TPS3813J25, TPS3813L30, TPS3813K33, TPS3813I50

PROCESSOR SUPERVISORY CIRCUITS WITH WINDOW-WATCHDOG

SLVS331A – DECEMBER 2000 – REVISED APRIL 2001

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POST OFFICE BOX 655303

features

Delay and Window Ratio

Delay Time of 25 ms

3.3 V, 5 V

typical applications

or Microprocessors

features

description

The TPS3813 family of supervisory circuits pro-

vides circuit initialization and timing supervision,

primarily for DSPs and processor-based systems.

During power on, RESET is asserted when supply

internal voltage divider.

For safety critical applications the TPS3813 family incorporates a so-called window-watchdog with

programmable delay and window ratio. The upper limit of the watchdog time-out can be set by either connecting

assert a RESET.

typical operating circuit

WDR

RESET

WDT

WDI

VDD

GND

CWP

VDD

R

RESET

I/O

GND

0.1

µF

VDD

TPS3813

uC

0.1

µF

Copyright

 2001, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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(TOP VIEW)

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WDI

GND

WDT

RESET

VDD

TPS3813

DBV PACKAGE

WDR

5

ACTUAL SIZE

3,00 mm x 3,00 mm