Last time, we talked about different types of digital logic gates. Now, let’s look at two of the most common digital ICs used today—CMOS and TTL.
We will learn about their electrical characteristics, including their input voltage and current, as well as their output.
To make it simple, we will do a simple experiment using two popular digital IC families: the SN74LS00 (TTL) and the CD4011 (CMOS).
We will learn how they work by measuring electrical characteristics with a regular multimeter. Then, compare the results with their datasheets.
The goal is to understand:
How much current can CMOS and TTL inputs withstand?
What load can we connect to their output?
Let’s explore it step by step—no special tools needed!
Read more: Understanding Input and Output of Digital ICs