The CS2000-CP is an extremely versatile system clocking device that utilizes a programmable phase lock loop. The CS2000-CP is based on a hybrid analog-digital PLL architecture comprised of a unique combination of a Delta-Sigma Fractional-N Frequency Synthesizer and a Digital PLL. This architecture allows for both frequency synthesis/clock generation from a stable reference clock as well as generation of a lowjitter clock relative to an external noisy synchronization clock. The design is also unique in that it can generate low-jitter clocks relative to noisy external synchronization clocks at frequencies as low as 50 Hz. The CS2000-CP supports both IC and SPI for full software control.