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74F1604 数据表(PDF) 3 Page - NXP Semiconductors |
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74F1604 数据表(HTML) 3 Page - NXP Semiconductors |
3 / 10 page Philips Semiconductors Product specification 74F1604 Latch October 4, 1990 3 LOGIC DIAGRAM 9 10 5 6 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 VCC = Pin 28 GND = Pin 14 D E Q Q 15 A0 B0 D E 3 4 D E Q Q 13 A1 B1 D E D E Q Q 12 A2 B2 D E 7 8 D E Q Q 11 A3 B3 D E D E Q Q 16 A4 B4 D E 27 26 D E Q Q 17 A5 B5 D E 25 24 D E Q Q 18 A6 B6 D E 23 22 D E Q Q 19 A7 B7 D E 21 20 2 1 SELECT A/B LE SF00556 FUNCTION TABLE INPUTS OUTPUTS OUTPUTS OPERATING MODE A0 – A7 B0 –B7 SELECT A/B LE Q0 – Q7 A data B data L L B data Enable and read register A data B data H L A data Enable and read register X X X H NC Hold A data B data l ↑ B data Latch and read register A data B data h ↑ A data Latch and read register Notes to function table H = High–voltage level h = High–voltage level one setup time before the low–to–high latch enable transition L = Low–voltage level l = Low–voltage level one setup time before the low–to–high latch enable transition NC= No change ( If SELECT A/B is toggled and the A latched data is different from B latched data then the output will change accordingly.) X = Don’t care ↑ = Low–to–high latch enable transition |
类似零件编号 - 74F1604 |
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类似说明 - 74F1604 |
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