4x1 Multiplexer
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Author: Lester Sharma

Forked from: AASHIK KUMAR R/4x1 Multiplexer

Project access type: Public

Description:

Multiplexer is a combinational circuit that has maximum of 2n data inputs, ‘n’ selection lines and single output line. One of these data inputs will be connected to the output based on the values of selection lines.

Since there are ‘n’ selection lines, there will be 2n possible combinations of zeros and ones. So, each combination will select only one data input. Multiplexer is also called as Mux.

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.



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.

TRUTH TABLE


Selection LinesOutputS1S0Y00I001I110I211I3


From Truth table, we can directly write the Boolean function for output, Y as

Y=S1S0I0+S1S0I1+S1S0I2+S1S0I3Y=S1′S0′I0+S1′S0I1+S1S0′I2+S1S0I3

We can implement this Boolean function using Inverters, AND gates & OR gate. The circuit diagram of 4x1 multiplexer is shown in the following figure.

CIRCUIT DAIGRAM

                                     

Created: Jan 11, 2023

Updated: Aug 27, 2023


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