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TC74HC257AF 数据表(PDF) 4 Page - Toshiba Semiconductor |
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TC74HC257AF 数据表(HTML) 4 Page - Toshiba Semiconductor |
4 / 8 page TC74HC257AP/AF/AFN 2007-10-01 4 AC Characteristics (input: tr = tf = 6 ns) Test Condition Ta = 25°C Ta = −40~85°C Characteristics Symbol CL (pF) VCC (V) Min Typ. Max Min Max Unit Output transition time tTLH tTHL ⎯ 50 2.0 4.5 6.0 ⎯ ⎯ ⎯ 20 6 5 60 12 10 ⎯ ⎯ ⎯ 75 15 13 ns 50 2.0 4.5 6.0 ⎯ ⎯ ⎯ 45 13 11 100 20 17 ⎯ ⎯ ⎯ 125 25 21 Propagation delay time (A, B-Y, Y) tpLH tpHL ⎯ 150 2.0 4.5 6.0 ⎯ ⎯ ⎯ 62 18 15 140 28 24 ⎯ ⎯ ⎯ 175 35 30 ns 50 2.0 4.5 6.0 ⎯ ⎯ ⎯ 45 13 11 100 20 17 ⎯ ⎯ ⎯ 125 25 21 Propagation delay time (SELECT-Y, Y) tpLH tpHL ⎯ 150 2.0 4.5 6.0 ⎯ ⎯ ⎯ 62 18 15 140 28 24 ⎯ ⎯ ⎯ 175 35 30 ns 50 2.0 4.5 6.0 ⎯ ⎯ ⎯ 40 12 10 110 22 19 ⎯ ⎯ ⎯ 140 28 24 3-state output enable time tpZL tpZH RL = 1kΩ 150 2.0 4.5 6.0 ⎯ ⎯ ⎯ 57 17 14 150 30 26 ⎯ ⎯ ⎯ 190 38 33 ns 3-state output disable time tpLZ tpHZ RL = 1kΩ 50 2.0 4.5 6.0 ⎯ ⎯ ⎯ 28 14 13 140 28 24 ⎯ ⎯ ⎯ 175 35 30 ns Input capacitance CIN ⎯ ⎯ 5 10 ⎯ 10 pF Output capacitance COUT ⎯ ⎯ 10 ⎯ ⎯ ⎯ pF Power dissipation capacitance CPD (Note) ⎯ ⎯ 47 ⎯ ⎯ ⎯ pF Note: 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/4 (per bit) |
类似零件编号 - TC74HC257AF |
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类似说明 - TC74HC257AF |
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