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CD74HCT640ME4 数据表(PDF) 2 Page - Texas Instruments |
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CD74HCT640ME4 数据表(HTML) 2 Page - Texas Instruments |
2 / 12 page 2 Functional Diagram OUTPUT ENABLE AND DIRECTION-SELECT LOGIC A0 A7 OE DIR B0 B7 A1 THRU A6 B1 THRU B6 VCC = 20 GND = 10 TRUTH TABLE CONTROL INPUTS DATA PORT STATUS OE DIR An Bn LL OI HH Z Z HL Z Z LH I O To prevent excess currents in the High-Z modes all I/O terminals should be terminated with 1k Ω to 1MΩ resistors. H = High Level L = Low Level I = Input O = Output (Inversion of Input Level) Z = High Impedance CD54HC640, CD74HC640, CD54HCT640, CD74HCT640 CD54HC640, CD74HC640, CD54HCT640, CD74HCT640 |
类似零件编号 - CD74HCT640ME4 |
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类似说明 - CD74HCT640ME4 |
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