None of that would help with in-house numbers, which are exclusive to the company that orders them.
No, thats not the case at all. They were used both for specific customer and for special screens
for broader customer base. Usually not catalog based, rather specific requirements, various
customers, dug up by FAEs in the field. We sometimes shipped to the mark, other times remarked
with customer part number. Or something in between. That being said as the discrete industry
evolved less off spec screening was being done, and the marking systems exploded to the point
no one wanted to deal with them, unless GP margin was stratospheric and/or volumes. My
comments based on being a production EE at NSC with a periodic relationship to Gus Mellick
who ran the discrete applications effort. And later as FAE for Boston region.
"supposed equivalents", yes, we had those tables which were distributed to end customers, and they
were encouraged to do the investigation and qualification for the "supposed equivalents" that they
would choose and be responsible for. Tables were simply guides to help design EE to choose what
to examine.
Regards, Dana.