Help, Stuck with 74ls147 Priority encoder

Discussion in 'The Projects Forum' started by kieran2326, Mar 11, 2010.

  1. kieran2326

    Thread Starter New Member

    Mar 11, 2010
    1
    0
    Have Been Stuck on this project, Need a 74Ls147, Unable to buy/find one in new Zealand, is there and equivalent? Please help any ideas where i might be able to find one? Thanks so much
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Have you tried looking for a 74HC147, or just a plain 74147, or an 74S147, etc?

    If you're connecting an HC up to the output of an LS, you may need to use pull-up resistors to match the logic levels.
     
  3. lightingman

    Senior Member

    Apr 19, 2007
    374
    22
    Hi,

    There is no direct equivalent. I have some 74HC147's, if you need a couple let me know.

    Daniel.
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,145
    1,791
    A CPLD or an FPGA is about the only alternative I can think of. Since it is a combinatorial circuit you should be able to develop the logic equations or the VHDL or Verilog needed to implement the function.
     
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