Did I implement this function with a MUX correctly?

Question

I have this truth table:

enter image description here

Which gives this SOP

y = A'B'C + A'BC' + AB'C' + ABC

I tried to use a MUX with 2 selects and 4 inputs and I got this (using A and B as the selectors):

enter image description here

I'm pretty sure it's correct because when I light up A, B and C according to the truth table I get the right value for Y but I just want to make sure.

• user103380: First of all, have you checked the datasheet for this chip? Secondly, it's hard to understand what you're trying to do. A MUX device is supposed to stream a serial output of bits depending on the data selection you assign. I really don't think you're using this MUX for its intended purpose.
• Segmentation fault: @KingDuken I have. It's a multiplexer. D0-D7 are inputs, A,B and C are selector, with A being the least significant one. Y and W are outputs, S is enable. What I am trying to do is use a mux to implement that SOP. Or at least that's what my professor wants us to do.
• jonk: @SilenceOnTheWire Well, your circuit does what you are supposed to make it do. So, that's good!
• jonk: @SilenceOnTheWire Also looks like you are using Neemann's Digital. Good!! That's the best available for things like this, right now. You should add in test vectors to your schematic. That way, you have automatic verification.
• jonk: @SilenceOnTheWire This screen capture shows what I mean. Digital makes it very easy to add this feature. All eight of those text vector lines could also be replaced with just one line: "repeat(8) bits(3,n) (((n>>2)+((n>>1)&1)+(n&1))&1)".

Answer 1

y = A'B'C + A'BC' + AB'C' + ABC

Given enter image description here to implement with 8:1 mux. with 3 address inputs.

y=1 ABC
 001 = d1 =>"1"
 010 = d2 =>"1" 
 100 = d4 =>"1"
 111 = d7 =>"1"
y = 0 for d0=d3=d5=d6="0" 

Answer 2

That looks like a correct implementation of the 3-bit parity function to me.

you've used an 8:1 mux instead of 4:1, but as you're only using 2 of the address lines I guess that's ok.

As jstola says writing it in logic diagrams instead of wiring may be preferred.

Answer 3

This is not an answer.

Please get accustomed to using logic symbols instead of using a wiring diagram as you have in your question.

It will make your life easier when the circuits get more complicated.

Here is a random example from the web.

enter image description here