TLC7701 Datasheet, PDF (1/19 Pages) Texas Instruments – MICROPOWER SUPPLY VOLTAGE SUPERVISORS

TLC7701, TLC7725, TLC7703, TLC7733, TLC7705
MICROPOWER SUPPLY VOLTAGE SUPERVISORS
D Power-On Reset Generator
D Automatic Reset Generation After
Voltage Drop
D Precision Voltage Sensor
D Temperature-Compensated Voltage
Reference
D Programmable Delay Time by External
Capacitor
D Supply Voltage Range . . . 2 V to 6 V
D Defined RESET Output from V_DD ≥ 1 V
D Power-Down Control Support for Static
RAM With Battery Backup
D Maximum Supply Current of 16 µA
D Power Saving Totem-Pole Outputs
D Temperature Range . . . – 40°C to 125°C
SLVS087K – DECEMBER 1994 – REVISED JULY 1999
D, JG, P OR PW PACKAGE
(TOP VIEW)
CONTROL 1
RESIN 2
CT 3
GND 4
8 V_DD
7 SENSE
6 RESET
5 RESET
NC
CONTROL
RESIN
CT
GND
U PACKAGE
(TOP VIEW)
1
10
2
9
3
8
4
7
5
6
NC
V_DD
SENSE
RESET
RESET
description
The TLC77xx family of micropower supply voltage
supervisors provide reset control, primarily in
microcomputer and microprocessor systems.
FK PACKAGE
(TOP VIEW)
During power-on, RESET is asserted when V_DD
reaches 1 V. After minimum V_DD (≥ 2 V) is
established, the circuit monitors SENSE voltage
and keeps the reset outputs active as long as
SENSE voltage (V_I(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, t_d, is determined by
an external capacitor:
t_d = 2.1 × 10⁴ × C_T
Where
C_T is in farads
t_d is in seconds
NC
RESIN
NC
CT
NC
3 2 1 20 19
4
18
5
17
6
16
7
15
8
14
9 10 11 12 13
NC
SENSE
NC
RESET
NC
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, t_d, has expired.
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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