ECLAMP2122S.TCT [SEMTECH]

Data Line Filter, 1 Function(s), 5.25V, 6 Pin(s), Plastic, HALOGEN FREE AND ROHS COMPLIANT, JEDEC SOT-23 6L, 6 PIN;


型号：	ECLAMP2122S.TCT
厂家：	SEMTECH CORPORATION
描述：	Data Line Filter, 1 Function(s), 5.25V, 6 Pin(s), Plastic, HALOGEN FREE AND ROHS COMPLIANT, JEDEC SOT-23 6L, 6 PIN LTE 电视
文件：	总7页 (文件大小：223K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

EClamp2122S

USB Downstream Port Filter & TVS

For EMI Filtering and ESD Protection

PROTECTION PRODUCTS - EMIClamp^®

Features

Description

The EClamp^®2122S is combination EMI filter and line

termination device with integrated TVS diodes for use

on USB 2.0 interfaces. This device utilizes solid-state

silicon-avalanche technology for superior clamping

performance and DC electrical characteristics. They

have been optimized for protection of USB inter-

faces in cellular phones and other portable electron-

ics.

EMI/RFI filtering and line termination with inte-

grated ESD protection

ESD protection for USB power (V_BUS) and data lines

(D+ & D-) to IIEC 61000-4-2 (ESD), ±25kV (air),

±20kV (contact)

Filtering and termination for two USB data lines

Series resistors for impedance matching

Integrated pull down resistors as required by the

USB specification for downstream ports

Low TVS operating voltage (5.25V)

Solid-state technology

USB line termination is achieved with a series 22Ω

resistor on both the D+ and D- USB lines. These

resistors preserve signal integrity by matching the cable

impedance to that of the differential driver. The 15kΩ

pull-down resistors complete the termination circuit on

each line. They are required by the USB specification

to identify the line as a downstream connection. The

capacitors are used to bypass high frequency energy to

ground and for edge rate control of the USB signals.

Integrated TVS diodes provide ESD protection of both

(D+ & D-) data lines and the voltage bus (V_BUS). The

TVS diodes provide effective suppression of ESD

voltages in excess of 25kV (air discharge) and 20kV

(contact discharge) per IEC 61000-4-2.

Mechanical Characteristics

JEDEC SOT-23 6L package

Pb-Free, Halogen Free, RoHS/WEEE Compliant

Nominal Dimensions: 2.9 x 2.8mm

Molding compound flammability rating: UL 94V-0

Marking: Marking Code + Date Code

Packaging: Tape and Reel

Applications

USB 1.1 Interfaces

USB Hubs

Printers

Monitors

The EClamp2122S is in a 6-pin SOT-23 package. The

leads are finished with lead-free matte tin. It is suit-

able for use in USB hubs, computers, peripherals, and

portable devices

Servers, Desktop, and Notebook computers

Circuit Diagram

Pin Configuration

(Top Side View)

www.semtech.com

Revision 1/24/2011

EClamp2122S

PROTECTION PRODUCTS

Absolute Maximum Rating

Rating

Symbol

P_SS

Value

Units

Steady-State Power

100

ESD Air Discharge per IEC 61000-4-2

ESD Contact Discharge per IEC 61000-4-2

V_ESD

Operating Temperature

Storage Temperature

T_J

-40 to +85

°C

T_STG

-55 to +150

Electrical Characteristics (T = 25^oC)

Parameter

Symbol

V_RWM

V_BR

Conditions

Minimum

Typical

Maximum

Units

TVS Reverse Stand-Off Voltage

TVS Reverse Breakdown Voltage

Series Resistance

5.25

I_t= 1mA

Each Line

R_S

16.5

Pulldown Resistance

R_PD

13.5

kΩ

TVS Diode Capacitance

Each Line

V_R= 0V, f = 1MHz

Total Capacitance

C_TOT

Between Input or Output

to Ground

V_R= 0V, f = 1MHz

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EClamp2122S

PROTECTION PRODUCTS

Typical Characteristics

ESD Clamping (Pin 1 to GND)

(8kV Contact per IEC 61000-4-2)

(-8kV Contact per IEC 61000-4-2)

ESD Clamping (Pin 4 or 5 to GND)

(8kV Contact per IEC 61000-4-2)

ESD Clamping (Pin 4 or 5 to GND)

(-8kV Contact per IEC 61000-4-2)

Note: ESD data is taken with a 20dB attenuator

www.semtech.com

EClamp2122S

PROTECTION PRODUCTS

Typical Insertion Loss S21

(Pin 2 to 5 with respect to GND)

Typical Insertion Loss S21

(Pin 3 to 4 with respect to GND)

Frequency S21 (dB)

114.9MHz

800MHz

900MHz

1.8GHz

2.5GHz

2.7GHz

-3.00

-14.11

-11.62

-5.16

-3.55

-3.52

114.6MHz

800MHz

900MHz

1.8GHz

2.5GHz

2.7GHz

-3.00

-12.58

-10.40

-4.76

-3.30

-3.38

Normalized Junction Capacitance

vs. Reverse Voltage (Data Pins)

1.5

1.4

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

f = 1 MHz

Reverse Voltage - V_R(V)

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EClamp2122S

PROTECTION PRODUCTS

Applications Information

Device Connection

Figure 1 - EClamp2122S Circuit Diagram

The EClamp2122S is designed to provide termination,

EMI filtering and ESD protection for two USB I/O lines.

The equivalent circuit diagram is shown in Figure 1.

The device is connected as follows:

USB data lines are routed through the

EClamp2122S for easy implementation and opti-

mum pc board layout. Pin 1 is connected to the

voltage supply line. The input of the D+ line is

routed into pin 2 and out of pin 5. The input of the

D- line is connected at pin 3 and the output at pin

4. Pin 6 is connected to ground. The ground

connection should be made directly to the ground

plane for best results. The path length is kept as

short as possible to reduce the effects of parasitic

inductance in the board traces.

USB Port Design with EClamp2122S

The Universal Serial Bus (USB) specification requires

termination and filtering components for proper opera-

tion. In addition, an open USB socket is vulnerable to

hazardous ESD discharges in excess of 15kV. These

discharges can occur on the data lines or the voltage

bus. The EClamp2122S is an easily implemented

solution designed to meet the termination & EMI filter

requirements of the USB specification revision 1.1. It

also provides ESD protection to IEC 61000-4-2.

USB line termination is achieved with series resistors

on both the D+ and D- lines. These resistors preserve

signal integrity by matching the cable impedance to

that of the differential driver. 15kΩ pull-down resis-

tors are used to identify a downstream port. Capaci-

tors are used to bypass high frequency energy to

ground and for edge rate control of the USB signals.

Integrated TVS diodes provide ESD protection of both

(D+ & D-) data lines and the voltage bus (V_BUS).

General layout guidelines are given below:

Avoid running D+ & D- signal line traces near high

speed clock lines or similar signal lines.

Avoid running critical signal lines near board edges.

Place the EClamp2122S near the USB connector

to restrict transient coupling.

Minimize the path length between the USB connec-

tor and the EClamp2122S.

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EClamp2122S

PROTECTION PRODUCTS

Outline Drawing - SOT-23 6L

DIMENSIONS

INCHES MILLIMETERS

DIM

MIN NOM MAX MIN NOM MAX

.057 0.90

.006 0.00

1.45

0.15

.035

.000

A2 .035 .045 .051 .90 1.15 1.30

.010

.003

.020 0.25

.009 0.08

0.50

0.22

E/2

.110 .114 .122 2.80 2.90 3.10

E1 .060 .063 .069 1.50 1.60 1.75

.110 BSC

.037 BSC

.075 BSC

2.80 BSC

0.95 BSC

1.90 BSC

ccc

2X N/2 TIPS

.012 .018 .024 0.30 0.45 0.60

(.024)

.004

.008

(0.60)

0.10

0.20

aaa

bbb

ccc

0°

10°

0°

10°

aaa

SEATING

PLANE

bxN

bbb

GAGE

PLANE

A-B D

0.25

(L1)

DETAIL A

SEE DETAIL A

SIDE VIEW

NOTES:

1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H-

DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS

OR GATE BURRS.

Land Pattern - SOT-23 6L

(C)

DIMENSIONS

DIM

INCHES

(.098)

.055

MILLIMETERS

(2.50)

1.40

0.95

0.60

1.10

3.60

.037

.024

.043

.141

NOTES:

1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.

CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR

COMPANY'S MANUFACTURING GUIDELINES ARE MET.

www.semtech.com

EClamp2122S

PROTECTION PRODUCTS

Marking

Ordering Information

Qty per

Reel

Size

Part Number

EClamp2122S.TCT

3,000

7 Inch

212

Note: Lead finish is lead-free matte tin

EMIClamp and EClamp are trademarks of Semtech Corporation

YW = 2 - Alphanumeric characters for Date Code

Tape and Reel Specification

User Direction of feed

Device Orientation in Tape

3.23 +/-0.05 mm

3.17 +/-0.05 mm

1.37 +/-0.05 mm

Tape

(MAX)

B, (Max)

Width

T(MAX)

8.0 mm

+ 0.3 mm

- 0.1 mm

1.0 mm

±0.05

1.750±.10

4.2 mm

8 mm

1.5 + 0.1 mm

- 0.0 mm

3.5±0.05

4.0±0.1

2.0±0.05

2.4 mm

0.4 mm

(.165)

Contact Information

Semtech Corporation

Protection Products Division

200 Flynn Rd., Camarillo, CA 93012

Phone: (805)498-2111 FAX (805)498-3804

www.semtech.com

ECLAMP2122S.TCT [SEMTECH]

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