Multiplexers
- It is a combinational circuit which have many data inputs and single output depending on control or select inputs
- For N input lines, log n (base2) selection lines, or we can say that for 2^n input lines, n selection lines are required
- Logic like if, else if, else statements
- 2x1 Mux
Y = S0'*D0 + S0*D1
| S0 | Y |
|---|---|
| 0 | D0 |
| 1 | D1 |
- 4x1 Mux
Y = S1'*S0'*D0 + S1'*S0*D1 + S1*S0'*D2 + S1*S0*D3
| S1 | S0 | Y |
|---|---|---|
| 0 | 0 | D0 |
| 0 | 1 | D1 |
| 1 | 0 | D2 |
| 1 | 1 | D3 |