ST25R3911B-AQFT different COO with different package outline

[Selena]

Dear Sir, 

ST25R3911B-AQFT, we have noticed that the QFN32 package is different for COO=KR and COO=TH parts, referring to photos attached, is this normal?

Is there any updated datasheet or PCN information to reflect such change? 

The package of ST25R3911B-AQFT should have chamfers at its 4 corners and we have observed that COO=KR parts have 4 corners while COO=TH parts don't have it. 

[Travis Palmer]

Dear Selena,

please have a look at the latest version of the ST25R3911B datasheet: DS11793 - Rev 8. 

Chapter 4.3 describes the "VFQFPN32 non-wettable package information" referring to your picture "ST25R3911B-AQFT ---COO=TH.png".

You can get the associated PCN MDG2313925 from your ST sales representative or distributor.

please let me know, if you have further questions.

br Travis

[Selena]

Dear Travis, 

Thank you for your fast response, following the latest datasheet of the ST25R3911B datasheet: DS11793 - Rev 8. 

https://www.st.com/resource/en/datasheet/st25r3911b.pdf

1, Chapter 4.3 describes the "VFQFPN32 non-wettable package information" referring to picture "ST25R3911B-AQFT ---COO=TH.png". We have checked the chapter of ordering code, it doesn't show the ordering information of "QFN32 non-wettable flank (ST25R3911B-AQFT), referring to COO=TH".  Do they share the same ordering code of QFN32 punched (ST25R3911B-AQFT)--Assembled in ASE Korea? Please help confirm. 

2, If they share the same ordering code, can we confirm that the parts of QFN32 punched (ST25R3911B-AQFT)--Assembled in ASE Korea and QFN32 non-wettable flank (ST25R3911B-AQFT)--Assembled in UTAC Thailand that  both offer complete form, fit, and function compatibility and are fully cross-compatible for use on PCB boards?  

Appreciate your confirmation and support, thank you!  

[Travis Palmer]

Hello Selena,

Yes, a qualification of the package has been done to ensure same performance and no drawback to our customers. 

The same PCB landing pattern can be used for both non-wettable flank QFN32 packages. Nevertheless I would recommend to crosscheck with your PCB assembly house.

If you have any concerns, please feel free to consult your ST-sales department.

The contact details can be found here: https://www.st.com/content/st_com/en/contact-us.html

BR Travis