As a clock IC, it is packaged by the Tray method. The peak reflow temperature (Cel) amounts to 260 to be essentially indestructible. There are CLOCK GENERATOR, PROCESSOR SPECIFIC uPs/uCs/Peripheral ICs integrated into this digital clock generator.
SI5335B-B09921-GM Features
SI5335B-B09921-GM Applications
There are a lot of Silicon Labs SI5335B-B09921-GM Clock Generators applications.