EFM8UB1 Datasheet, PDF (26/59 Pages) Silicon Laboratories – The EFM8UB1 highlighted features are listed below

4.4 Typical Performance Curves
EFM8UB1 Data Sheet
Electrical Specifications
Figure 4.1. Typical Operating Supply Current using HFOSC0
Figure 4.2. Typical Operating Supply Current using HFOSC1
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