The MK2069-03 is a Voltage Controlled Crystal Oscillator (VCXO) based clock generator that offers system synchronization, jitter attenuation, and frequency translation. It can accept an input clock over a wide range of frequencies and produces a de-jittered, low phase noise clock output. The device is optimized for user configuration by providing access to all major PLL divider functions. No power-up programming is needed as configuration is pin selected. External VCXO loop filter components provide an additional level of performance tailoring. The MK2069-03 features a very wide range VCXO PLL feedback divider, allowing high-frequency multiplication ratios and therefore the input of very low input reference frequencies. The lock detector (LD) output serves as a clock status monitor. The clear (CLR) input enables rapid synchronization to the phase of a newly selected input clock while eliminating the generation of extra clock cycles and wander caused by memory in the PLL feedback divider. CLR also serves as a temporary holdover function when kept low.