Is EFR32xG12 in the QFN48 package a drop-in replacement for earlier EFR32xG1 devices?
The EFR32xG12 is a drop-in replacement for QFN48-packaged EFR32xG1 applications except where vias have been located between pins and exposed GND pad, as these vias risk shorting to GND over time (depending on solder mask quality). To avoid this concern, do not place vias in this region.
The following images depict EFR32xG12 and EFR32xG1 devices installed on a EFR32xG1 footprint:
Refer to the EFR32xG12 and EFR32xG1 datasheets for more information regarding package dimensions.