Multiplexers & De-multiplexers

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Multiplexer

Multiplexer is a combinational logic circuit designed to switch one of several input lines to a single common output line.

2 to 1 Multiplexer

The input A of this simple 2-1 line multiplexer circuit constructed from standard NAND gates acts to control which input ( I0 or I1 ) gets passed to the output at Q.

Simulation of 2 to 1 Multiplexer



4 to 1 Multiplexer

4 to 1 Multiplexer Using NAND gates





Simulation of 4 to 1 Multiplexer





De-multiplexers

The demultiplexer is a combinational logic circuit designed to switch one common input line to one of several seperate output line.



1-to-4 Channel De-multiplexer & truth table

Simulation of 1 to 4 De-multiplexer










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