The M672 is a Voltage Controlled SAW Oscillator (VCSO) with a selectable output frequency divider. The output frequency can be pin-selected to be either the VCSO fundamental frequency (Fvcso) or a fraction of Fvcso (1/8, 1/4, or 1/2 depending on frequency and order code). Available center fundamental frequencies for the VCSO are between 125 and 700MHz. Divided Fvcso frequencies are in the 60 to 175MHz range. The M672 SAW (surface acoustic wave) VCO is a high Q frequency source for low-jitter clock generation. It is well suited for phase-locked loop implementations, clock and data recovery circuits, and other timing applications in telecom and optical fiber networking systems (e.g., SONET/SDH).