It is packaged using the Tray method since it is a clock IC. The peak reflow temperature (Cel) amounts to 260 to be essentially indestructible. RF synthesizer incorporates CLOCK GENERATOR, PROCESSOR SPECIFIC UPUs, PCs, and peripheral IC's.
SI5335B-B10537-GM Features
SI5335B-B10537-GM Applications
There are a lot of Silicon Labs SI5335B-B10537-GM Clock Generators applications.