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SN74CBTD1G125: SN74CBTD1G125DBVR part marking.

Part Number: SN74CBTD1G125

Will be glad if anybody can explain what means P25S marking on SN74CBTD1G125DBVR item.
I've seen that can be only P25J or P25R marking.
Hope that Digi-Key did not sell me counterfeit. Also i've seen P252 marking. It seems that last symbol is factory code, but i still not find exact decoding.