The SM802117 is a member of the ClockWorks™ family of devices from Micrel and provides an extremely low-noise timing solution for GbE Ethernet clock signals. It is based upon a unique patented RotaryWave® architecture that provides very low phase noise. The device operates from a 3.3V or 2.5V power supply and synthesizes LVPECL output clocks at 125MHz. There are two differential clock outputs each with it’s own OE pin allowing them to be disabled independently. The SM802117 accepts a 25 MHz crystal or LVCMOS reference clock.