AND Gate

Truth table for an AND gate
Input AInput BOutput
falsefalsefalse
falsetruefalse
truefalsefalse
truetruetrue

An AND gate is a digital logic gate with two or more inputs and one output that performs logical conjunction. The output of an AND gate is true only when all of the inputs are true. If one or more of an AND gate's inputs are false, then the output of the AND gate is false.

The truth table for an AND gate with two inputs appears to the right.

Symbols

Each of the symbols below can be used to represent an AND gate. There are multiple international standards defined, and one may preferred over the other in your region of the world.

ASNI / IEEEIEC
ANSI / IEEE AND Gate symbol IEC AND Gate symbol

Live Example

Try the following interactive example to see for yourself how an AND gate behaves.

Further Reading

To learn more, check out the following external resources:

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