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.