參數(shù)資料
型號: TL7715AD
廠商: Texas Instruments, Inc.
英文描述: SUPPLY-VOLTAGE SUPERVISORS
中文描述: 電源電壓監(jiān)事
文件頁數(shù): 1/7頁
文件大小: 67K
代理商: TL7715AD
TL7700 A Series
August1996
SUPPLY VOLTAGE SUPERVISORS
.
POWER-ONRESET GENERATOR
.
AUTOMATIC RESET GENERATION AFTER
VOLTAGEDROP
.
WIDE SUPPLY VOLTAGE RANGE ... 3V TO
TEMPERATURE-COMPENSATED VOLTAGE
REFERENCE
.
TRUE AND COMPLEMENT RESETOUTPUTS
.
EXTERNALLYADJUSTABLEPULSE WIDTH
18V
.
PRECISIONVOLTAGESENSOR
N
Minidip
DESCRIPTION
TheTL7700Aseriesaremonolithicintegratedcircuit
supplyvoltagesupervisorsspecificallydesi-gnedfor
use as reset controllers in microcomputer and mi-
croprocessorsystems.During power-upthedevice
teststhesupplyvoltageand keepstheRESETand
RESET outputsactive (high and low, respectively)
as long as the supply voltage has not reached its
nominal voltage value. Taking RESIN low has the
sameeffect.Toensurethatthemicrocomputersys-
temhasreset,theTL7700Atheninitiatesaninternal
timedelaythatdelaysthereturnoftheresetoutputs
totheirinactivestates.Sincethetimedelayformost
microcomputersandmicroprocessorsisintheorder
of several machinecycles, the device internaltime
delayis determinedby an externaltimedelayisde-
terminedby an externalcapacitorconnectedto the
C
T
input(pin3).
t
d
=1.3 x 10
4
x C
T
Where: C
T
is in farads(F) and t
d
inseconds (s). In
addition,when the supply voltage drops below the
nominal value, the outputs will be active until the
supplyvoltagereturns to the nominalvalue. An ex-
ternalcapacitor(typically0.1
μ
F)mustbeconnected
to theREF output(pin 1) to reducetheinfluenceof
fasttransientsin the supply voltage.
The TL7700AIseries is characterizedforoperation
from–25
o
C to85
o
C ;theTL7700ACseriesis char-
acterizedfrom 0
o
C to70
o
C.
D
SO8
ORDERING NUMBERS
Temperature Range
0 to 70
o
C
-25 to 85
o
C
Minidip
TL77XXACP
TL77XXAIP
S08
TL77XXACD
TL77XXAID
PIN CONNECTION
(top view)
1/7
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