NAND Gate
The NAND Gate is obtained by combining AND gate and NOT gate. The output Y of AND gate is inverted by the NOT gate to get the final output Y.
Truth Table
| A | B | Y' | Y |
| 0 | 0 | 0 | 1 |
| 0 | 1 | 0 | 1 |
| 1 | 0 | 0 | 1 |
| 1 | 1 | 1 | 0 |
The truth table of a NAND gate shows that it gives output 1 when at least one of the inputs is 0.