General Description
The MAX3672 is a low-jitter 155MHz/622MHz reference clock generator IC designed for system clock distribution and frequency synchronization in OC-48 and OC-192 SONET/SDH and WDM transmission systems. The MAX3672 integrates a phase/frequency detector, an operational amplifier (op amp), prescaler dividers, and input/output buffers. Using an external VCO, the MAX3672 can be configured easily as a phase-lock loop with bandwidth programmable from 30Hz to 10kHz.

Features
♦ Single +3.3V or +5.0V Supply
♦ Power Dissipation: 150mW at +3.3V Supply
♦ External VCO Center Frequencies (fVCO): 155MHz to 700MHz
♦ Reference Clock Frequencies: fVCO, fVCO/2, fVCO/4, fVCO/8, fVCO/32
♦ Main Clock Output Frequency: fVCO
♦ Optional Output Clock Frequencies: fVCO, fVCO/2, fVCO/4, fVCO/8
♦ Low Intrinsic Jitter: <0.4psRMS
♦ Loss-of-Lock Indicator
♦ PECL Clock Output Interface

Applications
    OC-12 to OC-192 SONET/WDM Transport Systems
    Clock Jitter Clean-Up and Frequency Synchronization
    Frequency Conversion
    System Clock Distribution