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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HD74LS221 데이터시트(PDF) 6 Page - Renesas Technology Corp |
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HD74LS221 데이터시트(HTML) 6 Page - Renesas Technology Corp |
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6 / 9 page  HD74LS221 Rev.3.00, Jul.15.2005, page 6 of 8 Waveforms 3 Trigger from B, then clear (A input is low). ≥ 60ns B Input CLR Q 1.3V 1.3V tTHL tTLH VOH VOL 0V 3V 0V 3V 10% 10% 90% 90% Note: Input pulse: tTLH ≤ 15 ns, t THL ≤ 6 ns, PRR = 1 MHz Waveforms 4 Trigger from A (B and clear input are high). A Q Q 1.3V 1.3V 1.3V 1.3V tw (out) tw (out) tTHL tTLH 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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