[time-nuts] HP Cesium Standards in the International Atomic Time Scale, the legend of Felix Lazarus, and the "top cover
Hal Murray
hmurray at megapathdsl.net
Mon Dec 24 06:59:22 UTC 2018
jimlux at earthlink.net said:
> and the "market lifetime" of parts today is much shorter. There are lots of
> parts from Hittite that were essentially "run on this line only", and when
> they moved geometries, they're never to be seen again.
Most vendors make a lot of noise before they pull the plug on a part. The
usual deal is that they fill all orders placed by a specified date - lifetime
buy. Distributors typically send a note to anybody who has purchased them, or
maybe only purchased significant quantities.
If a part isn't expensive, you can afford to buy extras beyond what you expect
to need to cover some what-ifs. That probably doesn't cover something like
the 5071 being in production for 30 years. But it could give you a few years
warning - maybe enough time to find a substitute and/or redesign that section.
--
These are my opinions. I hate spam.
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