参数资料
型号: 5962-8868503PA
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, CDIP8
封装: CERAMIC, DIP-8
文件页数: 1/14页
文件大小: 231K
代理商: 5962-8868503PA
TL7702B, TL7705B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Power-On Reset Generator
D Automatic Reset Generation After
Voltage Drop
D RESET Output Defined From VCC ≥ 1 V
D Precision Voltage Sensor
D Temperature-Compensated Voltage
Reference
D True and Complement Reset Outputs
D Externally Adjustable Pulse Duration
description
The TL7702B and TL7705B 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
VCC attains a value approaching 1 V. As VCC
approaches 3 V (assuming that SENSE is above
VT+), 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
CT: td ≈ 2.6 × 104 × CT, where CT is in farads (F)
and td is in seconds (s).
An external capacitor (typically 0.1
F) must be
connected to REF to reduce the influence of fast
transients in the supply voltage.
The TL7702BC and TL7705BC are characterized for operation from 0
°C to 70°C. The TL7702BI and TL7705BI
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
1999, Texas Instruments Incorporated
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.
32 1 20 19
910 11 12 13
4
5
6
7
8
18
17
16
15
14
NC
SENSE
NC
RESET
NC
RESIN
NC
CT
NC
TL7705BM ...FK PACKAGE
(TOP VIEW)
NC
REF
NC
RESET
NC
V
NC
GND
NC
CC
1
2
3
4
8
7
6
5
REF
RESIN
CT
GND
VCC
SENSE
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
VCC
SENSE
RESET
TL7705BM ...U PACKAGE
(TOP VIEW)
NC – No internal connection
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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