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Strange IC dimensions

Discussion in 'Electronic Components' started by Arild P., Jul 3, 2006.

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  1. Arild P.

    Arild P. Guest

    I have this IC which needs socketing, but according to all my catalogs
    and resources it doesn't have the standard dimensions. Is this so, and
    if yes -which IC socket should I be looking for?

    It's a 28 pin IC from Texas instruments (TMC-0281) and I measure approx
    10.5mm between the two rows.
    Each row (14 pins) is approx 23mm (measuring from pin 1 to pin 14, or
    15 to 28).
  2. Tilmann Reh

    Tilmann Reh Guest

    This is probably a so-called "Shrink DIP" package, 70 mil pitch and 400
    mil between rows.

    It will be hard to get a socket for those...
  3. Arild P.

    Arild P. Guest

    Bummer :-(
    Failing that I get an IC socket, are there other solutions?
    I remember having used some sort of rolls of metal "IC legs" that you
    cut off in say, 14 pins (for use with a 28 pin IC), insert it into one
    of the rows in the PCB, solder it in place, then bend off and remove
    the top part which keeps them together.
    I have no idea what its called (hence the lengthy explanation), but
    given the closer proximity of each IC leg with the abovementioned IC,
    those legs might be too wide and end up touching each other, or would
    it work?
    Other suggestions?
  4. Tilmann Reh

    Tilmann Reh Guest

    There were sockets (milled precision ones) for the 64-pin shrink DIP
    available (for the HD64180 or Z180, for example). It has the same pitch.
    Maybe you can get one of those, cut it, and use segments of the
    resulting strips.
  5. 1.778 mm pitch (shrink DIP) production sockets are available from

    For test sockets, use Yamaichi.

    Best regards,
    Spehro Pefhany
  6. DigiKey has them:

  7. Tilmann Reh

    Tilmann Reh Guest

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