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CD74HC21 Datasheet(PDF) 2 Page - Texas Instruments |
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CD74HC21 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 6 page ![]() 2 Functional Diagram Logic Symbol TRUTH TABLE INPUTS OUTPUT nA nB nC nD nY LX X X L XLX X L XX L X L XXX L L HHHHH NOTE: H = High Voltage Level, L = Low Voltage Level, X = Irrelevant 1A 1C 2A 2B 2D 1 4 5 9 12 13 6 2Y 1Y 8 1D GND = 7 VCC = 14 NC = 3, 11 2C 1B 2 10 nA nB nY nC nD CD74HC21, CD74HCT21 |