Multiplexer and Demultiplexer
What is Multiplexer ?
Multiplexer is a combinational circuit that has 2n input lines and one of these inputs goes to single output lines. To select one from given 2n inputs, we have n selection lines. A multiplexer with 2n input lines and 1 output line is known as 2n to 1 multiplexer. It is also known as data selector as it selects one of many inputs and directs it to output line.
Block Diagram of Multiplexer
What is Demultiplexer?
Demultiplexer is also a combinational circuit whose function is just opposite to that of multiplexer. Demultiplexer has one input line and 2n output lines. The specific output line is selected by using n selection lines.