It is packaged using the Tray method since it is a clock IC. This clock generator will sustain a maximum temperature of 260 when reflown. There are CLOCK GENERATOR, PROCESSOR SPECIFIC uPs/uCs/Peripheral ICs integrated into this digital clock generator.
SI5355A-B04922-GM Features
SI5355A-B04922-GM Applications
There are a lot of Silicon Labs SI5355A-B04922-GM Clock Generators applications.