The 156.25 MHz frequency is a standard reference clock for 10 Gigabit Ethernet, Fibre Channel, and other high-speed serial protocols that require a low-jitter LVPECL source.
Supply voltage and power-down control
The supply voltage range of 2.25V to 3.6V covers common 2.5V and 3.3V rails, so it can run off the same supply as many FPGA and ASIC clock inputs without an extra regulator.
Package and board layout notes
The 6-SMD, No Lead package measures 5.00mm x 3.20mm with a seated height of 0.90mm — a standard footprint that matches many 6-pin MEMS and quartz oscillators, so swapping suppliers may not require a layout change.