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TC74AC640FT Fiches technique(PDF) 5 Page - Toshiba Semiconductor |
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TC74AC640FT Fiches technique(HTML) 5 Page - Toshiba Semiconductor |
5 / 9 page TC74AC245,640P/F/FT 2007-10-01 5 AC Characteristics (CL = 50 pF, RL = 500 Ω, input: tr = tf = 3 ns) Test Condition Ta = 25°C Ta = −40 to 85°C Characteristics Symbol VCC (V) Min Typ. Max Min Max Unit Propagation delay time (Note 2) tpLH tpHL ― 3.3 ± 0.3 5.0 ± 0.5 ― ― 7.0 5.0 10.9 7.5 1.0 1.0 12.4 8.5 ns Propagation delay time (Note 3) tpLH tpHL ― 3.3 ± 0.3 5.0 ± 0.5 ― ― 6.4 4.8 10.0 7.0 1.0 1.0 11.4 8.0 ns Output enable time tpZL tpZH ― 3.3 ± 0.3 5.0 ± 0.5 ― ― 9.3 7.1 15.3 10.5 1.0 1.0 17.4 12.0 ns Output disable time tpLZ tpHZ ― 3.3 ± 0.3 5.0 ± 0.5 ― ― 7.1 5.9 11.4 8.7 1.0 1.0 13.0 10.0 ns Input capacitance CIN DIR, G ― 5 10 ― 10 pF Bus input capacitance CI/O An, Bn ― 13 ― ― ― pF TC74AC245 ― 38 ― ― ― Power dissipation capacitance CPD (Note 1) TC74AC640 ― 36 ― ― ― pF Note 1: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (opr) = CPD·VCC·fIN·ICC/8 (per bit) Note 2: For TC74AC245 only Note 3: For TC74AC640 only |
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