The NOR gate is a digital logic gate that implements logical NOR - it behaves according to the truth table below. A HIGH output (1) results if both the inputs to the gate are LOW (0) if one or both input is HIGH (1), a LOW output (0) results. NOR is the result of the negation of the OR operator.

Inputs Outputs
A B Q
0 0 1
0 1 0
1 0 0
1 1 0

Truth Table

MIL/ANSI Symbol