[sebhc] The 8-bit Runt of the Litter: ET-3400
Dwight K. Elvey
dwight.elvey at amd.com
Tue Sep 7 20:08:33 CDT 2004
>From: "Barry Watzman" <Watzman at neo.rr.com>
>It may be important that you replace it with the same general type of diode,
>silicon with silicon, germanium with germanium. But that's not an issue,
>there are hundreds if not thousands of diodes of each type (why???). So,
I'd often wondered why myself. A 1N4148 is spec by spec
identical with a 1N914. I looked into this and found that
the difference was in the process used to create the diode.
Both have the same PIV, max current, reverse biased capacitance
and what ever. I suspect that I'd been just as happy if they
sold the newer part under the old number but maybe there
is something like life expectancy or something that I missed.
It does make it fun for the engineer that has to choose which
one to put in the next circuit.
Under a microscope, you'd see they were made differently. In
a circuit, you'd never know.
>within that context, and PIV and current capacity, almost anything should
>work unless it's a very unusual and critical application.
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