Failed ICs and components

Ian S. King isking at
Fri Feb 13 19:26:06 CST 2015

Exactly why I argued for the retention of replaced parts at LCM.  <sigh>

On Thu, Feb 12, 2015 at 3:30 PM, Brent Hilpert <hilpert at> wrote:

> On 2015-Feb-12, at 12:49 PM, Chuck Guzis wrote:
> > On 02/12/2015 11:51 AM, Kyle Owen wrote:
> >
> >> Darn! That sounded like a good collection. Alas, I know I haven't kept
> >> every bad IC either (except that one from the PDP-8/E...not really sure
> why
> >> until now, I guess). But if you do find them, I could certainly use
> them.
> >
> >
> > Just curious--has anyone ever done a life-cycle study on
> plastic-packaged vs. CerDIP packaged SSI TTL?
> Well, just a data point, but I've never had to replace an IC in my ca-1970
> HP2116, composed of hundreds of SSI chips, 80-90%of which are CerDIP.
> They're mostly CTµL, with some TTL, however.
> (It's had one quad-pack core driver transistor failure.)
> For that age and number of ICs, that's pretty good. Contrast even with
> other HP equipment.

Ian S. King, MSIS, MSCS
Ph.D. Candidate
The Information School
University of Washington

An optimist sees a glass half full. A pessimist sees it half empty. An
engineer sees it twice as large as it needs to be.

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