Can anybody tell me which IC is this?

Ramussons

Joined May 3, 2013
1,567
Maybe a part of the Invertor section - PIC 1F 72. ???
There are a few 28 pin IC's in the Invertor range, you will have to sketch the schematic and tally with the data sheet.

Google for "28 pin Invertor IC's"
 
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