What logic function could I build this with ?

Discussion in 'General Electronics Chat' started by ARMDeveloper, Aug 16, 2007.

  1. ARMDeveloper

    Thread Starter New Member

    Aug 16, 2007
    8
    0
    I am looking for a logic IC that has 3 inputs and 4 outputs as follows:

    Input1 Input2 Input3Out1 Out2 Out3 Out4
    0xx 0000
    100 0000
    101 1001
    110 0110
    111 0011

    How could I build this ?

    What if I used only some of the pins of an LED hex driver ? Input1 is actually a clock signal that has to run at about 100KHz.
     
  2. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
    No one IC will do it I think. You'd either need discrete ic's or a microcontroller.
    100khz is no big deal.
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Shouldn't the title be more like "what could I build this logic function with?"?

    Once you've got it, then what?
     
  4. ARMDeveloper

    Thread Starter New Member

    Aug 16, 2007
    8
    0
    An ARM micro drives this circuit. It would take too many pins to implement directly with it. Maybe I will change the design though. I don't feel like putting a bunch of discretes on the board.
     
  5. Papabravo

    Expert

    Feb 24, 2006
    10,177
    1,799
    Any garden variety PAL will do the trick. I keep a stock of GAL22V10 for just such a case. You could probably do it with a smaller PAL but they might be hard to find.
     
  6. Gadget

    Distinguished Member

    Jan 10, 2006
    613
    0
    What about programming a PROM to do the job..?
     
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