DESCRIPTION

· The Si598 XO/Si599 VCXO utilizes Skyworks Solutions' advanced DSPLL® circuitry to provide a low-jitter clock at any frequency.
· User-programmable to any output frequency from 10 to 810 MHz with 28 parts per trillion (PPT) resolution.
· Programmed via a 2-pin I2C compatible serial interface.
· Ideal for applications requiring in-circuit dynamic frequency adjustments or multi-rate operation with non-integer related rates.
· Integrated crystal provides stable low jitter frequency synthesis, replacing multiple XOs, clock generators, and DAC controlled VCXOs.

FEATURES

· I2C programmable output frequencies from 10 to 810 MHz.
· 0.5 ps RMS phase jitter.
· Superior power supply rejection: 0.3–0.4 ps additive jitter.
· Available LVPECL, CMOS, LVDS, and CML outputs.
· 1.8, 2.5, or 3.3 V supply.
· Pin- and register-compatible with Si570/571.
· Programmable with 28 parts per trillion frequency resolution.
· Integrated crystal provides stability and low phase noise.
· Frequency changes up to ±3500 ppm are glitchless.
· –40 to 85 °C operation.
· Industry-standard 5x7 mm package.

APPLICATIONS

· SONET / SDH / xDSL.
· Ethernet / Fibre Channel.
· 3G SDI / HD SDI.
· Multi-rate PLLs.
· Multi-rate reference clocks.
· Frequency margining.
· Digital PLLs.
· CPU / FPGA FIFO control.
· Adaptive synchronization.
· Agile RF local oscillators.