7483a adders

Discussion in 'The Projects Forum' started by pabman, Oct 27, 2009.

  1. pabman

    Thread Starter New Member

    Oct 27, 2009
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    Can anyone please show me how can I cascade two 7483A adders to add two 8-bit numbers?:confused:
     
  2. SgtWookie

    Expert

    Jul 17, 2007
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    7483A's? Wow, a blast from the past. Back in 1976, TI was recommending 74283's instead due to the 283's power pins located on the corners.

    This sounds like a homework assignment from an instructor/teacher/professor. Is it?
     
  3. pabman

    Thread Starter New Member

    Oct 27, 2009
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    Sgt Wookie:
    Yes it's actually a lab in my CS 141 class. My instructor is out sick and the sub does not have a clue. I already built and tested a 4-bit binary to Excess-3 code converter. But I am confused as to how can I cascade TWO 7483A adders to add two 8-bit numbers.
    I would appreciate your help.
    Pabman
     
  4. SgtWookie

    Expert

    Jul 17, 2007
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    OK, I can't do it FOR you. But if you're really stuck, we can help.

    Note that the 7483A has "Carry In" (pin 13) and "Carry Out" (pin 14).

    How do you think you might connect the inputs and outputs of that IC?

    Do you have a schematic created that you can post?
    .png format is preferred. .jpg images are too "lossy"; they lose much detail. .PDF format takes too long to load up.
     
  5. pabman

    Thread Starter New Member

    Oct 27, 2009
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    Thanks I got it. It was really simple.
     
  6. SgtWookie

    Expert

    Jul 17, 2007
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    It can be a bit sticky the way some of the manufacturers name those pins. For example, TI called them "C0" and C4" instead of "Carry In" and "Carry Out".
     
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