Digital Electronics - Logic Gates - Discussion


How many inputs are on the logic gates of a 74HC21 IC?

[A]. 1
[B]. 2
[C]. 3
[D]. 4

Answer: Option D


No answer description available for this question.

Xyz said: (Aug 3, 2011)  
The right answer is D because 74hc21 is dual 4-input AND gate ttl IC.

Mlg said: (Aug 19, 2013)  
7421 have 2 logic gate of 4 input and gate.

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