Michael,
For several years in the 70's I worked in the Semiconductor division at
TI, involved in final testing of consumer circuits. Most of the
products that were done to a specific requirement of a customer were
symbolized with the number that they wanted rather than any industry
standard component. This may be the case here.
However, if you can remove the device, there may be another symbol on
the bottom that is more identifiable. I still have a number of data
books from that stint and if you can give me some more details on the
packaging and anything else that may help, I can look and see if I can
identify it.
Regards,
Joe
P.S. The 7223 is indeed a data code (week 23 of 1972)
Michael Syré wrote:
>
> Hi,
>
> I've got an old Smiths RevCounter at the TechnoClassica in Essen, Germany.
> I think, there is an damaged IC in it.
> It is a TexasInstruments part and signed with the TI-logo and:
>
> MICI
> 2/C
> and crosswise 7223 (maybe the 23. week of 1972???).
>
> On the inside there is stamped 810P
> The RevCounter was produced for BritishLeyland's Triumph Spitfire(?).
>
> I need a new IC to use the RevCounter in my new(old) '73 Mini 1000 and
> hope, you will be able to help me.
>
> Best regards
> Michael Syré
>
> 72TR6 U1267 sapphire-blue
> 73Mini1000 tuscan-blue
--
"If you can't excel with talent, triumph with effort."
-- Dave Weinbaum in National Enquirer
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