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Giovanni4
Associate
Nov 19, 2025 6:17 AM UTC
Solved

What is encrypted here(BAT54AFILM)?

Hello!
From the datasheet, I could tell it was a BAT54AFILM (due to the D84 marking), but I couldn't figure out what E1 meant. Could you help me decipher this?

Thx!

Peter BENSCH
Peter BENSCHBest answer
ST Technical Moderator
Nov 19, 2025 8:38 AM UTC

@Giovanni4 The package is too small to accommodate the complete date code; only the last digit of the year (here ‘1’) fits in the top right-hand corner. The second character (here ‘E’) is internal and has no meaning for the user.

Hope that answers your question?

Regards
/Peter

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3 replies

Ozone
Ozone
Principal
Nov 19, 2025 6:39 AM UTC

 

Usually a date code.
The datasheet admittedly does not reveal anything in this regard.

Giovanni4Author
Associate
Nov 19, 2025 7:22 AM UTC

I understood that this is a date code, but how can it be deciphered?

Peter BENSCH
Peter BENSCHBest answer
ST Technical Moderator
Nov 19, 2025 8:38 AM UTC

@Giovanni4 The package is too small to accommodate the complete date code; only the last digit of the year (here ‘1’) fits in the top right-hand corner. The second character (here ‘E’) is internal and has no meaning for the user.

Hope that answers your question?

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
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