TL7702A Datasheet, PDF (1/10 Pages) Texas Instruments – SUPPLY-VOLTAGE SUPERVISORS

TL7702A, TL7705A, TL7709A, TL7712A, TL7715A
SUPPLY-VOLTAGE SUPERVISORS
D Power-On Reset Generator
D Automatic Reset Generation After Voltage
Drop
D Wide Supply-Voltage Range
D Precision Voltage Sensor
D Temperature-Compensated Voltage
Reference
D True and Complement Reset Outputs
D Externally Adjustable Pulse Duration
SLVS028E – APRIL 1983 – REVISED JULY 1999
D OR P PACKAGE
(TOP VIEW)
REF 1
RESIN 2
CT 3
GND 4
8 V_CC
7 SENSE
6 RESET
5 RESET
description
The TL77xxA family of integrated-circuit supply-voltage supervisors is specifically 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 V_CC attains a value approaching 3.6 V. At this point (assuming that SENSE is above V_IT+), the delay 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 C_T: t_d = 1.3 × 10⁴ × C_T, where C_T is in farads (F) and t_d is in seconds (s).
During power down (assuming that SENSE is below V_IT–), the outputs remain active until the V_CC falls below
a maximum of 2 V. After this, the outputs are undefined.
An external capacitor (typically 0.1 µF for the TL77xxAC and TL77xxAI) must be connected to REF to reduce
the influence of fast transients in the supply voltage.
The TL77xxAC series is characterized for operation from 0°C to 70°C. The TL77xxAI series is characterized
for operation from –40°C to 85°C.
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP
TA
SMALL
OUTLINE
PLASTIC
DIP
FORM
(Y)
(D)
(P)
0°C to 70°C
TL7702ACD
TL7705ACD
TL7709ACD
TL7712ACD
TL7715ACD
TL7702ACP
TL7705ACP
TL7709ACP
TL7712ACP
TL7715ACP
TL7702ACY
TL7705ACY
TL7709ACY
TL7712ACY
TL7715ACY
TL7702AID TL7702AIP
—
TL7705AID TL7705AIP
—
–40°C to 85°C TL7709AID TL7709AIP
—
TL7712AID TL7712AIP
—
TL7715AID TL7715AIP
—
The D package is available taped and reeled. Add the suffix R to the
device type (e.g., TL7702ACDR). Chip forms are tested at 25°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.
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.
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Copyright © 1999, Texas Instruments Incorporated
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