufacture

Polarization

Gain

Laird

Linear

+2.0 dBi

Size

47.8 x 12.7 x 0.9 mm

Cable length

Connector

Comment

Approval

100 mm

U.FL. connector

To be mounted on the U.FL connector on the PCB.

FCC, IC, RED and MIC

Part Number cB-ACC-17 / cB-ACC-37

Name Reel planTec Bluetooth m70

Manufacture REEL

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Part Number cB-ACC-17 / cB-ACC-37

Gain

+1.0 dBi

Size

Ø 75 x 20 mm

M16 x 13.6 mm

Mounting

Connector

cB-ACC-17: SMA plug (inner thread and pin)

cB-ACC-37: Reverse Polarity SMA plug (inner thread and pin

receptacle)

Cable length 300 cm. Other cable lengths are available on request.

Comment

cB-ACC-17 is to be used together with the U.FL to SMA adapter cable

(cB-ACC-18 or cB-ACC-48).

cB-ACC-37 is to be used together with the U.FL to Reverse Polarity

SMA adapter cable (cB-ACC-38).

Approval

cB-ACC-37: FCC, IC, RED and MIC.

cB-ACC-17: RED and MIC.

Part Number cB-ACC-21

Name R380.500.127

Manufacture Pulse

Polarization

Gain

Vertical

+2.0 dBi

Size

Ø 14.3 x 61.4 mm

SMA plug (inner thread and pin)

Connector

Comment

To be mounted on the U.FL to SMA adapter cable (cB-ACC-18 or cB-ACC-48).

A Reverse Polarity SMA version is also available (R380.500.125).

Approval

RED and MIC

Part Number —

Name

R380.500.139

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OBS421 series - Electrical Mechanical Data Sheet

Part Number —

Manufacture Pulse

Polarization Vertical

Gain

+2.0 dBi

Size

Ø 14.3 x 61.1 mm

Connector

Comment

Reverse Polarity SMA plug (inner thread and pin receptacle)

The difference compared to the R380.500.125 antenna is that the R380.500.139 antenna

has a seal ring.

To be mounted on the U.FL to Reverse Polarity SMA adapter cable (cB-ACC-38).

An SMA version antenna is also available (R380.500.124).

Approval

FCC, IC, RED and MIC

Part Number

—

Name

IHF-242

Manufacture

Polarization

Gain

Joymax

Vertical

+2.0 dBi

Size

Ø 9.2 x 82.5 mm

150 cm

Cable length

Connector

MCX male connector

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Part Number

Comment

Approval

—

To be mounted on a MCX to U.FL adapeter cable.

FCC, IC, RED and MIC

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OBS421 series - Electrical Mechanical Data Sheet

5 Mechanics

5.1 Module Outlines

5.1.1 Dimensions

Figure 7: cB-OBS421 dimensions [mm].

The J2 pads are longer to fit both the single and double row ASP connectors (see section Using the

J2/J3 Board-to-Board Connectors).

Weight: 2 g

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5.1.2 Mounting Holes

There are 2 x 2.3mm mounting holes on the cB-OBS421 module. The reasons for the 2.3mm holes

are that the threaded M2 holes on the single and double row connectors (see section Suitable One-

Piece Part Connectors) are not aligned. The outer tangents of the 2.3mm holes align the module if

the single row connectors are used and the inner if double row connectors are used (see Figure 8).

Figure 8: The 2.3mm mounting holes [mm].

5.2 Using the J2/J3 Board-to-Board Connectors

The board-to-board connector should be a 1mm pitch one-piece part connector. The

recommended manufacture is Samtec.

The Electrical Interface and Connectors section contains more information about the connector

and the electrical interface.

5.2.1 Single row connectors

The single row connector SEI-120-02 can be used but is not recommended for new designs.

5.2.2 Double row connectors

This connector has a height of 3.0mm and this has to be considered if components are to be

mounted on the motherboard under the OEM Serial Port Adapter board. There are alignment pins

on the bottom side of the connector.

The connector is available with M2 threaded inserts that fit the mounting holes on the board (see

section Mounting Holes). If you want to have a tighter and more secure mounting you may use

longer screws and secure it using a nut on the backside of the motherboard.

Samtec order

number

Quote

number

Equivalent part

Package Remark

REF-120018-01

REF-120018-02

55392

FSI-120-03-G-D-M-AB

Tube

With M2 threaded inserts and align pin on bottom

side only

FSI-120-03-G-D-M-AB-K- Tape-n-

TR Reel

With M2 threaded inserts and align pin on bottom

side only

Table 9: Double row connectors from Samtec

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NOTE

For technical questions regarding the Samtec connectors please contact u-blox or

Samtec at (Scandinavia@samtec.com).

See Figure 10 for more information about the connector and necessary measurements on the

motherboard.

Figure 10: Host PCB layout [mm] for double row connector.

5.3 Using the J6 PCB solder pads

5.3.1 Host Board

The host PCB footprint should not contain any traces or vias under the module except the pads

interfacing the J6 pads to avoid contact with traces/vias on the module. The host pads which are

soldered to the J6 pads should match the J6 pads but could be extended 0.5-1.0mm outside the

module for visual solder inspection. No other pads than the J6 should be soldered to the host PCB.

See section J2, J3 and J6 Connectors for more info about the J6 pads.

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5.3.2 Mounting process

We strongly recommend the modules not being soldered more than 1 time after shipping from u-

blox and that the modules are mounted just before the host product is being soldered the last

time. Although, u-blox devices will withstand up to two reflows to an absolute maximum

temperature of 250°C.

The PCB in our modules is made of FR4-type with Chemical Gold Pads.

The modules are produced in a lead-free process with a lead-free soldering paste.

It is recommended that the customers make their own electrical, climate, stress and

vibration tests on the final assembled product to secure that the manufacturing process

hasn't damaged or affected the Bluetooth module in any way.

The device recommended maximum re-flow temperature is 245°C for 10 sec.

The device absolute maximum re-flow temperature is 250°C for 3 sec.

Modules of type OEM Serial Port Adapter 421 LE (rev B) (see Note 3):

Each module has a label with serial number in 2D barcode format. The label

withstands the re-flow and baking process. NOTE that this label type applies only to

the rev B version of the OBS421 (see Note 3). Labels on the other product variants are

NOT heat resistant.

Modules of type OEM Serial Port Adapter 421 LE (see Note 2) and type OEM Serial Port

Adapter 421 (see Note 1 ):

Each module packaged in ESD-bag has a label with serial number in human readable

format and product name in human readable format. The label does NOT withstand

the re-flow or baking process.

Modules packaged on tape-and-reel or tray are delivered without labels on each

module (unless otherwise specified) since the label does not withstand the re-flow or

baking process.

5.4 Antenna Issues

The unit cannot be mounted arbitrary, because of the radio communication. The unit with an

internal surface mounted antenna (cB-OBS421i) cannot be mounted in a metal enclosure. No

metal casing or plastics using metal flakes should be used, avoid also metallic based paint or

lacquer. Keep a minimum clearance of 5 mm between the antenna and the casing. Keep minimum

10 mm free space from metal around the antenna including under and above. If a metal enclosure

is required, one of the external antenna options has to be used. See Surface Mounted Antenna

(Internal) for more information on the antenna options available.

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6 Bluetooth Information

6.1 General information

In the tables below you can find information about Bluetooth properties.

Parameter

OBS421 without low energy support

OBS421 with low energy support

(Note 1)

(Note 2 and Note 3)

Bluetooth radio

Texas Instrument CC2564

Host micro controller

ST Microelectronics STM32F10x

RF output power - Classic

Bluetooth

Class 1, Max 10 dBm + antenna gain (See Class 1, Max 10 dBm + antenna gain (See

Antennas)

RF output power - Bluetooth low

energy

Not applicable

Max 5 dBm + antenna gain (See Antennas

)

Receive sensitive level - Classic

Bluetooth

-90dBm - antenna gain (See Antennas).

-91dBm - antenna gain (See Antennas).

Receive sensitive level - Bluetooth Not applicable

low energy

Output frequency

Bluetooth stack

2.402 - 2.480 GHz, ISM band

u-blox Embedded Bluetooth Stack 2.0

4.0

u-blox Embedded Bluetooth Stack

2.1 + EDR

Bluetooth qualification

Table 10: Bluetooth information cB-OBS421

6.2 Bluetooth Qualification information

All products based on the PCB cB-0946 have been qualified according to the Bluetooth

specification. OBS421 module versions without low energy support (Note 1) are qualified

according to Bluetooth specification v2.1+EDR. OBS421 module versions with low energy support (

Note 2 and Note 3) are qualified according to Bluetooth specification v4.0.

For information how to List and Declare your product see the Bluetooth Qualification Guide.

The following Bluetooth profiles are supported (covered functionality):

Classic Bluetooth technology:

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Generic Access Profile (GAP)

Service Discovery Application Profile (SDAP)

Serial Port Profile (SPP)

Dial-up Networking Profile (DUN GW, DUN DT)

Personal Area Network Profile (PAN PANU, PAN NAP)

Bluetooth low energy technology (applicable only for OBS421 with low energy support - Note 2 and

Note 3):

Generic Access Profile (GAP)

Generic Attribute Profile (GATT)

Device Information Service (DIS)

u-blox Low Energy Serial Port Service

The Bluetooth SIG's "Go To Market Toolkit" guides you through four key steps for success when

going to market with a Bluetooth enabled product: https://www.bluetooth.org/en-us/bluetooth-

brand/go-to-market-toolkit

The Bluetooth SIG has decided to withdraw the Bluetooth specification v2.1+EDR on July

1, 2020 and Bluetooth specification v4.0 on February 1, 2022. This means that from

those respective dates, it is not possible to create new Bluetooth Declarations for end

products based on that Bluetooth version (such as products using the OBS421 series

modules). End products with Bluetooth Declarations completed before those respective

withdrawal dates are not affected, but after those dates, it is not possible to make any

changes to those Bluetooth Declarations. For more information see https://www.

bluetooth.com/specifications/archived-specifications/

The Bluetooth Declaration of the end product is mandatory for members of the Bluetooth

SIG. It is mandatory to be a member of the Bluetooth SIG to be allowed to use the

Bluetooth brand logo or brand name.

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7 Regulatory Information

7.1 European Union regulatory compliance

7.1.1 Declaration of Conformity

Information about the regulatory compliance of the European Union for OBS421 is available in the

OBS421 Declaration of Conformity (UBX-15014547) available at www.u-blox.com.

7.1.2 Safety Compliance

In order to fulfill the safety standard EN 60950-1 the unit must be supplied by a limited power

source.

7.2 FCC and IC Compliance

See the Product Variants section for information about the different product variants.

7.2.1 Compliance for cB-0946

FCC Statement for cB-0946

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two

conditions:

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including interference that may cause

undesired operation.

NOTE

This equipment has been tested and found to comply with the limits for a Class B digital

device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide

reasonable protection against harmful interference in a residential installation. This

equipment generates, uses and can radiate radio frequency energy and, if not installed

and used in accordance with the instructions, may cause harmful interference to radio

communications. However, there is no guarantee that interference will not occur in a

particular installation. If this equipment does cause harmful interference to radio or

television reception, which can be determined by turning the equipment off and on, the

user is encouraged to try to correct the interference by one or more of the following

measures:

Reorient or relocate the receiving antenna

Increase the separation between the equipment and receiver

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Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected

Consult the dealer or an experienced radio/TV technician for help.

Antenna

Our module type cB-0946 is for OEM integrations only. The end-user product will be professionally

installed in such a manner that only the authorized antennas are used.

Caution

Any changes or modifications NOT explicitly APPROVED by u-blox could cause the module to cease

to comply with FCC rules part 15, and thus void the user's authority to operate the equipment.

IC Compliance

Operation is subject to the following two conditions:

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including interference that may cause

undesired operation.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio

exempts de licence. L'exploitation est autorisée aux deux conditions suivantes:

(1) l'appareil ne doit pas produire de brouillage, et

(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage

est susceptible d'en compromettre le fonctionnement.

This device has been designed to operate with an antenna having a maximum gain of 3.5 dBi.

Having a higher gain is strictly prohibited per regulations of Industry Canada. The required

antenna impedance is 50 ohms.

To reduce potential radio interference to other users, the antenna type and its gain should be so

chosen that the equivalent isotropically radiated power (EIRP) is not more than that required for

successful communication.

The installer of this radio equipment must ensure that the antenna is located or pointed such that

it does not emit RF field in excess of Health Canada limits for the general population; consult

Safety Code 6, obtainable from Health Canada's website www.hc-sc.gc.ca/rpb

Labeling Requirements for End Product

For an end product using the product cB-0946 there must be a label containing, at least, the

following information:

This device contains

FCC ID: PVH0946

IC: 5325A-0946

The label must be affixed on an exterior surface of the end product such that it will be visible upon

inspection in compliance with the modular approval guidelines developed by the FCC.

In accordance with 47 CFR § 15.19 the end product shall bear the following statement in a

conspicuous location on the device:

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"This device complies with Part 15 of the FCC Rules.

Operation is subject to the following two conditions;

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including interference that may cause

undesired operation."

When the device is so small or for such use that it is not practicable to place the statement above

on it, the information shall be placed in a prominent location in the instruction manual or pamphlet

supplied to the user or, alternatively, shall be placed on the container in which the device is

marketed. However, the FCC ID label must be displayed on the device.

In case, where the final product will be installed in locations where the end-user is not able to see

the FCC ID and/or this statement, the FCC ID and the statement shall also be included in the end-

product manual.

7.3 UL listing information

If a customer intends to UL list a product including any of the Bluetooth modules based on the PCB

cB-0946 this information is useful:

The printed circuit board if produced according to the following specification:

UL recognized ZPMV2 min. 105 °C flame class V-0 or better.

7.4 Japan Radio Equipment Compliance (MIC)

The cB-0946 module with the product name cB-OBS421 complies with the Japanese Technical

Regulation Conformity Certification of Specified Radio Equipment (ordinance of MPT N°. 37,

1981), Article 2, Paragraph 1, Item 19, "2.4GHz band wide band low power data communication

system". The cB-0946 MIC certification number is 204-210003.

When a product is placed on the Japanese market, the cB-OBS421 module product must be

affixed with the following Specified Radio Equipment marking:

The minimum size of the logo is Ø3.0mm. The end product holder should also include a copy of the

Japan Radio Certificate to the end product technical documentation. Contact support@u-blox.

com for a copy of the Radio Certificate.

The end product is recommended to be marked with:

7.5 China Radio Transmission Equipment Type Approval (SRRC)

In accordance with the provisions on the Radio Regulations of the People's Republic of China, the

cB-0946 module with the product name OBS421i conforms to the provisions with it's CMIIT ID:

2015DJ1181.

Please note that the following requirements apply for end products that are sold to China:

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Label with CMIIT ID number of the module is required to be placed on the end product.

The following statement in Chinese must be on the end product and included in the Chinese

user manual:

(This device contains certified RF module which certificate number is CMIIT ID:

2015DJ1181)

7.6 NCC Taiwan compliance

Module variant cB-OBS421i-24 has been certified for NCC, Taiwan. Contact u-blox for further

information about the certification, and the requirements for utilizing the certification for an end

product. Please note that other variants have not been certified for NCC, Taiwan.

7.6.1 Taiwan NCC certification ID

Certifcation ID for cB-OBS421i-24 is CCAI19LP0690T1.

7.6.2 Taiwan NCC Warning Statement

Statement translation:

Without permission granted by the NCC, any company, enterprise, or user is not allowed to

change frequency, enhance transmitting power or alter original characteristic as well as

performance to approved low power radio-frequency devices.

The low power radio-frequency devices shall not influence aircraft security and interfere

legal communications; If found, the user shall cease operating immediately until no

interference is achieved. The said legal communications means radio communications is

operated in compliance with the Telecommunications Act. The low power radio-frequency

devices must be susceptible with the interference from legal communications or ISM radio

wave radiated devices.

7.6.3 Taiwan NCC labeling and documentation requirements for end product

Please contact u-blox for further information.

7.7 Compliance with RoHS directive

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All products based on the PCB cB-0946 are produced according to the RoHS (Restriction of the

use of certain Hazardous substances in electrical and electronic equipment) directive and

complies with the directive.

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8 Guidelines for Efficient and Safe Use

8.1 General

Read this information before using your OEM Serial Port Adapter.

For any exceptions, due to national requirements or limitations, when using your OEM Serial Port

Adapter, please visit www.bluetooth.org.

NOTE

Changes or modifications to the product not expressly approved by u-blox will void the

user's authority to operate the equipment.

8.2 Product Care

Do not expose your product to liquid or moisture.

Do not expose you product to extreme hot or cold temperature (see section Environmental

for further information).

Do not expose your product to lit candles, cigarettes, cigars, open flames, etc.

Do not drop, throw or try to bend your product since rough treatment could damage your

product.

Do not attempt to disassemble your product. Doing so will void warranty. The product does

not contain consumer serviceable or replaceable components. Service should only be

performed by u-blox.

Do not paint your product as the paint could prevent normal use.

If you will not be using your product for a while, store it in a place that is dry, free from damp,

dust and extreme heat and cold.

The clearance and creepage distances required by the end product must be withheld when

the module is installed.

The cooling of the end product shall not negatively be influenced by the installation of the

module when the module is installed.

8.3 Radio Frequency Exposure

The OEM Serial Port Adapter contains a small radio transmitter and receiver. During

communication with other Bluetooth products the OEM Serial Port Adapter receives and

transmits radio frequency (RF) electromagnetic fields (microwaves) in the frequency range 2400

to 2500 MHz. The output power of the radio transmitter is very low.

When using the OEM Serial Port Adapter, you will be exposed to some of the transmitted RF

energy. This exposure is well below the prescribed limits in all national and international RF safety

standards and regulations.

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8.4 Electronic Equipment

Most modern electronic equipment, for example, in hospitals and cars, is shielded from RF energy.

However, certain electronic equipment is not. Therefore:

NOTE

This equipment emits RF energy in the ISM (Industrial, Scientific, Medical) band. Please

insure that all medical devices used in proximity to this device meet appropriate

susceptibility specifications for this type of RF energy.

8.5 Potentially Explosive Atmospheres

Turn off your electronic device before entering an area with potentially explosive atmosphere. It is

rare, but your electronic device could generate sparks. Sparks in such areas could cause an

explosion or fire resulting in bodily injury or even death.

Areas with a potentially explosive atmosphere are often, but not always, clearly marked. They

include fuelling areas, such as petrol station, below deck on boats, fuel or chemical transfer or

storage facilities, and areas where the air contains chemicals or particles, such as grain, dust, or

metal powders.

8.6 Power Supply

The OEM Serial Port Adapter must be supplied by a limited power source according to EN 60950-1.

Connect your power supply only to designated power-sources as marked on the product.

Make sure all cords and cable are positioned so that they will not be stepped on, tripped over

or otherwise subject to damage or stress.

To reduce risk of electric shock, unplug the unit from any power source before attempting to

clean it.

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9 Application Notes

Usually only a subset of the available functionality is of interest to the designer. In addition,

depending on the host system, the electrical interface can be designed in many ways. The

designer can use the step-by-step guide in this chapter as an aid in the design process.

9.1 Step-by-Step Guide

Question

Yes

No

Are you going to integrate the OEM

Serial Port Adapter in a metal

enclosure?

Use one of the OEM Serial Ports Adapters with Go on to next point.

antenna connector for external antenna (cB-

OBS421x).

Do you wish to use logic level when

communicating with the OEM Serial design.

Port Adapter?

See section Logic level Mode for electrical

See section External RS232 driver

and External RS422 driver for

electrical design.

Do you want to use RS232 as the

physical serial interface?

See section External RS232 driver for

electrical design.

Go on to next point.

Do you wish to connect LEDs to the

OEM Serial Port Adapter?

See section LED and Switch Design for design Go on to next point.

examples for connecting the LEDs.

Do you want to detect the status of

the module with a controller?

See section Operating Status for status

detection and section LED and Switch Design

for electrical design.

Go on to next point.

Do you wish to utilize the restore

switch?

See section GREEN/Switch-1 for electrical

design.

Go on to next point.

Do you wish to utilize the Function

switch ("Connect on external

signal")?

See section Switch-0 Signal for electrical

design.

Do you want to manually reset the

module?

See section Reset for electrical design. Use a

double row connector. See section Double row

connectors.

Table 12: Step-by-step guide with Yes and No answers.

9.2 Design Examples

This section contains design examples for all interfaces on J2, J3, and J6. The connector type that

suits a specific application depends on the needed signal and the preferred interface type (board-

to-board or SMD).

9.2.1 Logic Levels

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3.0/3.3 voltage host system

A 3.0/3.3V host system can be connected directly to the logic level pins (BLUE, UART-TxD / UART-

RxD etc). A serial 100Ohm resistor shall be used (see Figure 12) for protection, see the

Characteristics section for logic levels characteristics.

5 voltage host system

A 5V host system can easily be adjusted to the logic levels.

Module input signals in a 5V host system

The module input signals can use a resistive divider (1.8kOhm/2.2kOhm) to adjust the levels (See

Figure 12). This is applicable for speeds up to 115.2kBits/s. The divider can be improved by adding

a logic buffer (74HCT08) for higher speeds (see Figure 13). The resistor dividers consume current

and a better solution could be to use the 5V input tolerant gates in the LVC family. The LVC gates

are available in singel, dual and quad gates packages (e.g. 74LVC1G08, 74LVC2G08 and

74LVC08). The LVC gates need to be power supplied with the module signal voltage levels (see

Input/Output signals). The VCC_2V85 pin (see the Pin Description section) can be used for

suppling the interface circuits. Notice that the VCC_2V85 output voltage supply is not available on

all u-blox modules, e.g. if the application is designed to be used with different pin compatible u-blox

modules.

The LVC gates could maybe also be used for output signals if the host input signals are TTL

compatible (V

= 2V). LVC gate can not be used on 5V CMOS input signals.

IN_HIGH_MIN

Module output signals in a 5V host system

The module output pins could require a buffer (see Figure 13) depending on the logic level

requirements (see the Characteristics section). HCT gates supplied with 5V can be used in a 5V

host system with TTL or CMOS inputs (see Figure 13). LVC gates can maybe be used for output

signals if the host input signals are TTL compatible (V

= 2V). LVC gate can not be used

IN_HIGH_MIN

on 5V CMOS host input signals.

The 74HCT08 gate is also available in a single and dual gate package (74AHCT1G08 and

74AHCT2G08).

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Figure 12: Logic levels interface to a 3/3.3V system. A protective 100Ohm resistor is used.

Figure 13: Interface example with logic levels to a 5V system. The gate converting from host 5V

output to module input can be repleced with an LVC gate if the voltage divider is removed.

A 5V system with open collector outputs is designed in Figure 14.

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Figure 14: Open collector outputs.

9.2.2 Serial Interface

The serial interface of the module is Logic Level logic levels and the module can be connected to an

external µController (see section Logic level Mode).

An external driver is needed if the module should be on another physical interface like RS232 (see

section External RS232 driver - External RS422 driver).

CTS (Clear To Send) and RTS (Request To Send) are used for hardware flow control.

DSR (Data Set Ready) can be used to make a connect attempt. See the Serial Port Adapter AT

commands specification.

DTR (Data Terminal Ready) can be used to detect if the module is up and running and ready to

receive data.

NOTE

The module must be configured to flow control none if hardware flow control is not used,

see the Serial Port Adapter AT Commands specification.

Logic level Mode

The serial UART interface can be used in a host controller application with a UART interface. The

design of the interface depends on the power supply voltage of the host system; see the Logic

Levels section for voltage translation.

External RS232 driver

An external RS232 driver is needed if the module should have a RS232 serial interface. See Figure

15 for a complete design example that could be connected to the serial port of standard PC. Not

used functionality can be left unconnected; see section Serial Interface.

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Figure 15: A complete RS232 interface.

External RS422 driver

An external RS422 driver could be used in a point-to-point (full duplex) application (see Figure 16).

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Figure 16: A complete RS422 interface.

External RS422/RS485 transceiver

A complete RS422/RS485 transceiver design connected to a bus system need to control the

enable signals of the transceiver. The SerialSelect signals are used for this purpose (see Table 13).

The module need to be software configured to the corrected interface, see the Serial Port Adapter

AT Commands document how to configure the module to the correct serial interface. The Red

/Mode pin is not allowed to be pull-down when using the SerialSelect signals (see the Pin

Description section).

SerialSelect- SerialSelect- RS485/RS422 Transmitter status (Active

RS485/RS422 Receiver status (Active

low)

0

1

0

1

0

1

high)

Disabled

Enabled

Disabled

Enabled

Disabled

Table 13: SerialSelect signals combinations

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Figure 17: A complete RS422/RS485 transceiver design.

9.2.3 LED and Switch Design

BLUE Signal

The BLUE logic LED signal is not multiplexed with any other functionality, which makes the design

more straightforward (see Figure 18). There are two important notes:

A blue LED requires about 3.5V forward voltage drop (cannot be used in a 3.3V system).

The BLUE signal can be used to detect if the module is connected or not. The BLUE signal

flashes when the module is sending and receiving data (see section Operating Status). See

Figure 19 for an example on how to suppress the flashes.

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Figure 18: A blue LED can be connected directly to the module if the LED current is below 4mA. A

high state (active low) makes the voltage drop over the LED to 2.2V. This is not enough to light

the LED.

Figure 19: A Low pass filter and a 74HC08 suppresses the flashes when the module is sending

and receiving data. The Blue LED can be removed if not required. The values are not suitable in all

applications and need to be verified in a specific application.

RED/Mode Signal

The RED logic LED signal is not multiplexed with any other functionality. See Figure 20 for a 3.3V

design.

In a 5V system the high state output from the module is not enough to turn off the LED so a

74HCT08 buffer can be used to raise the high level to 5V (see Figure 21).

The 74HCT08 gate is available in a single and dual gates package (74AHCT1G08 and

74AHCT2G08).

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Figure 20: A red LED in a 3.3V host system. The status of the signal can also be used as input to

a host controller.

Figure 21: A red LED in a 5V host system. The status of the signal can also be used as input to a

host controller.

The RED signal pin is also used to select Logic Level mode (instead of RS232) for u-blox products

with internal RS232 driver e.g. cB-OEMSPA312. The mode functionality is not applicable on cB-

OBS421 because there is no internal RS232 driver available. To be compatible with these products

check this signal in their Electrical and Mechanical datasheet.

GREEN/Switch-1 signal

The GREEN/Switch-1 signal is a multiplexed signal:

GREEN - Logic green LED signal (see the Operating status section). Becomes valid after the

module has started up. The startup time can be up to 2 seconds (see the Serial Port Adapter

AT Commands specification).

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Switch-1 - The module reads the status of the signal at startup to decide if the serial

interface settings shall be restored (LOW). The module will restore all factory settings if

both the Switch-1 and Switch-0 signals are low during start up. See the Serial Port Adapter

AT Commands specification for more details. The input signal must be stable for the first

500ms after startup (after reset/power on reset).

The signal is internally pulled-up (see Input/Output signals) to the internal voltage supply (see

Power supply) for NOT restoring settings to default values.

NOTE

The internal pull-up is changed compared to previous product generations from u-blox.

See the Migrating from Bluetooth cB-OEMSPA3xx to cB-OBS4xx products section for

more information.

If a LED is used and a switch is required to be able to restore the settings, a high impendence

buffer need to prevent the signal from being pulled-up via the LED. See Figure 22-23 and the Logic

Levels section for buffer selection.

Sometimes, over time, switch contacts can get an oxide layer. This may cause the closed switch

resistance to become too high to sink the signal to logic LOW because the signal is internally

pulled-up (seeInput/Output signals). A design that prevents this can be found in Figure 27.

Figure 22: Switch-1 used together with a green LED in a 3.3V host system. The status of the

signal can also be used as input to a host controller. Notice the 1kOhm serial resistor.

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Figure 23: Switch-1 used together with a green LED in a 5V host system. The status of the signal

can also be used as input to a host controller. Notice the 1kOhm serial resistor.

The buffer can be removed in a 3.3V system if no restore switch is required (see Figure 24).

In a 5V system the high state output from the module is not enough to turn off the LED, so a

74HCT08 buffer can be used to raise the high level to 5V (see Figure 25).

The 74HCT08 gate is also available in a single gate package (74AHCT1G08).

Figure 24: No restore switch used but a green LED in a 3.3V host system. The status of the signal

can also be used as input to a host controller.

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Figure 25: No restore switch used but a green LED in a 5V host system. The status of the signal

can also be used as input to a host controller.

A serial resistor to the restore switch must be used to prevent a short circuit when the GREEN

/Switch-1 pin is in output HIGH state and the switch is pressed (see Figure 26).

Sometimes, over time, switch contacts can get an oxide layer. This may cause the closed switch

resistance to become too high to sink the signal to logic LOW because the signal is internally

pulled-up (see Input/Output signals). A design that prevents this can be found in Figure 27. The

GREEN/Switch-1 pin can be left unconnected if none of its functionality is required.

Figure 26: A low resistance restore switch used. Notice the 1kOhm serial resistor.

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Figure 27: If the resistance in the switch is not guaranteed to be low enough, a safer design can

be used. Notice the 1kOhm serial resistor.

Switch-0 Signal

Switch-0 is used for the external connect function. A secondary function is that the module will

restore all factory settings if both the Switch-1 and Switch-0 signals are low during start up. See

the Serial Port Adapter AT Commands specification for more details.

Sometimes, over time, switch contacts can get an oxide layer. This may cause the closed switch

resistance to become too high to sink the signal to logic LOW because the signal is internally

pulled-up (see Input/Output signals). A design that prevents this can be found in Figure 29.

\

Figure 28: A low resistance function switch used.

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Figure 29: If the resistance in the switch is not guaranteed to be low enough, a safer design can

be used.

The Switch-0 pin can be left unconnected if its functionality is not used.

9.2.4 Reset

The Reset-n pin could be sensitive to ESD discharge but the sensitivity can be decreased by

adding a a pull-up resistor and a shunt capacitor (e.g. see the design examples below), the values

depends on the host design and need to be optimized for each application.

The Reset-n pin can be connected to an external reset source, see Figure 30 for a switch example.

If the reset signal is connected to an output signal it must be an open drain collector, see Figure

31.

The Reset-n pin can be left unconnected if not used.

Figure 30: A reset switch.

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Figure 31: Design of an open collector reset from an active high output.

9.2.5 A Complete 5V Host System Interface

Figure 32 is a complete 5V host system interface example with an RGB LED and two switches

(except the serial interface, see section Serial Interface for information). The design is based on

the LM339 Quad OP-amp instead of logic gates.

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Figure 32: A complete 5V host interface with operational amplifier.

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10 Explanation on notes

Note 1:

Modules without Bluetooth low energy support are:

OBS421i-04

OBS421j-04

OBS421x-04

OBS421i-06

OBS421j-06

OBS421x-06

OBS421i-A? (where ? is any digit)

OBS421j-A? (where ? is any digit)

OBS421x-A? (where ? is any digit)

Note 2:

Modules with Bluetooth low energy support (that can be enabled by configurations command),

module revision A are:

OBS421i-14

OBS421j-14

OBS421x-14

OBS421i-16

OBS421j-16

OBS421x-16

OBS421i-B? (where ? is any digit)

OBS421j-B? (where ? is any digit)

OBS421x-B? (where ? is any digit)

Note 3:

Modules with Bluetooth low energy support (that can be enabled by configuration command),

module revision B are:

OBS421i-24

OBS421x-24

OBS421i-i4

OBS421x-i4

OBS421i-26

OBS421x-26

OBS421i-i6

OBS421x-i6

OBS421i-C? (where ? is any digit)

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OBS421x-C? (where ? is any digit)

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11 Revision history

Revision Date Comments

R25

30-

Replaced "R&TTE" by "RED" to reflect the terminology of the Radio Equipment Directive (RED). Replaced

Jan- "TELEC" by "MIC" to reflect the updated terminology of the Japan country certification. Added information

2019 about ordering codes for different software versions (table 1).

R26

13-

Added note about withdrawal of Bluetooth specification v2.1+EDR and v4.0 (section Bluetooth

Jan- Qualification information). Added note to the iAP product variants that they are not for new designs

2020 (section Product Variants). Added information about NCC Taiwan approval for module variant OBS421i-

24.

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Contact

For complete contact information visit us at www.u-blox.com

North, Central and South America

Headquarters Europe, Middle East, Africa

Asia, Australia, Pacific

u-blox America, Inc.

u-blox AG

u-blox Singapore Pte. Ltd.

Phone: +65 6734 3811

E-mail: info_ap@u-blox.com

Support: support_ap@u-blox.com

Phone: +1 703 483 3180

E-mail: info_us@u-blox.com

Phone: +41 44 722 74 44

E-mail: info@u-blox.com

Support: support@u-blox.com

Regional Office West Coast:

Phone: +1 408 573 3640

E-mail: info_us@u-blox.com

Regional Office Australia:

Phone: +61 2 8448 2016

E-mail: info_anz@u-blox.com

Support: support_ap@u-blox.com

Technical Support:

Phone: +1 703 483 3185

E-mail: support_us@u-blox.com

Regional Office China (Beijing):

Phone: +86 10 6813 3545

E-mail: info_cn@u-blox.com

Support: support_cn@u-blox.com

Regional Office China (Chongqing):

Phone: +86 23 6815 1588

E-mail: info_cn@u-blox.com

Support: support_cn@u-blox.com

Regional Office China (Shanghai):

Phone: +86 21 6090 4832

E-mail: info_cn@u-blox.com

Support: support_cn@u-blox.com

Regional Office China (Shenzhen):

Phone: +86 755 8627 1083

E-mail: info_cn@u-blox.com

Support: support_cn@u-blox.com

Regional Office India:

Phone: +91 959 1302 450

E-mail: info_in@u-blox.com

Support: support_in@u-blox.com

Regional Office Japan (Osaka):

Phone: +81 6 6941 3660

E-mail: info_jp@u-blox.com

Support: support_jp@u-blox.com

Regional Office Japan (Tokyo):

Phone: +81 3 5775 3850

E-mail: info_jp@u-blox.com

Support: support_jp@u-blox.com

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Regional Office Korea:

Phone: +82 2 542 0861

E-mail: info_kr@u-blox.com

Support: support_kr@u-blox.com

Regional Office Taiwan:

Phone: +886 2 2657 1090

E-mail: info_tw@u-blox.com

Support: support_tw@u-blox.com

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型号：	CB-OBS421J-16
厂家：	u-blox AG
描述：	Telecom IC,
文件：	总65页 (文件大小：1782K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CB-OBS421J-16 [U-BLOX]

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