Elenco Understanding Logic Gates and Circuits User Manual download pdf (Page 28)

Project 17: Multiplexer

A

Q

B

 S represents the Selector

 Equals A when S=1

 Equals B when S=0

S

Input (A) Input (B) Input (S) Output (Q)

0 or 1 0 0 0

0 or 1 1 0 1

0 0 or 1 1 0

1 0 or 1 1 1

Multiplexers are often used as switches (e.g. telephone line switch, HDMI switch, etc.).

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3

4

1

2

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