200 MHz LVPECL output — what it buys you
The 200 MHz maximum output frequency on LVPECL pairs well with high-speed SERDES reference clocks, FPGA transceiver reference clocks, or Ethernet PHY master clocks. LVPECL gives you fast edge rates and good noise margin on differential lines, but it also means the termination network matters — plan for Thevenin-equivalent or AC-coupled termination at the receiver. The 1:4 fanout lets one crystal feed four clock domains without an external fanout buffer, saving board space and part count.