STM32WB55VGY6TR Device marking error?

[Yossie]

We purchased 1,200 STM32WB55VGY6TR chips from the STmicroelectronics eStore for production. We encountered several firmware programming issues during the manufacturing process, and while investigating the cause, we noticed that the device marking was printed as WB55VEY. The chips that were successfully programmed appear to be OK. The device marking is printed as WB55VEY6, but the actual flash memory capacity is 1MB and the contents appear to be WB55VGY. Can we assume that the chip in the attached photo is an STM32WB55VGY6TR and use it without any problems? By the way, the lot number is listed as:
WB55VEY6
A5 011 9R
TW 4 48 X
e1

We've contacted the eStore, but haven't received a reply.
"Case# 00247962"
What should we do? Can you help us?

[Amel NASRI]

Hi @Yossie ,

Thank you for bringing this to our attention. The matter has been shared internally for further checks and review.

We appreciate your patience and understanding.

-Amel

[Yossie]

Dear Ms.Amel NASRI,Thank you for your support.

Please keep us informed of any updates on this issue.

We checked the eStore site to see if the Bulk ID is listed, but unfortunately, we could not find any similar numbers. We would appreciate it if you could trace it by lot number.

The application is for a Class II regulated medical device in Japan.

We plan to submit this production to the respective certification authorities. If you can confirm that only the "device marking" on the package was incorrect, and that the contents are indeed STM32WB55VGY6TR, we would appreciate it if you could issue documentation to prove this.

Best regards,

Yossie

[Amel NASRI]

Hello Mr @Yossie ,

I apologize for any inconvenience this created for you. I'm pushing to get a status.

Regarding the technical point, I share that the main difference between STM32WB55VGY6TR and STM32WB55VEY6TR is the flash memory size: the VGY6TR variant has 1 Mbyte, while the VEY6TR variant has 512 Kbytes. All other key features are the same. Unfortunately, I am not able to confirm if it is a marking issue or not.

Both part number share the same datasheet.

Best Regards,

Amel

[Yossie]

Dear Ms. Amel NASRI,

Thank you very much for your ongoing support in investigating this matter. We are eagerly awaiting your findings.

Our understanding is that the difference between the STM32WB55VGY6TR and STM32WB55VEY6TR is solely the Flash Memory size. Since our product mandates a 1MB capacity, we selected the VGY6 model. Additionally, this specific part number is listed in our official filing for medical device certification, so accuracy is paramount.

To summarize the complexity of the current situation:

1. Visual Mismatch: The delivered reel was labeled "STM32WB55VGY6TR," but the chips themselves bore the device marking "STM32WB55VEY6TR."

2. Functional Success: Despite the marking, the chips accepted our programming successfully, and the tool recognized the Flash memory as 1MB.

3. Operation: The units are currently functioning correctly on our boards.

We suspect one of the following scenarios caused this:

• Marking Error: The chips are correctly 1MB (VGY6TR) but were wrongly stamped with the VEY marking. The eStore may have processed the 1,200 cut-tape units without realizing this error.

• Part Error / Undocumented Memory: The chips are actually VEY6TR, and the eStore mislabeled the reel.

  • Question: Do VEY6TR chips physically contain more memory than the specified 512KB? If the extra memory exists but is not guaranteed (a "gray zone"), is it possible that our programming succeeded by chance?

Please help us clarify the root cause, as we must ensure full compliance for our medical device.

Best regards,

Yossie.