What is the soldering profile for the STM32WB35CCU6A MCU?

VVakh.1 · ‎2022-02-08

The operating temperature range for the above MCU is -40 to 85 deg C (105 deg C junction). Does it mean that the maximum temperature for soldering is 105 deg C, or does it just mean that the MCU will shut down at 105 deg C? I would appreciate it if you refer to any official application note.

TDK · ‎2022-02-08

85C (105C junction) is the max operating temperature. Junction temperature is what actually matters here. Beyond that range the behavior is no longer guaranteed.

Soldering will need to be quite a bit hotter.

https://www.st.com/resource/en/application_note/an2639-soldering-recommendations-and-package-information-for-leadfree-ecopack-mcus-and-mpus-stmicroelectronics.pdf

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TDK · ‎2022-02-08

85C (105C junction) is the max operating temperature. Junction temperature is what actually matters here. Beyond that range the behavior is no longer guaranteed.

Soldering will need to be quite a bit hotter.

https://www.st.com/resource/en/application_note/an2639-soldering-recommendations-and-package-information-for-leadfree-ecopack-mcus-and-mpus-stmicroelectronics.pdf

If you feel a post has answered your question, please click "Accept as Solution".

VVakh.1 · ‎2022-02-09

Thank you