Failed ICs and components

Brent Hilpert hilpert at
Thu Feb 12 17:30:41 CST 2015

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.

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