We bought 4500pcs STM32F071CBT6 , with datecode of 2118 & 2117, coo is Malaysia, but MSL on the label is MSL 2, is it correct ? Because we found official datasheet for this P/N is MSL 3. Could you please help explain why one p/n with two MSL ? Thank

[KChen.9]

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[KChen.9]

Anybody could help answer this question ?

[Imen.D]

Hello @KChen.9​ and weclome to the Community :)

I think the MSL level depends on the package, for example MSL level as per JEDEC J-STD-020 is considered to be 1 for all MCD WLCSPs.

For the package UFQFPN32 is qualified for MSL3.

Let me check back with the team for STM32F071CBT6 and I will be back to you as soon as I get an answer.

Imen

[KChen.9]

Hello Imen, thanks for your kind reply.

Please pay attention on the uploaded label photo of STM32F071CBT6 , the left one assembled in Malaysia marked MSL 2, but the right one assembled in Taiwan marked MSL 3. My question is that is it different coo with different standard on the MSL ? Or any other reason ? Are they functionally equivalent ?

Thank you.

[Imen.D]

Hello @KChen.9​ , @Community member​ ,

Sorry for the delayed reply on this, I was in long public holidays.

I confirm that they are equivalent functional.

But Not the same Bill of material for LQFP package:

• MSL2 shelf life after dry packing opening 1 year,
• MSL3 shelf life after dry packing opening 168hrs, as most of our MCD packages

@Community member​ , I escalated your request to involved people to add more visibilitybin the document.

Imen