R5109G381A-TR-F [RICOH]

Power Supply Management Circuit, Adjustable, 1 Channel, CMOS, PDSO8, LEAD FREE, SSOP-8;


型号：	R5109G381A-TR-F
厂家：	RICOH ELECTRONICS DEVICES DIVISION
描述：	Power Supply Management Circuit, Adjustable, 1 Channel, CMOS, PDSO8, LEAD FREE, SSOP-8 光电二极管电源管理电路电源电路
文件：	总2页 (文件大小：286K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

R5109G Series

Watchdog Timer Equipped with 2-Clock Monitoring with VD

The R5109G Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single chip.

R5109G 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 with an external capacitor

with a high degree of accuracy. R5109G is equipped with the function that inhibits clock monitoring of the WDT (INH) and the function to

supervise two different clocks.

FEATURES

• Supply Current (ISS) ························Typ. 11.5μA (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 ·········································SSOP-8G

•

(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

R5109Gxx1A

R5109Gxx1C

(Nch. open drain output)

(CMOS output)

Power Supply

Microprocessor 1

V^DD

VDD

V^DD

INH

RESETB

SCK1

RESET

I/O

R5109Gxx1A

Series

Vref2

Vref1

Vref2

Vref1

SCK2

C^TW

Microprocessor 2

V^DD

GND

CTW

GND

WATCHDOG

TIMER

CLOCK

WATCHDOG

TIMER

CLOCK

CTW

SCK1

SCK2

SCK1

SCK2

DETECTOR

C^D

RESET

I/O

CLOCK

DETECTOR

CLOCK

DETECTOR

RESETB

INH

SELECTION GUIDE

Specify the detector threshold within the range 1.5V (

in 0.1V steps.

) to 5.5V (

)

Package

Quantity per Reel

3,000 pcs

Part No.

SSOP-8G

R5109G

xx.

∗-TR-F

: Select the output type from (

) Nch. open drain or (

) CMOS.

∗

PACKAGE (Top View)

TIMING CHART

SSOP-8G

_DD+V^DET

-VDET

7 6 5

INH

PHL

tPHL

+VTCD

^CD-VTCD

RESETB Output pin for Reset "L" signal

tWDI

tWD

INH

Inhibit pin

ref2H

VCTW

Ext. Cap. pin for setting output

delay time of VD

ref2L

GND

SCK1

SCK2

Ground pin

Watchdog timer clock input pin 1

Watchdog timer clock input pin 2

Ext. Cap. pin for setting reset and

watchdog timeout period of WDT

Power supply pin

SCK1

CTW

VDD

VSCK2

PLH

tWR

PLH

tPLH

VRESETB

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-172-091101

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.

2.The materials in this document may not be copied or otherwise reproduced in whole or in part

without prior written consent of Ricoh.

3.Please be sure to take any necessary formalities under relevant laws or regulations before

exporting or otherwise taking out of your country the products or the technical information

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.

6.We are making our continuous eﬀort to improve the quality and reliability of our products, but

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

■Ricoh awarded ISO 14001 certification.

■

Ricoh presented with the Japan Management Quality Award for 1999.

The Ricoh Group was awarded ISO 14001 certification, which is an international standard for

environmental management systems, at both its domestic and overseas production facilities.

Our current aim is to obtain ISO 14001 certification for all of our business offices.

Ricoh continually strives to promote customer satisfaction, and shares the achievements

of its management quality improvement program with people and society.

Ricoh completed the organization of the Lead-free production for all of our products.

After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that

will be shipped from now on comply with RoHS Directive.

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

RICOH COMPANY, LTD.

Electronic Devices Company

● Shin-Yokohama oﬃce (International Sales)

3-2-3, Shin-Yokohama, Kohoku-ku, Yokohama City, Kanagawa 222-8530, Japan

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RICOH COMPANY, LTD.

Electronic Devices Company

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Room109, 10F-1, No.51, Hengyang Rd., Taipei City, Taiwan (R.O.C.)

Phone: +886-2-2313-1621/1622 Fax: +886-2-2313-1623

R5109G381A-TR-F [RICOH]

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