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TL331: TL331IDBVR Soldering issue for 2023 model

Part Number: TL331

Hi TI Team,

Thank you for your support.

One of our customer's having trouble for TL331IDBVR for 2023 date code model.

I think there is product change for the lead finish. NiPdAu to Matte Sn.

Customer said before 2023 model was absolutely fine.

The question is,

1. How to solve this issue? (Is there any technics? Must put Flux before  soldering or whatever)

2. Is there another soldering profile?

Can you give some advice?

Kind Regards,

Takashi