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Old 5th May 2019, 8:06 pm   #3
evingar
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Join Date: Oct 2003
Location: Newbury, Berkshire, UK.
Posts: 1,690
Default Re: Rank clock radio ic chip problem

The chip type is going to be on the top surface. What you are seeing is probably a batch number.
It maybe that the chip type has been purposely removed to protect the IP - I have seen this done on some designs. Most likley though, it has just faded or was badly marked from new. Occasionally it is possible to make faded idents temporarily visible by wiping some IP over the surface of the chip
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