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SN74LVC1G123: Why SN74LVC1G123DCUR got top ic marking C23J but SN74LVC1G123DCUT dont have?

Part Number: SN74LVC1G123

Dear Suport,

Why SN74LVC1G123DCUR got top ic marking C23J but SN74LVC1G123DCUT dont have? Isn't that both are the same part except package order quantity? 

Any mistake on the datasheet.  

Best Rgds,

Felix