# 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

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
5,151
1,266
You are right. It should be corrected. The I0 and I1 columns should be interchanged.