Digital Logic Fundamentals Unit 3 – Exclusive-OR/NOR Gates
Exercise 1 – Exclusive OR/NOR Gate Functions
EXERCISE OBJECTIVE
When you have completed this exercise, you will be able to demonstrate the operation of an
EXCLUSIVE-OR and an EXCLUSIVE-NOR logic gate. You will verify your results by
generating truth tables for each function.
EXERCISE DISCUSSION
- A 74LS136 IC package can be configured to provide both XOR and XNOR functions.
- The output of an XOR circuit is high for input conditions of inequality.
- The output of an XNOR circuit is high for input conditions of equality.
- The inputs of an exclusive type IC cannot be locked out because all input logic states affect
the output state. - The outputs of an XOR and XNOR gate are complementary for identical XOR and XNOR
input states.