FemtoClock Crystal/LVCMOS-to-LVDS/LVCMOS Frequency Synthesizer

The 8440259D-05 is a 9-output synthesizer optimized to generate Gigabit and 10 Gigabit Ethernet. Using a 25MHz, 18pF parallel resonant crystal, the device will generate 125MHz and 3.90625MHz clocks with mixed LVDS and LVCMOS/LVTTL output levels. The 8440259D- 05 uses our 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting Ethernet jitter requirements. The 8440259D-05 is packaged in a small, 32-pin VFQFN package that is optimum for applications with space limitations.