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CD74HCT243E Scheda tecnica(PDF) 2 Page - Texas Instruments |
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CD74HCT243E Scheda tecnica(HTML) 2 Page - Texas Instruments |
2 / 12 page 2 Functional Diagram ‘HC243, ‘HCT243 TRUTH TABLE CONTROL INPUTS HC, HCT243 SERIES DATA PORT STATUS OEB OEA An Bn HH O I LH Z Z HL Z Z LL I O H= High Voltage Level L= Low Voltage Level I= Input O= Output (Same Level as Input) Z= High Impedance To prevent excess currents in the High Z modes all I/O terminals should be terminated with 10k Ω to 1M Ω resistors. DIRECTION SELECT LOGIC A0 A1 A2 A3 OEB OEA 3 4 5 6 1 13 11 10 9 8 B0 B1 B2 B3 CD54HC243, CD74HC243, CD54HCT243, CD74HCT243 |
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