Experiment 2 - The 4-to-1 Multiplexer

The 4-to1 multiplexer has four inputs (IN0, IN1, IN2 and IN3) as well as two selector inputs (A and B). With the selector inputs you switch one of the inputs to the output (OUT)...

Take a look at the truth table of a 4-to1 multiplexer...

With a few logic gates you build the 4-to-1 multiplexer...

Circuit diagram 4-to-1 multiplexer.

You understand the functionality of a 4-to-1 multiplexer easily with a switch analogy...

Illustration switch analogy 4-to-1 multiplexer.

Circuit symbol 4-to-1 multiplexer.

With the circuit shown you build the 4-to-1 multiplexer...

Circuit 4-to-1 multiplexer. (Enlarge)

4 input multiplexer often described as 4-to-1 MUX.

In the next experiment you take a look at demultiplexer...