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HD74HC91 Datasheet(PDF) 4 Page - Renesas Technology Corp |
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HD74HC91 Datasheet(HTML) 4 Page - Renesas Technology Corp |
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4 / 6 page  HD74HC91 Rev.2.00, Oct 06, 2005 page 4 of 5 Test Circuit VCC Clock VCC Zout = 50 Ω Input Zout = 50 Ω Input CL = 50 pF Output CL = 50 pF Output QH QH A B Note: C includes the probe and jig capacitance. L Pulse generator Pulse generator Waveforms 0 V VCC VOH Clock QH QH 50 % 10 % 90 % tr 10 % tf 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 90 % • Waveform − 1 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns Note: 0 V VCC A or B 10 % 90 % tr 10 % tf 90 % 50 % 50 % 50 % th (H) tsu (H) tsu (L) th (L) |
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