TL7702B, TL7705B

SUPPLY-VOLTAGE SUPERVISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

1

POST OFFICE BOX 655303

Voltage Drop

Reference

description

The TL7702B and TL7705B are integrated-circuit

supply-voltage supervisors designed for use as

reset

controllers

in

microcomputer

and

microprocessor systems. The supply-voltage

supervisor monitors the supply for undervoltage

conditions at the SENSE input. During power up,

the RESET output becomes active (low) when

approaches 3 V (assuming that SENSE is above

delay, after which outputs RESET and RESET go

inactive (high and low, respectively). When an

undervoltage condition occurs during normal

operation, outputs RESET and RESET go active.

To ensure that a complete reset occurs, the reset

outputs remain active for a time delay after the

voltage at the SENSE input exceeds the

positive-going threshold value. The time delay is

determined by the value of the external capacitor

An external capacitor (typically 0.1

µF) must be

connected to REF to reduce the influence of fast

transients in the supply voltage.

The TL7702BC and TL7705BC are characterized for operation from 0

°C to 70°C. The TL7702BI and TL7705BI

are characterized for operation from –40

°C to 85°C. The TL7705BQ is characterized for operation from –40°C

to 125

°C. The TL7705BM is characterized for operation from –55°C to 125°C.

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.

Copyright

© 1999, 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.

32 1 20 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

NC

SENSE

NC

RESET

NC

NC

RESIN

NC

CT

NC

TL7705BM ...FK PACKAGE

(TOP VIEW)

1

2

3

4

8

7

6

5

REF

RESIN

CT

GND

SENSE

RESET

RESET

TL77xxBC ...D OR P PACKAGE

TL7705BM . . . JG PACKAGE

TL7705BQ ...D PACKAGE

(TOP VIEW)

1

2

3

4

5

10

9

8

7

6

NC

REF

RESIN

CT

GND

NC

SENSE

RESET

RESET

TL7705BM ...U PACKAGE

(TOP VIEW)

•

NC – No internal connection

NC – No internal connection

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.