The NB3N3001 is a low-jitter, dual-rate PLL-synthesized clock generator. It accepts a standard 26.5625 MHz fundamental mode AT cut parallel resonant crystal as the reference source for its integrated crystal oscillator and low noise phase-locked loop (PLL) and produces user selectable clock frequencies of either 106.25 MHz or 212.5 MHz. In addition, the PLL circuitry will generate a 50% duty cycle square-wave through a pair of differential LVPECL clock outputs. Typical phase jitter at 106.25 MHz is 0.3 ps RMS from 637 kHz to 10 MHz.