Equivalent(cheaper)4PDT IC to replace MC14551B

Discussion in 'The Projects Forum' started by bigsanta11, Oct 5, 2010.

  1. bigsanta11

    Thread Starter Member

    Feb 6, 2008
    14
    0
    I've came a cross a UK website which is quite close to me and i just need some advice before i put my order in.

    Based off the diagram below,they stock the exact same series 4551 ICs,but for cheapness ,i would prefer to bulk order some other ,cheaper Equivalent ICs ,not the tiny surface mount ones ,but any which will act act like the 4551's quad 4PDT action.Or if there is something which can do the same with just one IC that would be even better.:D

    Being a new fan of electronics ,can't a logic gate/s be used instead (dl logic)?.

    I was thinking of removing the SPDT switch completely and maybe just using a small SPST 6mm push button, connected to a 555 bistable which goes to the 4551.

    http://uk.rs-online.com/web/search/...Discon_uk:N)&Ns=I18NPrc1_uk&N=4294611702&No=0


    [​IMG]
     
    Last edited: Oct 5, 2010
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Try looking at 74HC157's; 74AHC157's, etc.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,638
    2,343
    Hello,

    The MC14551 is a bi-directional analog switch.

    [​IMG]

    If the switched signals are analog the 74HC157 will not work.
    If the signals are digital it will work (uni-directional).

    [​IMG]

    Bertus
     
    Last edited: Oct 6, 2010
  4. bigsanta11

    Thread Starter Member

    Feb 6, 2008
    14
    0
    On further investigation ,i received this bit of info.

     
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