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HD74BC244A Datasheet(PDF) 5 Page - Hitachi Semiconductor |
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HD74BC244A Datasheet(HTML) 5 Page - Hitachi Semiconductor |
5 / 8 page HD74BC244A 5 Switching Test Method (C L = 50 pF) Ta = 25 °C V CC = 5.0 V Ta = –40 to 85 °C V CC = 5.0 V ±10% Item Symbol Min Max Min Max Unit Test Conditions Propagation delay time t PLH 3.0 6.0 3.0 7.0 ns See under figure t PHL 3.0 6.0 3.0 7.0 Output enable time t ZH 3.0 8.0 3.0 10.0 ns t ZL 3.0 8.0 3.0 10.0 Output disable time t HZ 3.0 7.0 3.0 9.0 ns t LZ 3.0 7.0 3.0 9.0 Input capacitanse C IN 3.0(Typ) — pF V IN = VCC or GND Output capacitance C O 15.0(Typ) — pF V O = VCC or GND Test Circuit VCC 1A1 G VCC Input Pulse Generator Zout = 50 Ω OPEN 7 V C = 50 pF L 50 Scope Ω 500 Ω 450 Ω Output 1A2 1A3 1A4 Same as above load circuit 1Y1 1Y2 1Y3 1Y4 Output *3 Same as above load circuit Same as above load circuit Notes: 1. C L includes probe and jig capacitance. 2. 2 G, 2A1-2A4 to 2Y1-2Y4 are identical to above load circuit. 2. Open: t PLH, t PHL, t ZH, t HZ 7 V: t ZL, t LZ |
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