DIP packages (was Re: Help resurrect my Xerox Alto)
eric at brouhaha.com
Tue Sep 21 20:29:11 CDT 2010
Brent Hilpert wrote:
> Well, if you can't find a (reasonably-priced) 14-pinner, the pinout
> of the 8 and 14-pin DIP versions are the same, so an 8-pin is a drop-in
> replacement for the the 14-pin.
> Begs the question of why the 14-pin version was ever produced,
> machine insertion/handling perhaps.
Perhaps. Also the 14-pin DIP was probably invented and standardized
(TO-116) several years before the 8-pin DIP. The 14-pin DIP appears to
date back to 1965 or earlier. I don't have any information suggesting
when the 8-pin DIP appeared. Was the μA709 the first monolithic op-amp
offered in a DIP package? The earlier μA702 was available in a 14-pin
DIP by 1976, but I don't think it was offered in a DIP at its introduction.
Fairchild had one part that was in a 36-pin DIP in 1969. I've never seen
that used for any other part.
Early on (late 1960s, early-to-mid 1970s), some of the Japanese
semiconductor vendors such as NEC seemed to like the 42-pin DIP.
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