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Challenging decoder question

  1. Dec 20, 2009 #1
    I have no idea about how to use two "enable inputs". (the second part of the question)
     

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  3. Dec 21, 2009 #2

    berkeman

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    Staff: Mentor

    When neither of the enable inputs is asserted, all of the outputs are disabled.
     
  4. Dec 21, 2009 #3
    If you're stuck on implementation, I advise you to study the 74LS137 3-to-8 decoder :)
     
  5. Dec 21, 2009 #4

    berkeman

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    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).
     
  6. Dec 22, 2009 #5
    berkeman: you're quite right, ty
     
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