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74F174PC 数据表(PDF) 4 Page - National Semiconductor (TI) |
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74F174PC 数据表(HTML) 4 Page - National Semiconductor (TI) |
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4 / 8 page ![]() AC Electrical Characteristics 74F 54F 74F TA ea25 C TA VCC e Mil TA VCC e Com Symbol Parameter VCC ea50V CL e 50 pF CL e 50 pF Units CL e 50 pF Min Typ Max Min Max Min Max fmax Maximum Clock Frequency 80 70 80 MHz tPLH Propagation Delay 35 55 80 30 100 35 90 ns tPHL CP to Qn 40 70 100 40 120 40 110 tPHL Propagation Delay 50 100 140 50 160 50 150 ns MR to Qn AC Operating Requirements 74F 54F 74F Symbol Parameter TA ea25 C TA VCC e Mil TA VCC e Com Units VCC ea50V Min Max Min Max Min Max ts(H) Setup Time HIGH or LOW 48 50 48 ts(L) Dn to CP 40 50 40 ns th(H) Hold Time HIGH or LOW 0 20 0 th(L) Dn to CP 0 20 0 tw(H) CP Pulse Width 40 50 40 ns tw(L) HIGH or LOW 60 75 60 tw(L) MR Pulse Width LOW 50 65 50 ns trec Recovery Time MR to CP 50 60 50 4 |
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