TPS3813: Difference between TPS3813K33DBVR and TPS3813K33DBVT

Part Number: TPS3813

Tool/software:

Hi TI colleague,

Last two years our factory volumed used TPS3813K33DBVT as power watch-dog and no problem; but this month our factory began to use TPS3813K33DBVR, find that 10PCS of 57PCS were failed, FPY is only 82%.

 

Attachment are two IC's photos, round tag is TPS3813K33DBVR.

The factory now stopped due to high failure rate, could you help to have a quick investigation on this?

Thank you very much in advance!

Best regards,

Jianmin