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.
