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TL7700A PDF预览

TL7700A

更新时间: 2024-11-05 22:42:11
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 监控
页数 文件大小 规格书
7页 53K
描述
SUPPLY VOLTAGE SUPERVISORS

TL7700A 数据手册

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TL7700A Series  
SUPPLY VOLTAGE SUPERVISORS  
.
.
POWER-ON RESET GENERATOR  
AUTOMATIC RESET GENERATION AFTER  
VOLTAGEDROP  
WIDE SUPPLY VOLTAGE RANGE ... 3V TO  
18V  
PRECISION VOLTAGESENSOR  
TEMPERATURE-COMPENSATED VOLTAGE  
REFERENCE  
.
.
.
.
.
TRUE AND COMPLEMENT RESET OUTPUTS  
EXTERNALLY ADJUSTABLE PULSE WIDTH  
N
Minidip  
DESCRIPTION  
TheTL7700Aseriesaremonolithicintegratedcircuit  
supplyvoltagesupervisorsspecificallydesi-gnedfor  
use as reset controllers in microcomputer and mi-  
croprocessorsystems. During power-upthe device  
tests the supply voltageand keeps the RESET and  
RESET outputs active (high and low, respectively)  
as long as the supply voltage has not reached its  
nominal voltage value. Taking RESIN low has the  
sameeffect.Toensurethatthe microcomputersys-  
temhasreset,theTL7700Atheninitiatesaninternal  
timedelaythatdelaysthereturnofthe resetoutputs  
totheirinactivestates.Sincethetimedelay formost  
microcomputersandmicroprocessorsis intheorder  
of several machine cycles, the device internal time  
delayis determinedby an externaltime delay is de-  
termined by an externalcapacitorconnectedto the  
CT input (pin 3).  
D
SO8  
ORDERING NUMBERS  
Temperature Range  
0 to 70oC  
Minidip  
TL77XXACP  
TL77XXAIP  
S08  
TL77XXACD  
TL77XXAID  
-25 to 85oC  
PIN CONNECTION (top view)  
td =1.3 x 104 x CT  
Where : CT is in farads(F) and td inseconds (s). In  
addition, when the supply voltage drops below the  
nominal value, the outputs will be active until the  
supplyvoltagereturns to the nominal value. An ex-  
ternalcapacitor(typically0.1µF)mustbeconnected  
to the REF output (pin 1) to reduce the influenceof  
fast transientsin the supply voltage.  
The TL7700AIseries is characterized for operation  
from25oC to85oC ; theTL7700ACseriesis char-  
acterizedfrom 0oC to70oC.  
1/7  
April 2000  

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