In order to package it as a clock IC, the Tape & Reel (TR) package is used. This RF synthesizer has CLOCK GENERATOR, PROCESSOR SPECIFIC uPs, uCs, and peripheral ICs.
SI5351A-B10261-GTR Features
SI5351A-B10261-GTR Applications
There are a lot of Silicon Labs SI5351A-B10261-GTR Clock Generators applications.