MAX3672

19-2697; Rev 0; 12/02 Low-Jitter 155MHz/622MHz Clock Generator 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. The MAX3672 operates from a single +3.3V or +5.0V supply and dissipates 150mW (typ) at 3.3V. The operating temperature range is -40°C to +85°C. Features o Single +3.3V or +5.0V Supply o Power Dissipation: 150mW at +3.3V Supply o External VCO Center Frequencies (fVCO): 155MHz to 700MHz o Reference Clock Frequencies: fVCO, fVCO/2, fVCO/4, fVCO/8, fVCO/32 o Main Clock Output Frequency: fVCO o Optional Output Clock Frequencies: fVCO, fVCO/2, fVCO/4, fVCO/8 o Low Intrinsic Jitter: <0.4psRMS o Loss-of-Lock Indicator o PECL Clock Output Interface MAX3672 Applications OC-12 to OC-192 SONET/WDM Transport Systems Clock Jitter Clean-Up and Frequency Synchronization Frequency Conversion System Clock Distribution Ordering Information PART MAX3672E/D TEMP RANGE -40°C to +85°C PIN-PACKAGE Dice* *Dice are designed to operate from -40° to +85°C, but are tested and guaranteed at TA = +25° only. Typical Application Circuit +3.3V 142Ω 155MHz REFCLK+ +3.3V...