10 May
2001
10 May
'01
11:25 a.m.
And before 10k ECL there was 1K ECL. A bunch of this was
used on a content-addressable memory on a computer I used
(and it was old then) back in the early 70s. The computer
(Nebula) was built by students (under an ONR contract) in
the late 60s at Oregon State University.
I still have some of the parts somewhere... The CAM used
basic nand/nor logic elements in ceramic flat-packs and
14 pin dips. Parts were hand-selected to be sub 3ns gate
delays (if memory serves) as the stated prop delays were
a bit higher than that.
Stuff ran HOT! And needed several weird power supplies
(at least weird with respect to common 5v stuff of the
time.)
-Gary
At 21:07 5/10/2001 +0100, you wrote:
http://www.semtech.com/pdf/ate/ecl_dc_specs.pdf
Its rather new High speed low noise logic.
As is well known here, I can't read .pdf files, but if they are claiming
that ECL is a modern logic family, then I have to disagree.
I am pretty sure 10K ECL was available in the early 1970s, and there was
an earlier series (300 series) before that.
Heck, I was designing with ECL (10K and 100K) 10 years ago, and it wasn't
new then.
-tony