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SN74AXC4T774-Q1: naming convention

Part Number: SN74AXC4T774-Q1

Hi Team, 

Good day. I am posting this inquiry on behalf of the customer.

This part has 3 Orderable Device Numbers

CAXC4T774QBQBRQ1

CAXC4T774QRSVRQ1

SN74AXC4T774QPWRQ1

 

I haven't seen this convention on other TI parts yet used for the first 2 Orderable Device numbers listed above are these typos that made their way all the way through the system?

 

Was expecting those numbers to be 

SN74AXC4T774QRSVRQ1

SN74AXC4T774QBQBRQ1

 

If this is some normal convention are those numbers temporary like when the part is pre-release there's usually a "P" prefix in the orderable device number until the part is released?

Please help to advise. Thank you for extending your support.

Kind regards, 

Marvin