Z80 TRAP and CP/M - test-drb@ccmp.vtda.org

5 Apr 2006

actually it was the Intel bozos. Intel released the triple supply 
2708 then TI released their triple supply TMS2716. Intel released the 
2716 single supply and then TI was forced to create a single supply 
chip and they called it the TMS2516. I don't recall TI ever making a 
triple 2732 by the way(probably did, bit I don't remember). TI stuck 
with the 25xx designations because they did not want to confuse their 
earlier triple 2716.

best regards, Steve Thatcher
...
  (ref: IC Master
1982)
Presumably chosen by Mostek to be as close as possible to the MK385x, MK387x
F8 family numbers just to make the probability of confusing everyone as high
as possible. 
No, *that* distinction goes to the bozos at TI with their
non-2732, 2732 (IIRC).  So, if you wanted what the rest of
the world called a 2732, you had to order a 2532!  (IIRC, 3
power supplies on their 2732..?) 