STM32F405RGT6 package

LisaLisi · ‎2025-09-07

I have received some STM32F405RGT6 microcontrollers that have two circular marks (holes) on the package, while the official datasheet only shows one mark indicating pin 1.

Is there an official revision or packaging variant from STMicroelectronics that includes two marks?

Additionally, does having two marks indicate that the part might be counterfeit or not authentic?

Could you please provide official documentation or images to clarify this

STTwo-32 · ‎2025-09-07

Hello @LisaLisi and welcome to the ST Community.

according to the DS8626, the MCU you are asking about is a LQFP64 (10 x 10mm). So, referring to the TN1433, the marking on the package top view is exactly as follow:

So, check if your MCU follow this model. If it is not, please send me a privet message on the ST Community that include a picture of your MCU.

Best Regards.

STTwo-32

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AScha.3 · ‎2025-09-07

If you just see two "marks" , dont worry about, only one is pin1 marking; more might come from the package.

see image from rs :

This is as it should look.

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