Multiplexer Schematic Diagram. 4x1 multiplexer has four data inputs i 3 i 2 i 1 i 0 two selection lines s 1 s 0 and one output y. A 2 n 1 multiplexer has 2 n input lines n select lines and a single output line.
The four input bits are d0 d1 d2 and d3. A 2 n 1 multiplexer has 2 n input lines n select lines and a single output line. 4x1 multiplexer has four data inputs i 3 i 2 i 1 i 0 two selection lines s 1 s 0 and one output y.
The truth table of a 4 to 1 multiplexer is shown below in which four input combinations 00 10 01 and 11 on the select lines respectively switches the inputs d0 d2 d1 and d3 to the output.
The figure below shows the block diagram of a 4 to 1 multiplexer in which the multiplexer decodes the input through select line. Truth table of 4x1 multiplexer is shown below. The schematic on the right shows a 2 to 1 multiplexer on the left and an equivalent switch on the right. Multiplexers are not limited to just switching a number of different input lines or channels to one common single output.
