A clock integrated circuit is packaged in a Tray-shaped package because it is for use as a clock. This clock generator will sustain a maximum temperature of 260 when reflown. The uPs/uCs/Peripheral IC clock generator incoporates is CLOCK GENERATOR, PROCESSOR SPECIFIC.
SI5340B-B05734-GM Features
SI5340B-B05734-GM Applications
There are a lot of Silicon Labs SI5340B-B05734-GM Clock Generators applications.