72XX, 73XX, and 74XX logic boards

[Tom Uban]

At 09:08 AM 7/14/2006 -0400, you wrote:

>Tom Uban wrote:
> > 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.

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