Question

Which IC is used for the implementation of 1-to-16 DEMUX?

• A. IC 74154
• B. IC 74155
• C. IC 74139
• D. IC 74138

Hint:

Use IC 74154 for 1-to-16 DEMUX. It uses 4 select lines and gives 16 outputs.

Answer 1

The Correct Option is A

Step 1: A DEMUX (Demultiplexer) takes a single input and routes it to one of many outputs based on select lines.
Step 2: 1-to-16 DEMUX requires 4 select lines \((2^4 = 16)\)
Step 3: IC 74154 is a standard TTL chip that:
Implements 1-to-16 demultiplexing.
Has 4 select inputs and 16 active-low outputs. Therefore, IC 74154 is the correct choice.