1

2

3

4

8

7

6

5

CONTROL

RESIN

CT

GND

VDD

SENSE

RESET

RESET

D OR PW PACKAGE

(TOP VIEW)

TLC7701-EP, TLC7705-EP, TLC7733-EP

www.ti.com

SGLS013E

– MARCH 2003 – REVISED NOVEMBER 2011

MICROPOWER SUPPLY VOLTAGE SUPERVISORS

Check for Samples: TLC7701-EP, TLC7705-EP, TLC7733-EP

1

FEATURES

SUPPORTS DEFENSE, AEROSPACE,

AND MEDICAL APPLICATIONS

•

Power-On Reset Generator

•

Controlled Baseline

•

Automatic Reset Generation After Voltage

Drop

•

One Assembly/Test Site

•

Precision Voltage Sensor

•

One Fabrication Site

•

Temperature-Compensated Voltage Reference

•

Available in Extended (

–40°C/125°C

and

–55°C/125°C), Temperature Ranges(1)

•

Programmable Delay Time by External

Capacitor

•

Extended Product Life Cycle

•

Supply Voltage Range . . . 2 V to 6 V

•

Extended Product-Change Notification

•

Defined RESET Output from VDD ≥ 1 V

•

Product Traceability

•

Power-Down Control Support for Static RAM

With Battery Backup

•

Maximum Supply Current of 16 mA

•

Power Saving Totem-Pole Outputs

(1)

Additional temperature ranges available - contact factory

DESCRIPTION

The TLC77xx family of micropower supply voltage supervisors provide reset control, primarily in microcomputer

and microprocessor systems.

During power-on, RESET is asserted when VDD reaches 1 V. After minimum VDD (≥ 2 V) is established, the

circuit monitors SENSE voltage and keeps the reset outputs active as long as SENSE voltage (VI(SENSE)) remains

below the threshold voltage. An internal timer delays return of the output to the inactive state to ensure proper

system reset. The delay time (td) is determined by an external capacitor:

td = 2.1 × 10

4 × C

T

(1)

Where

CT is in farads

td is in seconds

Except for the TLC7701, which can be customized with two external resistors, each supervisor has a fixed sense

threshold voltage set by an internal voltage divider. When SENSE voltage drops below the threshold voltage, the

outputs become active and stay in that state until SENSE voltage returns above threshold voltage and the delay

time (td) has expired.

1

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.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2003–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.