NAND gate

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INPUT OUTPUT
A B A NAND B
0 0 1
0 1 1
1 0 1
1 1 0

The NAND gate is a logic gate used to build digital logic circuits. Given two inputs, A and B, A NAND B will be true if at most one of A and B is true. In other words, A NAND B is false if both A and B are true, and true otherwise. The NAND gate is a "universal gate."

Symbols[change | change source]

There are three symbols for NAND gates: the 'military' symbol and the 'rectangular' symbol. For more information see logic gate symbols.