Why wouldnt they use PROM's or OTP's?  Wouldn't those tend to have
longer lifetimes?

> I'm also thinking perhaps of some of these spacecraft (eg Voyager)
> that might have a very long life. Do they not use EPROMs of the
> day ? If so, what's to stop their programming just fading away - or
> are they not expected to retain it anyway and are simply space junk
> with some transmitting capability ? Do they have special long-
> retention NASA cells ?

Other than that IDK.

andrew

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