Multiplexer Truth Table Correction

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

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  1. 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.
     
    #1 Reply
  2. Mar 11, 2012 #2
    Georacer

    Moderator

    Nov 25, 2009
    5,151
    1,271
    You are right. It should be corrected. The I0 and I1 columns should be interchanged.
     
    #2 Reply
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