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Combinational circuit 2

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Combinational Circuit - II Unit 3 Cont… Multiplexer (Data Selector) • It is a combinational circuit which have many data inputs and single output depending on control or select inputs.​ • we can say that for 2n input lines, n selection lines are required. Multiplexers are also known as “Data n selector, parallel to serial convertor, many to one circuit, universal logic circuit​”. • Multiplexers are mainly used to increase amount of the data that can be sent over the network within certain amount of time and bandwidth. • The multiplexer is a multi-input and single-output combinational circuit. The binary information is received from the input lines and directed to the output line. On the basis of the values of the selection lines, one of these data inputs will be connected to the output. 2:1 Multiplexer • In 2:1 multiplexer, there are only two inputs, i.e., A0 and A1, 1 selection line, i.e., S0 and single outputs, i.e., Y. • On the basis of the combination of inputs which are present at the selection line S0, one of these 2 inputs will be connected to the output. • The block diagram and the truth table of the 2:1 multiplexer are given below. 4:1 Multiplexer • In the 4:1 multiplexer, there is a total of four inputs, i.e., A0, A1, A2, and A3, 2 selection lines, i.e., S0 and S1 and single output, i.e., Y. • On the basis of the combination of inputs that are present at the selection lines S0 and S1, one of these 4 inputs are connected to the outp ...
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