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SN74LS393D 数据表(PDF) 5 Page - ON Semiconductor |
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SN74LS393D 数据表(HTML) 5 Page - ON Semiconductor |
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5 / 5 page ![]() 5-5 FAST AND LS TTL DATA SN54/74LS390 • SN54/74LS393 AC SETUP REQUIREMENTS (TA = 25°C, VCC = 5.0 V) Sb l P Limits Ui T C di i Symbol Parameter Min Typ Max Unit Test Conditions tW Clock Pulse Width LS393 20 ns V5 0 V tW CP0 Pulse Width LS390 20 ns V5 0 V tW CP1 Pulse Width LS390 40 ns VCC = 5.0 V tW MR Pulse Width LS390/393 20 ns trec Recovery Time LS390/393 25 ns AC WAVEFORMS *The number of Clock Pulses required between tPHL and tPLH measurements can be determined from the appropriate Truth Table. *CP Q Q MR & MS CP 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V tPHL tPHL tPLH Figure 1 Figure 2 tW tW trec |
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