At 10:30 PM 6/13/99 -0500, you wrote:
>Has anyone run across a comprehensive reference (online preferred, of
>course) of recommended PCB footprints for surface mount packages?  We will
>be doing a board with TSOP, QFP (or TQFP), SOIC, and various other
>itsy-bitty packages, and the board layout software is old enough that it
>doesn't have these patterns in the vendor-supplied library.

I was sent a hard-copy set by another PIC consultant in San Diego several
years ago--don't know where he got them, but assume they were from a
standard of some sort.  Might see of one of the magazines like Printed
Circuit Board Layout can get you a reference.

Also NATIONAL SEMI has a book dedicated to "Packaging"--get a copy--it
should all be in there!

Kelly

****************************************************************************
********
All legitimate attachments to this email will be clearly identified in the
text.
William K. Borsum, P.E.
OEM Dataloggers and Instrumentation Systems
<borsum@dascor.com> & <www.dascor.com>