XNOR gate symbol
Also called Exclusive NOR, XNOR, Equivalence gate
The output is 1 when the inputs are the same.
ANSI / IEEE
IEC 60617What the XNOR gate symbol means
The output is 1 when the inputs are the same.
ANSI and IEC symbols
Where you see it
Digital electronics, PLC function block diagrams, interlock and safety logic, and cause and effect logic.
Related symbols
Frequently asked questions
What does the XNOR gate symbol look like?
On ANSI drawings: An XOR body with a circle at the output. In IEC 60617: A rectangle marked =1, with a small circle at the output for the inverted output.
Is the XNOR gate symbol the same in IEC and ANSI?
No. A rectangle marked =1, with a small circle at the output for the inverted output.
Where is a XNOR gate used?
Digital electronics, PLC function block diagrams, interlock and safety logic, and cause and effect logic.
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