How to Use Two Enable Inputs in a Challenging Decoder Question?

[tonald]

I have no idea about how to use two "enable inputs". (the second part of the question)

 

[berkeman]

I have no idea about how to use two "enable inputs". (the second part of the question)

When neither of the enable inputs is asserted, all of the outputs are disabled.

 

[Wo0p]

If you're stuck on implementation, I advise you to study the 74LS137 3-to-8 decoder :)

 

[berkeman]

If you're stuck on implementation, I advise you to study the 74LS137 3-to-8 decoder :)

Actually, since the question doesn't require address latches, it might be easier for them to study the 74xx138 IC. Good suggestion, though.

(xx = HC, AC, LS, whatever).

 

[Wo0p]

berkeman: you're quite right, ty