TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
The TL7705BM is obsolete
and no longer is supplied.
SLVS037M – SEPTEMBER 1989 – REVISED MAY 2003
Power-On Reset Generator
Temperature-Compensated Voltage
Reference
Automatic Reset Generation After
Voltage Drop
True and Complement Reset Outputs
Externally Adjustable Pulse Duration
RESET Output Defined From V
Precision Voltage Sensor
≥ 1 V
CC
TL77xxBC . . . D OR P PACKAGE
TL7705BM . . . JG PACKAGE
TL7705BQ . . . D PACKAGE
(TOP VIEW)
TL7705BM . . . FK PACKAGE
(TOP VIEW)
TL7705BM . . . U PACKAGE
(TOP VIEW)
1
2
3
4
5
NC
REF
RESIN
CT
NC
V
SENSE
RESET
RESET
10
9
CC
REF
RESIN
CT
V
CC
1
2
3
4
8
7
6
5
3
2 1 20 19
18
8
NC
NC
RESIN
NC
SENSE
RESET
RESET
4
5
6
7
8
7
SENSE
NC
17
16
15
14
GND
6
GND
RESET
NC
CT
NC – No internal connection
NC
9 10 11 12 13
NC – No internal connection
description/ordering information
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) whenV attains a value approaching 1 V. AsV approaches 3 V (assuming that SENSE is aboveV ),
CC
CC
T+
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
4
the value of the external capacitor C : t ≈ 2.6 × 10 × C , where C is in farads (F) and t is in seconds (s).
T d
T
T
d
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 2003, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
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
unless otherwise noted. On all other products, production
testing of all parameters.
processing does not necessarily include testing of all parameters.
1
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