2025-10-05 7:29 PM - last edited on 2025-10-06 12:00 AM by Peter BENSCH
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.
2025-10-06 5:30 AM
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
2025-10-07 7:29 PM
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!
2025-10-08 4:03 AM - last edited on 2025-10-09 1:00 AM by Ulysses HERNIOSUS
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