Question

create a 1×4 demultiplex truth table .​

Answer 1

Explanation:

select inputs S0=0 and S1= 1 and so on.

S0 S1 D0 D1 D2 D3 Y

0 0 0 X X X 0

0 0 1 X X X 1

0 1 X 0 X X 0

0 1 X 1 X X 1

1 0 X X 0 X 0

1 0 X X 1 X 1

1 1 X X X 0 0

1 1 X X X 1 1

From the above truth table, we can write the output expressions as follows:

Y = S0 S1 D0 + S0 S1 D1 + S0 S1 D2 + S0 S1 D3