A clock integrated circuit is packaged in a Tray-shaped package because it is for use as a clock. There are CLOCK GENERATOR, PROCESSOR SPECIFIC uPs/uCs/Peripheral ICs integrated into this digital clock generator.
SI5380A-B06423-GM Features
SI5380A-B06423-GM Applications
There are a lot of Silicon Labs SI5380A-B06423-GM Clock Generators applications.