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Connecting NC labled pins question.

Discussion in 'Electronic Design' started by Steven Hayter, May 17, 2004.

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  1. I was wondering what the recommend practice is for pins labeled NC, and
    for pins marked as reserved for future use when operating in the 66 to
    200 MHz range?

    Sorry there's not much more detail, first post of this didn't go though
    properly.
     
  2. Tim Wescott

    Tim Wescott Guest

    Some manufacturers label pins "NC" when they really mean "connect these
    and you'll be sorry". Even if they're truly not connected you have no
    idea what _will_ be connected there in the future unless it's a standard
    package.

    I leave NC pins just that, maybe stubbed off with the very shortest
    possible trace to a via for later board mods.
     
  3. John Larkin

    John Larkin Guest

    Don't connect anything to them.

    John
     
  4. Thanks, *goes back to wiring up this rather nasty routing problem with a
    few less pins to worry about :)*
     
  5. Terry Given

    Terry Given Guest

    Occassionally the manufacturer will tell you useful things, generally along
    the lines of:

    1) do not use, reserved for future use/factory test etc - dont connect to
    these pins

    2) not internally connected - do what you like, but beware component
    changes/"substitute" vendors parts etc.

    most commonly, the manufacturer tells you nothing at all, other than the
    "NC" label. connect these at your own risk.

    Terry
     
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