Multiplexer Truth Table Correction

Discussion in 'Feedback and Suggestions' started by IronMod, Mar 11, 2012.

  1. IronMod

    Thread Starter New Member

    Jun 14, 2011
    15
    3
    http://www.allaboutcircuits.com/vol_4/chpt_9/7.html

    I am not sure if I did not see something correctly, but I believe the truth table for this section is incorrect. The logic equation for a 2-to-1 MUX is:

    D=XA' + YA

    Therefore, the truth table should be constructed as:

    Y X A D
    0 0 0 0
    0 0 1 0
    0 1 0 1
    0 1 1 0
    1 0 0 0
    1 0 1 1
    1 1 0 1
    1 1 1 1

    I apologize in advance if I am incorrect, but this was referenced directly out of my Fundamentals of Logic Design textbook.
     
  2. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    You are right. It should be corrected. The I0 and I1 columns should be interchanged.
     
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