Early EPROMs with inconsistent pinouts?

[TTL]

I've heard that some early EPROMs had inconsistent pinouts (different manufacturers had different pinouts despite the same model).
Is this correct, and if so -which EPROMs and manufacturers are we talking about? 2716? 2732? 2764?

 

[Harald Kapp]

some early EPROMs had inconsistent pinouts

Maybe very early ones. The typical pinouts were standardized by Jedec and are fairly consistent (apart from a few specialties e.g. /PGM which are easily handled.

 

[TTL]

Thanks for the pinout link.
I think I figured it out from this and this link as well as the above pinout diagram which confirms it:

It appears that Texas Instruments' TMS-2716 is the one with the different pinout from the industry standardized 2716 chips from all other manufacturers. They did however eventually come out with the TMS-2516 which is the same thing as a standardized 2716.

When it comes to the 2732 I read that Texas Instruments never made one, but designed their own version of it called the TMS-2532, but unlike the TMS-2516, this one is NOT compatible with standard 2732 chips! TI sure messed up big time!!
So concluding:

TI TMS-2716: NOT compatible with standard 2716 EPROMs
TI TMS-2516: compatible with standard 2716 EPROMs
TI TMS-2532: NOT compatible with standard 2732 EPROMs

Moral of the story: stay away from TI EPROMs for pin-pin compatibility across brand names.