2X4 Decoder
2x4 decoder is high at logic level “1” while the remaining outputs are held low at logic “0” so only one output can be high (1) at any one time.
2x4 decoder symbol
2x4 decoder circuits
2x4 decoder truth table
| A | B | Q0 | Q1 | Q2 | Q3 |
|---|---|---|---|---|---|
| 0 | 0 | 1 | 0 | 0 | 0 |
| 0 | 1 | 0 | 1 | 0 | 0 |
| 1 | 0 | 0 | 0 | 1 | 0 |
| 1 | 1 | 0 | 0 | 0 | 1 |