EE 231
Prelab 1: Introduction to the HCMOS Logic Family

In your CMOS data book, look at the section on the 74HC02 chip.

1. How many gates does it have ? ______________
2. How many inputs does each gate have ?_____________
3. If A and B are the inputs, and Y is the output. What is the Boolean expression for Y?
   Y = _____________________

By looking at the DC characteristics of the gates:

1. Define the parameter V_IH ___________________________
   ________________________________________________
2. Define the parameter V_IL ___________________________
   ________________________________________________
3. If V_CC = 5 V, what is the expected value of V_IH ? ______
4. If V_CC = 5 V, what is the expected value of V_IL ? ______

NOTE: A plot of V_CC vs V_IH/V_IL might be helpful for parts c. and d.