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TL7702B

更新时间： 2024-11-22 22:42:11
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德州仪器 - TI /
页数 文件大小 规格书
11页 161K
描述
SUPPLY-VOLTAGE SUPERVISORS

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TL7702B 数据手册

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TL7702B, TL7705B  
SUPPLY-VOLTAGE SUPERVISORS  
SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999  
TL77xxBC . . . D OR P PACKAGE  
TL7705BM . . . JG PACKAGE  
TL7705BQ . . . D PACKAGE  
(TOP VIEW)  
Power-On Reset Generator  
Automatic Reset Generation After  
Voltage Drop  
REF  
RESIN  
CT  
V
CC  
1
2
3
4
8
7
6
5
RESET Output Defined From V  
Precision Voltage Sensor  
≥ 1 V  
CC  
SENSE  
RESET  
RESET  
GND  
Temperature-Compensated Voltage  
Reference  
TL7705BM . . . U PACKAGE  
(TOP VIEW)  
True and Complement Reset Outputs  
Externally Adjustable Pulse Duration  
1
NC •  
NC  
V
SENSE  
RESET  
RESET  
10  
9
2
REF  
RESIN  
CT  
description  
CC  
3
4
5
8
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  
7
GND  
6
NC – No internal connection  
TL7705BM . . . FK PACKAGE  
(TOP VIEW)  
V
attains a value approaching 1 V. As V  
CC  
CC  
approaches 3 V (assuming that SENSE is above  
), the delay timer function activates a time  
V
T+  
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  
3
2 1 20 19  
18  
NC  
NC  
RESIN  
NC  
4
5
6
7
8
SENSE  
NC  
17  
16  
15  
14  
RESET  
NC  
CT  
NC  
9 10 11 12 13  
determined by the value of the external capacitor  
4
C : t ≈ 2.6 × 10 × C , where C is in farads (F)  
T d  
T
T
and t is in seconds (s).  
d
NC – No internal connection  
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 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  
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.  
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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...11

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