> This may be slightly off topic, but we are beginning to have
> occasional problems with the reliability of the connections between a
> 68 pin low profile PLCC socket and a 68 pin IC package.

I don't know how applicable it is to your situation but there are a 
couple of things that I have learnt. 
PLCC sockets don't cope well with multiple insertions. The 
contacts seem to fatigue quite quickly and loose contact pressure.
Related to the above is poking a scope probe between the chip and 
the contact.
I've often seen the bottom of the socket snipped out so the part can 
be hand soldered in prototype boards. When you put the chip into 
the socket, it drops down too far and the peak of the contact sits 
above the pin so that it still makes contact but with much less 
force. 

Steve.

======================================================
Steve Baldwin                Electronic Product Design
TLA Microsystems Ltd         Microcontroller Specialists
PO Box 15-680, New Lynn      http://www.tla.co.nz
Auckland, New Zealand        ph  +64 9 820-2221
email: [EMAIL PROTECTED]      fax +64 9 820-1929
======================================================

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