[SI-LIST] Re: replacing ECL ??

ECL was proclaimed a doomed if not dead technology for each of the last
three decades.

Yet somehow it has survived.

I would hesitate to call it dead just yet, given its apparent resiliency
in spite of the odds and the nay-sayers.  It might be gone tomorrow, or
it might continue to fill a niche for certain kinds of applications,
like yours.

If you have a very early ECL application note, I have some ancient ECL
data books somewhere, with data sheet specs that are very optimistic
compared to what they were only a year or two later.  My guess is they
didn't have a good handle on their IC process yet at the time they
printed the earlier data book, so the specs were extrapolated from some
engineering samples, perhaps combined with a very heavy hand from the
marketing department.  If they used the word "Preliminary," it wasn't a
watermark or a large font size to make it obvious.

In general, though, many application notes seem to be written to give
you ideas to go on, rather than proven designs.  You still need to do
your homework to prove to yourself that it will work at the speed you
want, regardless of the technology.

Regards,
Andy


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