Pete Turnbull <pete at dunnington.plus.com> wrote:
It was used because there was a rad-hard
silicon-on-sapphire version,
and then some people used the standard versions so they could use the
same code and tools.
Up until just a few years ago (2002?), Harris/Intersil web pages listed the
SOS 1802 as a current product, along with more conventional CMOS 1802's
and support chips.
If I have the chronology right, Harris bought much of RCA's line in
the 90's and Intersil bought them out a few years later.
But they've been dropping a lot of classic parts (including the CA3046,
which I never believed would go out of style! There are newer
surface-mount differential pairs of course but not quite the same
as the good old CA3046 in a can...) Many of the hobbyist-oriented
retailers still have plenty of old stock though.
What 70's era micros are still in production? Z80, I'm sure. 8088, probably
(although probably not in an Intel fab.) Anything else?
If I look in the BG Micro or Jameco catalog I see lots of 70's era micros and
support chips but I'm sure that most of those parts are pulls or old stock.
Tim.