XOR gate

INPUT		OUTPUT
A	B	A XOR B
0	0	0
0	1	1
1	0	1
1	1	0

The XOR gate (Exclusive OR) is a logic gate that outputs 1 (true) when exactly one of its inputs is 1 (true). That means that if both of its inputs are the same, the output will be 0 (false). The XOR gate does what is called an exclusive disjunction in logic.

Symbols

There are three symbols for the XOR gate:


MIL/ANSI Symbol	IEC Symbol	DIN Symbol

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XOR Gate Media

ANSI Symbol for an XOR Gate
IEC Symbol for an XOR Gate
DIN Symbol for an XOR Gate
XOR gate implemented using CMOS logic
Transmission gate implementation of XOR gate
Optimized transmission Gate Logic wiring of an XOR gate
XOR gate circuit using three mixed gates
A labelled MIL/ANSI symbol for an XOR gate. A and B are the inputs, Q is the output
A way of building an XOR gate from only NAND gates. This construction has a propagation delay 3 times that of a single gate and uses 4 gates.
A way of building an XOR gate from only NOR gates. This construction has a propagation delay 4 times that of a single gate and uses 5 gates- an alternative design has just 3, and uses the same number of gates.