did you had a look at the chip ? does it have a stamp that identifies it?
companies such as RS break up parts and repackage. maybe they made a mistake?
and what also happens : a part can get the wrong stamp. but it does not explain why the board does not work.
you can send a board to me so i can check it. there must be a simple explanation.
also : when buying parts from china, there is a lot of fake. I know mouser.com has certificates so you know you buy genuine parts.
i remember the days where memory chips were expensive and there were many fake parts.
but i feel for your case there must be a simpler explanation.
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