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HD74LS221P Datasheet(PDF) 5 Page - Renesas Technology Corp |
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HD74LS221P Datasheet(HTML) 5 Page - Renesas Technology Corp |
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5 / 9 page ![]() HD74LS221 Rev.3.00, Jul.15.2005, page 5 of 8 Waveforms 1 Trigger from B, then clear (A input is low). B Input CLR Q Q 1.3V 1.3V 1.3V ≥ 60ns 1.3V 1.3V 1.3V 1.3V tTHL tTLH tPHL tw (in) tPLH tPLH tPHL VOH VOL 0V 3V 0V 3V 0V 3V 10% 10% 90% 90% Note: Input pulse: tTLH ≤ 15 ns, t THL ≤ 6 ns, PRR = 1 MHz Waveforms 2 Trigger from A, then clear (B input is high). A CLR Q Q 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V tTHL tTLH tPHL tPHL tw (in) ≥ 60ns tPLH tPLH VOH VOL VOH VOL 0V 3V 0V 3V 10% 10% 90% 90% Note: Input pulse: tTLH ≤ 15 ns, t THL ≤ 6 ns, PRR = 1 MHz |
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