14 Jul
2006
14 Jul
'06
10:41 a.m.
At 09:08 AM 7/14/2006 -0400, you wrote:
Tom Uban wrote:
I would have thought that too except that the numbers are TI SN72XXXN
series parts with a date code too. Here are a couple of board pictures:
http://www.ubanproductions.com/Images/board1.jpg
http://www.ubanproductions.com/Images/board2.jpg
I will see if I can get a better list of part numbers later today.
--tom
I have a friend who is cleaning out his basement
and has
some boards which have a number of 72XX, 73XX, and 74XX
parts on them. I'm not familiar with the 72 and 73, but
I'm guessing they are unobtainium at this point.
Most likely they are date codes, especially if "XX" is never greater
than 52 :-).
There are some signetics and TI and NatSemi line driver/receiver parts
with 72xx and 73xx part numbers, though.
Tim. 
