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TPSM82822A: TPSM828222/TPSM828222A Lead finish/Ball material

Part Number: TPSM82822A

Dear, support Team.

I have a question from our customer quality control department.


Why is the Lead finish/Ball material different between TPSM828222 and TPSM828222A?
TPSM828222 is ENEPIGA and TPSM828222 is NIPDAU.

https://www.ti.com/quality-reliability-packaging-download/report?opn=TPSM828222SILR
Assembly site
 EXT-mfg

https://www.ti.com/quality-reliability-packaging-download/report?opn=TPSM82822ASILR
Assembly site EXT-mfg

Best Regards,
Hiroaki Yuyama