The EX-OR gate has only two inputs and one output. It produces a High output when the two inputs are at opposite logic levels. The output is Low when both inputs are High or Low. Operating power supply voltage =5V Dc.

The combination of  Transistor Transistor logic gates like  (TTL)  NOT Gate, AND Gate and OR Gate  is called as EX-OR Gate.
Operation:
Case I:      A=B=0, then the Logic equation Y =0.1+1.0 = 0.
Case II:    A=0; B=1 then Y=0.0 + 1.1 = 1.
Case III:   A=1 B=0 then Y=1.1 + 0.0 = 1.
Case IV:    A=1; B=1 then Y= 1.0 + 0.1 = 0.
Boolean Logic Expression:
The input variables are A,B and the output variable is Y, the the logic expression for EX-OR Logic Gate is

 Input A Input B O/P=Y 0 0 1 0 1 0 1 0 0 1 1 1

An NOT GATE is added with Ex- OR output is called Ex-NOR gate.  Application: An EX-OR Gate can be used as a TWO-BIT ADDER. It is used for checking and generating the parity of a binary number. IC for EX-OR gate 74Ls 86 is a 14 pin dual in-line type contained quad EX-OR Gates.