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TL7705A Folha de dados(PDF) 1 Page - STMicroelectronics |
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TL7705A Folha de dados(HTML) 1 Page - STMicroelectronics |
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1 / 7 page  TL7700 A Series August 1996 SUPPLY VOLTAGE SUPERVISORS . POWER-ON RESET GENERATOR . AUTOMATIC RESET GENERATION AFTER VOLTAGE DROP . WIDE SUPPLY VOLTAGE RANGE ... 3V TO 18V . PRECISION VOLTAGE SENSOR . TEMPERATURE-COMPENSATED VOLTAGE REFERENCE . TRUE AND COMPLEMENT RESET OUTPUTS . EXTERNALLY ADJUSTABLE PULSE WIDTH N Min idip DESCRIPTION The TL7700Aseriesaremonolithicintegratedcircuit supplyvoltagesupervisorsspecifically desi-gned for use as reset controllers in microcomputer and mi- croprocessor systems. During power-up the device tests the supply voltage and 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 same effect. To ensure that the microcomputer sys- tem hasreset, the TL7700Athen initiates an internal time delay that delays the return of the reset outputs to theirinactivestates. Since the timedelay for most microcomputersand microprocessors is in the order of several machine cycles, the device internal time delay is determined by an external time delay is de- termined by an external capacitor connected to the CT input (pin 3). td = 1.3 x 10 4 xCT Where : CT is in farads (F) and td in seconds (s). In addition, when the supply voltage drops below the nominal value, the outputs will be active until the supply voltage returns to the nominal value. An ex- ternalcapacitor(typically0.1 µF)mustbe connected to the REF output (pin 1) to reduce the influence of fast transients in the supply voltage. The TL7700AI series is characterized for operation from – 25 oCto 85oC ; the TL7700AC series is char- acterized from 0 oCto 70oC. D SO 8 ORDERING NUMBERS Temperature Range Minidip S08 0to 70 oC TL77XXACP TL77XXACD -25 to 85 oC TL77XXAIP TL77XXAID PIN CONNECTION (top view) 1/7 |
Nº de peça semelhante - TL7705A |
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Descrição semelhante - TL7705A |
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