Question

Simulate the following truth table using a 2:1 MUX and other logic gates.

A	B	C	Y
0	0	0	1
0	0	1	0
0	1	0	0
0	1	1	0
1	0	0	0
1	0	1	0
1	1	0	0
1	1	1	1

Answer 1

Mux contains many input lines ,single output lines and selection lines.In 2:1 mux there are 2 input lines , and 1 selection line.

Here s0 and s1 are the selective lines in both the diagrams.s0 indicates lsb and s1 indicates msb in selection lines in both the diagrams.

In second diagram s3 is input A

                            s4 is input B

                            s5 is input C

                            s6 is input D

Equation for the second diagram with logic gates is   ( A(~S0)+B.S0).(~S1)+(C(~S0)+D.S0).S1 on the basis of this equation the second diagram is implemented .

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