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CD74AC161M Datasheet(PDF) 8 Page - Texas Instruments |
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CD74AC161M Datasheet(HTML) 8 Page - Texas Instruments |
8 / 15 page CD54AC161, CD74AC161 4-BIT SYNCHRONOUS BINARY COUNTERS SCHS239C – SEPTEMBER 1998 – REVISED MARCH 2003 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating free-air temperature range (unless otherwise noted) VCC –55 °C to 125 °C –40 °C to 85 °C UNIT CC MIN MAX MIN MAX 1.5 V 7 8 fclock Clock frequency 3.3 V ± 0.3 V 64 73 MHz 5 V ± 0.5 V 90 103 1.5 V 69 61 CLK high or low 3.3 V ± 0.3 V 7.7 6.8 t Pulse duration 5 V ± 0.5 V 5.5 4.8 ns tw Pulse duration 1.5 V 63 55 ns CLR low 3.3 V ± 0.3 V 7 6.1 5 V ± 0.5 V 5 4.4 ↑ 1.5 V 63 55 ↑ A, B, C, or D 3.3 V ± 0.3 V 7 6.1 t Setup time before CLK ↑ 5 V ± 0.5 V 5 4.4 ns tsu Setup time, before CLK ↑ 1.5 V 75 66 ns LOAD 3.3 V ± 0.3 V 8.4 7.4 5 V ± 0.5 V 6 5.3 ↑ 1.5 V 0 0 ↑ A, B, C, or D 3.3 V ± 0.3 V 0 0 th Hold time after CLK ↑ 5 V ± 0.5 V 0 0 ns th Hold time, after CLK ↑ 1.5 V 0 0 ns ENP or ENT 3.3 V ± 0.3 V 0 0 5 V ± 0.5 V 0 0 ↑ ↑ 1.5 V 75 66 trec Recovery time, CLR ↑ before CLK↑ 3.3 V ± 0.3 V 8.4 7.4 ns 5 V ± 0.5 V 6 5.3 |
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