Multiplexer Circuit

Detailed Discussion

1)What is Multiplexer or MUX?
A Multiplexer is a Combinational circuit that selects binary information from one of many input lines and directs it to a single output line. Generaly a Multiplexer has maximum of 2^n data inputs, ‘n’ selection lines and one output line. One of these data inputs will be connected to the output based on the values of selection lines. Multiplexer is also called as Mux.

2) 4x1 Multiplexer
4x1 Multiplexer has four data inputs I3, I2, I1 & I0, two selection lines s1 & s0 and one output Y. The block diagram of 4x1 Multiplexer is shown in the following figure. 4x1 Multiplexer block diagram
One of these 4 inputs will be connected to the output based on the combination of inputs present at these two selection lines. Truth table of 4x1 Multiplexer is shown below. 4x1 Multiplexer truth table
4x1 Multiplexer Circuit/ Logical Diagram
Half adder logical diagram    3) Truth Table of 8x1 Multiplexer
4x1 Multiplexer block diagram
   4) Truth Table of 16x1 Multiplexer