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HD74LS221P Datasheet(PDF) 7 Page - Renesas Technology Corp |
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HD74LS221P Datasheet(HTML) 7 Page - Renesas Technology Corp |
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7 / 9 page  HD74LS221 Rev.3.00, Jul.15.2005, page 7 of 8 Waveforms 5 Clear overriding B, then trigger from B. Not Triggered Triggered B Input CLR Q 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V tTHL tTLH tsu ≥ 50ns ≥ 0ns tw (out) VOH VOL 0V 3V 0V 3V 10% 10% 90% 90% Note: Input pulse: tTLH ≤ 15 ns, t THL ≤ 6 ns, PRR = 1 MHz Waveforms 6 Positive transition of Clear. B Input CLR Q 1.3V 1.3V 1.3V 1.3V tTHL tTLH ≥ 50ns VOH VOL 0V 3V 0V 3V 10% 10% 90% 90% ≥ 50ns Note: Input pulse: tTLH ≤ 15 ns, t THL ≤ 6 ns, PRR = 1 MHz |
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