i can't comment on the reliability issue (millmax makes pretty good
stuff i think)
but the high profile ones are sometimes larger around the perimeter even
though the lands are the same 'footprint'
i've seen significant differences in that dimension
we are using the 68p PLCC full profile thru hole
maybe 1000 pcs over the last 2 years and (knock on wood) have not seen
reliability issues
also you do have to be sure that your people push them down hard into
the socket, same with DIPs
the thermal cycling can make them walk out of their sockets
does pushing down fix the problems?
Dennis Saputelli
Lloyd Johnson wrote:
>
> 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.
>
> Are low profile sockets (Millmax 540-99-068-17-400200) less reliable than
> full height PLCC sockets? Or are PLCC sockets for larger parts just
> inherently a bad idea?
>
> This socket uses the same footprint as the PLCC part, so we can change to
> direct soldering the part in place if this is needed.
>
> Any thoughts would be appreciated.
>
> Lloyd Johnson, DSS
> Vista CA.
>
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