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Anyone have pinout of 74118 TTL chip?

Discussion in 'Electronic Repair' started by Matt J. McCullar, Aug 27, 2004.

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  1. Our old Texas Instruments just hop right over the number SN74118, yet we
    have this chip right in front of us. A web search indicates it's some sort
    of RS latch, but we cannot find the pinout for testing purposes. Any help
    would be greatly appreciated.

    Thanks!

    Matt J. McCullar
    Arlington, TX
     
  2. Rich.Andrews

    Rich.Andrews Guest

    Matt,

    I think this may give you a clue.

    part 74118 : default dil16 {
    newattr "$comment" = "Hex Set-Reset Latch" ;
    pin (res,s1,q1,s2,q2,s3,q3,s4,q4,s5,q5,s6,q6) ;
    net "vss" : (8) ;
    net "vcc" : (16) ;
    xlat (res,s1,q1,s2,q2,s3,q3,s4,q4,s5,q5,s6,q6)
    to ( 9, 1, 2, 4, 3, 6, 5,10,11,12,13,15,14) ;
    swap ( [ 9,
    ( 1, 2),
    ( 4, 3),
    ( 6, 5),
    (10,11),
    (12,13),
    (15,14) ] ) ;
    }


    r
     
  3. Thanks! Problem is, I'm not certain what all of that means, particulary the
    "swap" command. Does that mean I have to re-arrange the pinout definitions
    in the previous line, or something? I'm not a programmer, unfortunately.
     
  4. El Meda

    El Meda Guest



    q6 s5 s4
    s6 q5 q4
    Vcc res
    | | | | | | | |
    o_o_o_o o_o_o_o
    | 74118 |
    | _ _ _ _ _ _ |
    o o o o o o o o
    | | | | | | | |
    Vss
    s1 q2 q3
    q1 s2 s3

    .-----------.
    | |
    S ----- |
    | --- Q
    | |
    | |
    Res ----- |
    | |
    (Common to all 6) '-----------'

    Created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de
     
  5. WDino

    WDino Guest

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