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TL7702-705-733B PDF预览

TL7702-705-733B

更新时间： 2024-11-21 22:42:11
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德州仪器 - TI /
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9页 140K
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SUPPLY-VOLTAGE SUPERVISORS

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TL7702-705-733B 数据手册

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TL7702B, TL7705B, TL7733B  
SUPPLY-VOLTAGE SUPERVISORS  
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002  
TL77xxBC . . . D OR P PACKAGE  
TL7705BM . . . JG PACKAGE  
TL7705BQ . . . D PACKAGE  
(TOP VIEW)  
Power-On Reset Generator  
Automatic Reset Generation After  
Voltage Drop  
RESET Output Defined From V  
Precision Voltage Sensor  
≥ 1 V  
CC  
REF  
RESIN  
CT  
V
CC  
1
2
3
4
8
7
6
5
SENSE  
RESET  
RESET  
Temperature-Compensated Voltage  
Reference  
GND  
True and Complement Reset Outputs  
Externally Adjustable Pulse Duration  
TL7705BM . . . U PACKAGE  
(TOP VIEW)  
description  
1
2
3
4
5
NC  
REF  
RESIN  
CT  
NC  
V
SENSE  
RESET  
RESET  
10  
9
The TL7702B, TL7705B, and TL7733B are  
integrated-circuit supply-voltage supervisors  
designed for use as reset controllers in  
microcomputerandmicroprocessorsystems. The  
supply-voltage supervisor monitors the supply for  
undervoltage conditions at the SENSE input.  
During power up, the RESET output becomes  
CC  
8
7
GND  
6
NC – No internal connection  
active (low) when  
approaching 1 V. As V  
(assuming that SENSE is above V ), the delay  
V
attains  
approaches 3 V  
a
value  
CC  
CC  
TL7705BM . . . FK PACKAGE  
(TOP VIEW)  
T+  
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  
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  
the value of the external capacitor C :  
T
4
t ≈ 2.6 × 10 × C , where C is in farads (F) and  
d
T
T
t is in seconds (s).  
d
An external capacitor (typically 0.1 µF) must be  
connected to REF to reduce the influence of fast  
transients in the supply voltage.  
NC – No internal connection  
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 2002, 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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...9

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