EFM8LB1 Datasheet, PDF (58/70 Pages) Silicon Laboratories – The EFM8LB1 device family are fully integrated, mixed-signal system-on-a-chip MCUs. Highlighted features are listed below

8.3 QFP32 Package Marking
EFM8LB1 Data Sheet
QFP32 Package Specifications
EFM8
PPPPPPPPPPP
YYWWTTTTTT#
e3
Figure 8.3. QFP32 Package Marking
The package marking consists of:
• PPPPPPPP – The part number designation.
• TTTTTT – A trace or manufacturing code.
• YY – The last 2 digits of the assembly year.
• WW – The 2-digit workweek when the device was assembled.
• # – The device revision (A, B, etc.).
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