FreeLists / si-list / [SI-LIST] Re: EISA EDGE CONNECTOR

["Andrew Ingraham" <a.ingraham@xxxxxxxx>]

> I am designing a board which is a ADD-ON card in EISA slot.
> Can anybody of you help me out for the mechanical details for the
> fingers on the ADD-ON card.
> I want the details for the pad size, pitch (distance between two
> consecutive pads), pad thickness for the ADD-ON card.

About all I can tell you is that each side of the board has two rows (upper
and lower) of finger pins, and that the pad pitch is 0.1 inches within each
row.  The two rows are interleaved so that traces to the lower row run
betweeen the upper row pads.  ISA (pre-EISA) cards have just the upper row.
ISA cards can plug into an EISA slot.

The official EISA spec was available from Global Engineering Services (for a
fee), but it appears that it is no longer in print.  I had access to a copy,
years ago, which I recall was rather thin in the area of electrical and
mechanical details.  In those days, I suspect, details like pad thickness
were not always specified (though I don't know if it's true in this case).

I thought at one time there were some unofficial on-line sites that had key
electrical and mechanical details, but I can no longer find them.

The books by Annabooks (Ed Solari) and Mindshare (Tom Shanley) might be some
of the only remaining references on this subject.  Not truly authoritative,
but about the best you can still find.

Regards,
Andy


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