4 Input Multiplexer Circuit Diagram. These two control lines can form 4 different combinational logic signals and for each signal one. So for a 4 input multiplexer we would therefore require two data select lines as 4 inputs represents 2 2 data control lines give a circuit with four inputs i 0 i 1 i 2 i 3 and two data select lines a and b as shown.
The particular input combination on select lines selects one of input d0 through d3 to the output. It is just that it will have 4 input pins and 1 output pins with two control lines. The implementation of multiplexer takes three steps.
Thus it is evident from the diagram below that d0 d1 d2 and d3 are the input lines and a b are the two selection lines.
Higher order multiplexers 4 1 multiplexer. A 4 to 1 multiplexer consists four data input lines as d0 to d3 two select lines as s0 and s1 and a single output line y. Design truth table logical expression circuit diagram for it. And to control which input should be selected out of these 4 we need 2 selection lines.
