TL7702B, TL7705B, TL7733B

SUPPLY-VOLTAGE SUPERVISORS

SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002

1

POST OFFICE BOX 655303

Voltage Drop

Reference

description

The TL7702B, TL7705B, and TL7733B 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

timer function activates a time 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, TL7705BC, and TL7733BC are characterized for operation from 0

°C to 70°C. The TL7702BI,

TL7705BI, and TL7733BI 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

 2002, Texas Instruments Incorporated

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

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.