Multiple choice

How many selection lines are required for 8 to 1 multiplexer?

  1. 1

  2. 2

  3. 3

  4. None of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A multiplexer is a circuit with many inputs but only one output. For MUX with n inputs, there must at least m control signals where 2m = n, where n = 8, therfore m = 3, 23 = 8 (8x1 MUX) 8 to 1 multiplexer have 3 selection line(s0 ,  s1 and  s2 ), 8 input lines and 1 output. 

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