On Sun, 07 Aug 2011 20:35:20 +1000, Franc Zabkar
put finger to keyboard and composed:

My 1990 RS catalogue tells me that it's a TSC9400CJ ...

Datasheet for TC9400/TC9401/TC9402:
http://docs-europe.electrocomponents...6b8002b6d8.pdf

- Franc Zabkar
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