2x1 Multiplexer
A 2X1 multiplexer uses one control switch (S) to connect one of two input data lines (A or B) to a single output (Z). Only one of the input data lines can be aligned to the output of the multiplexer at any given time.
Equation: $$Z=(A.S)+ (B.S')$$.
2x1 Multiplexer symbol
2x1 Multiplexer circuits
2x1 Multiplexer truth table
| S | B | A | Z |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 1 |
| 0 | 1 | 0 | 0 |
| 0 | 1 | 1 | 1 |
| 1 | 0 | 0 | 0 |
| 1 | 0 | 1 | 0 |
| 1 | 1 | 0 | 1 |
| 1 | 1 | 1 | 1 |