R5105N521C-TR-F [RICOH]

Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO6, ROHS COMPLIANT, SOT-23, 6 PIN;


型号：	R5105N521C-TR-F
厂家：	RICOH ELECTRONICS DEVICES DIVISION
描述：	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO6, ROHS COMPLIANT, SOT-23, 6 PIN 光电二极管
文件：	总2页 (文件大小：248K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

R5105N Series

Compact Watchdog Timer with VD

The R5105N Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single

chip. R5105N monitors the power system of devices equipped with microprocessors and prevents system runaway with a reset

signal when a malfunction occurs. The output delay time of the VD and watchdog timeout period/reset time can be adjusted high

accuracy with an external capacitor.

FEATURES

• Supply Current (ISS) ························Typ. 11μA (VDD=-VDET+0.5V,

Clock pulse input)

• Operating Voltage Range (VDD) ······0.9V to 6.0V

(VD Section)

• Output Delay Time (tPLH)················· Typ. 370ms (CD=0.1μF)

• Output Delay Time Accuracy·········· ± 16% (-40°C Topt 105°C)

(WDT Section)

• Watchdog Timeout Period (tWD)······ Typ. 310ms (CTW=0.1μF)

•

Detector Threshold Range (-VDET

Detector Threshold Accuracy ··········± 1%

Temp. coeff. of Detector Threshold ···Typ. ± 100ppm/°C

)

···1.5V to 5.5V (internally fixed)

• Reset Hold Time of WDT (tWR) ······· Typ. 34ms (CTW=0.1μF)

•

Watchdog Timeout Period Accuracy···· ± 33% (-40°C Topt 105°C)

• Package ········································· SOT-23-6

(The above shows specification at Topt=25 C. Design assurance value at -40 C

Topt

105 C is also available. For details, please refer to the datasheet.)

BLOCK DIAGRAMS

TYPICAL APPLICATION

R5105Nxx1A

R5105Nxx1C

(Nch. open drain output)

(CMOS output)

Power Supply

Microprocessor

VDD

V^DD

C^D

V^DD

RESETB

R5105Nxx1A

RESET

I/O

Vref2

Vref1

GND

SCK

GND

SCK

C^TW

Series

SCK

WATCHDOG

TIMER

CLOCK

DETECTOR

WATCHDOG

TIMER

CLOCK

DETECTOR

C^TW

GND

CTW

RESETB

SELECTION GUIDE

xx.

: Specify the detector threshold within the range 1.5V (

in 0.1V steps.

)

to 5.5V

)

Package

Quantity per Reel

Part No.

SOT-23-6

3,000 pcs

R5105N

xx.

∗-TR-F

: Select the output type from (

) Nch. open drain or (

) CMOS.

∗

PACKAGE (Top View)

TIMING CHART

SOT-23-6

+V^DET

-VDET

tPHL

+V^TCD

-VTCD

tWD

tWDI

Vref2H

SCK

CTW

VDD

Watchdog timer clock input pin

CTW

Ext. Cap. pin for setting reset and

watchdog timeout period of WDT

Power supply pin

V^ref2L

RESETB Output pin for Reset "L" signal

tPLH

GND

Ground pin

SCK

Ext. Cap. pin for setting output

delay time of VD

tWR

RESETB

APPLICATION

∗tPHL : Output delay time

∗t^WDI: tWD/10 (SCK pulses input during this period are ignored.)

• Monitoring of the power system of devices equipped with microprocessors

No.EK-159-091101

CMOS Microprocessor Supervisory

1.The products and the product speciﬁcations described in this document are subject to change or

discontinuation of production without notice for reasons such as improvement. Therefore, before

deciding to use the products, please refer to Ricoh sales representatives for the latest

information thereon.

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described herein.

4.The technical information described in this document shows typical characteristics of and

example application circuits for the products. The release of such information is not to be

construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual

property rights or any other rights.

5.The products listed in this document are intended and designed for use as general electronic

components in standard applications (oﬃce equipment, telecommunication equipment,

measuring instruments, consumer electronic products, amusement equipment etc.). Those

customers intending to use a product in an application requiring extreme quality and reliability,

for example, in a highly speciﬁc application where the failure or misoperation of the product

could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system,

traﬃc control system, automotive and transportation equipment, combustion equipment, safety

devices, life support system etc.) should ﬁrst contact us.

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semiconductor products are likely to fail with certain probability. In order to prevent any injury to

persons or damages to property resulting from such failure, customers should be careful enough

to incorporate safety measures in their design, such as redundancy feature, ﬁrecontainment

feature and fail-safe feature. We do not assume any liability or responsibility for any loss or

damage arising from misuse or inappropriate use of the products.

7.Anti-radiation design is not implemented in the products described in this document.

8.Please contact Ricoh sales representatives should you have any questions or comments

concerning the products or the technical information.

RICOH COMPANY., LTD. Electronic Devices Company

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■

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http://www.ricoh.com/LSI/

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Electronic Devices Company

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