How to decode QFN20 marking ?

[Martin Devera]

Hello, there is posibility we mixed STM8L101F3 vs F3U. There is marking L1S3 on the top, but I can't find any information/table of these markings. Is is possible to have it ?

[Peter BENSCH · Accepted solution]

The list markings of STM8L101 in UFQFPN20:

• L1F1 STM8L101F1U6A (COMP_REF available)
• L1A2 STM8L101F2U6A (COMP_REF available)
• L101 STM8L101F2U6 (COMP_REF not available)
• L1A1 STM8L101F3U6A (COMP_REF available)
• L1S3 STM8L101F3U6 (COMP_REF not available)

Does it answer your question?

/Peter

[Martin Devera]

Yes, thank you.

[AMacd.1]

@Peter BENSCH:

I just landed on this thread while searching for the exact same question and I have another question to follow up: Where did you get this list? I cannot find it anwhere in the official datasheet downloaded from st.com.

Do you know if the datasheet will ever get corrected or if some other official document will be provided on the web site to cover this oversight?

[AMacd.1]

FYI: I just got an answer from st.com support. This is good enough for me:

Dear Allan Macdonald,

Below case has been updated by ST Support.

Case#: 00156938

Subject: STM8L101F3U Marking

Status: Solution Proposed

Description:

Hi Allan,

Thank you for contacting STMicroelectronics.

My apologies that they don't make that as clear as they should, and only give that "example".

Yes, I confirm in our database here that the marking of L1S3 is consistent with the orderable device STM8L101F3U6TR.

I hope you find this helpful!

Please reply to this email to confirm all is well.

Regards,

Billy

Please visit ST Customer Support Portal for further information.

Link to access the case:

https://community.st.com/s/case/5003W00000HPl6jQAD

Best regards,

ST Customer Support