![]() The block diagram and the truth table of the 4 ×1 multiplexer are given below. On the basis of the combination of inputs that are present at the selection lines S 0 and S 1, one of these 4 inputs are connected to the output. In the 4×1 multiplexer, there is a total of four inputs, i.e., A 0, A 1, A 2, and A 3, 2 selection lines, i.e., S 0 and S 1 and single output, i.e., Y. Logical circuit of the above expression is given below: 4×1 Multiplexer: The logical expression of the term Y is as follows: The block diagram and the truth table of the 2 ×1 multiplexer are given below. On the basis of the combination of inputs which are present at the selection line S 0, one of these 2 inputs will be connected to the output. In 2×1 multiplexer, there are only two inputs, i.e., A 0 and A 1, 1 selection line, i.e., S 0 and single outputs, i.e., Y. There are various types of the multiplexer which are as follows: 2×1 Multiplexer: So, there is a total of 2 N possible combinations of inputs. Unlike encoder and decoder, there are n selection lines and 2 n input lines. On the basis of the values of the selection lines, one of these data inputs will be connected to the output. The binary information is received from the input lines and directed to the output line. Simply, the multiplexer is a multi-input and single-output combinational circuit. A multiplexer is a combinational circuit that has 2 n input lines and a single output line. ![]()
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