Multiple choice

A multiplexer with a 4-bit data select input is a

  1. 4 : 1 multiplexer

  2. 2 : 1 multiplexer

  3. 16 : 1 multiplexer

  4. 8 : 1 multiplexer

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A multiplexer with n select lines can choose among 2^n input lines. With 4 select lines, the maximum number of inputs is 2^4 = 16, making it a 16:1 multiplexer. A 4:1 MUX needs 2 select lines, and an 8:1 MUX needs 3 select lines.