Package UFQFPN32 (5x5 mm) for STM32F302x6 STM32F302x8

[ATrem.1]

Hi,

The package UFQFPN32 (5x5 mm) have an exposed pad but where is the definition of this Exposed Pad in the datasheet for the STM32F302K8 K Must I connect to the GND or is it not connected or maybe another pin definition ? I can't see in the datasheet.

Thanks for your help.

[waclawek.jan]

This is a recurring question, see e.g. https://community.st.com/s/question/0D50X00009XkZOtSAN/stm32f301k8u6-connection-of-exposed-pad , https://community.st.com/s/question/0D50X00009XkWZWSA3/stm32f301kxux-exposed-pad-of-ufqfpn-package-connection , https://community.st.com/s/question/0D50X00009XkX5mSAF/stm32l071kbux-ufqfpn32-exposed-pad .

I can't find the mentioned remark in DocID025147 rev.7 (STM32F302x6 STM32F302x8 DS) nor in DS9895 Rev 8 (STM32F301x6 STM32F301x8).

@Amel NASRI​  , could this please be resolved, possibly for all the relevant DS with packages which have exposed pad?

JW

[Amel NASRI · Accepted solution]

Hello @ATrem.1​  and @Community member​ ,

Indeed the note to be added is the following: "“There is an exposed die pad on the underside of the UFQFPN package. It is recommended to connect and solder this back-side pad to PCB ground".

We need to wait for new document release to add it.

Thanks,

Amel

[waclawek.jan]

Thanks, Amel.

JW

[ATrem.1]

Thanks, Amel.

So it's the same for a lot of STM32 references with the same package. The STM32L432KC is in this case ?

[Amel NASRI]

Need to check for STM32L432KC.

[ATrem.1]

For my board, I connected it to the GND and it's working. I hope no problem later...

[Amel NASRI]

Note added for F302 datasheet (https://www.st.com/resource/en/datasheet/stm32f302r6.pdf).

[waclawek.jan]

Thanks, Amel.

JW

[waclawek.jan]

https://community.st.com/s/question/0D53W000013MuP7SAK/we-are-currently-doing-a-design-with-stm32h725rev-what-should-we-do-with-the-exposed-pad-in-the-middle-of-the-package-connect-to-ground-or-floating-or