It is packaged using the Tray method since it is a clock IC. This clock generator ic can sustain 260 degrees of temperature during reflowing. There are CLOCK GENERATOR, PROCESSOR SPECIFIC uPs/uCs/Peripheral ICs integrated into this digital clock generator.
SI5335A-B09129-GM Features
SI5335A-B09129-GM Applications
There are a lot of Silicon Labs SI5335A-B09129-GM Clock Generators applications.