At 7:06 AM +0200 9/13/05, Poul-Henning Kamp wrote:
In message <[EMAIL PROTECTED]>, David Forbes writes:
These EECL chips are indeed odd beasts. No data via Google; not in
the Motorola book from 1980; I'd guess that this is a completely
in-house logic family.
I don't think that conclusion is justified, ECL logic was always
rather special beasts and they were largely superseeded by
CMOS by the time the Internet started.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
Paul,
I reached that conclusion based on the fact that there is no
manufacturer or part number given for these chips in the 5370B manual
other than HP. The 10K ECL chips in the 5370B parts list are cross
referenced to their Motorola part numbers. The ECL 10K and 100K
series was produced by several companies; this EECL appears to be
unique to HP.
Has anyone on this list ever heard of EECL logic used anywhere
besides HP test equipment? I hadn't heard of it *at all* before
today, and I've been designing high speed digital stuff for over 25
years.
--
--David Forbes, Tucson, AZ
http://www.cathodecorner.com/
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