[H-GEN] Mr. Chips

David Wood dwood at plugged.net.au
Fri Apr 2 18:49:21 EST 1999


(Note reply-to: being general at humbug.org.au vs David Wood <dwood at plugged.net.au>)

Hi all,

You know, most DIP-style chips have a notch at one end.  This notch
indicates the side of the chip that pin 1 is on.  Sometimes a small
circular depression or a raised dot is used instead of a notch.  Most chip
sockets have a matching notch, depression or dot to note which way a chip
should be installed.

If one were, say, to forget all of the above and presume that a given
socket is installed on a board in the same orientation as all of the other
chips (never a good idea), one might put a chip in upside down.  If this
were done with (hypothetically) a bootp chip and a 3c509 card, not only
will the chip literally smoke, but it will toast the card as well.

Go ahead.  Ask me how I know.

Grrrrr.
Dave 'Useless EE Degree' Wood
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