Dear Silicon laboratories support team,
i would like to ask you to clarify the chip marking of SIM3x device. For an example, the picture below, what the numbers(1131BCS701TW) in the chip marking means?
It is strange that both the RM and DS don't explain this mark.
The datasheet only mention the character in bold should be revision.
But I think this is very similar to the format in this KB:
You could create a ticket in our support portal for double confirm.
An interesting things I observed is that the revision information conflicted in your attached picture. I take a look at the datasheet and it seems there are 2 characters in the mark that indicate revision, but in your picture ('A' and 'B') it conflict each other.
My views are my own and do not necessarily represent the views of Silicon Labs
I got below update:
The third line reads, in this example, “1031BCS701”.
Please let me know if this answer your question.