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HD74HC78 Datasheet(PDF) 5 Page - Renesas Technology Corp |
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HD74HC78 Datasheet(HTML) 5 Page - Renesas Technology Corp |
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5 / 7 page  HD74HC78 Rev.2.00, Oct 06, 2005 page 5 of 6 Waveforms VOH VOL 0 V VCC VOH VOL 50 % tPHL 50 % tPLH 50 % 50 % 10 % 90 % Clear Q Q 10 % 90 % tr tf 0 V VCC VOH Clock Q or Q Q or Q 50 % 10 % 90 % tr 10 % tf 50 % 50 % 50 % tw (L) tw (H) 10 % 90 % tTLH 10 % tTHL 90 % 10 % 90 % tTLH 10 % tTHL 50 % 50 % 50 % 50 % tPHL tPLH tPHL tPLH VOL VOH VOL 0 V VCC 50 % 50 % 10 % 90 % Preset tf tr tw(preset) tw(clear) 90 % tPLH 50 % tPHL 50 % 90 % 10 % tTHL tTLH 90 % 10 % • Waveform − 1 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns 2. The output are measured one at a time with one transition per measurement. Notes: • Waveform − 2 |
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