4 bit comparator..help

Discussion in 'Homework Help' started by nitro604, Mar 28, 2005.

  1. nitro604

    Thread Starter New Member

    Mar 28, 2005
    1
    0
    Hi, im new

    i need help figuring out what goes on in a 4 bit comparator chip, the 74LS85 chip.
    i need to know what gates are used.

    thanx
     
  2. google.com

    New Member

    Mar 27, 2005
    4
    0
    Try and find Motorola's TTL Data Book. It should be online somewhere (I have the PDF here -- it's ~8mb). Attached is the logic diagram & truth table for the 74LS85 from the book. Also attached is the pinout for the logic symbols they use (ie, which pin is A3, A2, etc.). Hope it helps.
     
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