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CD74HC573: What's the correct part number for printing HC573 please?

Part Number: CD74HC573

Hi there,

Good afternoon.

My issue is this factory told they need CD74HC573M, I bought some CD74HC573M96 for them, as I learnt the suffix 96 is only packaging, nothing to do with function.

Now factory told they can not put these material on board to assemble, the pacakge is not matched. 

So I double checked the part I bought from Mouser, found the printing for part CD74HC573M is "HC573M", but the picture sent by factory the true part needed has the top marking "HC573".

Which means I was asked to buy wrong material for them, but I cannot find the correct complete TI P/N with the printing "HC573".

Any advise pls? Attached the pictures for different printing items.

Thank you!!