QuickView - MAX3672 Low-Jitter 155MHz/622MHz Clock Generator

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Maxim > Products > [Optoelectronics] [Clock Generation]

MAX3672 Low-Jitter 155MHz/622MHz Clock Generator

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Description

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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.

Key Features Applications/Uses

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

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

Key Specifications: Clock Generators

Part Number

Applications

f_IN (min) (MHz)

f_IN (max) (MHz)

f_OUT (min) (MHz)

f_OUT (max) (MHz)

Fixed or Continuous Frequency

Output Levels

Number of Outputs

Number of PLLs

Programmability

Spread Spectrum

Output Jitter (ps RMS)

Supply Voltage (V)

MAX3672

•

SONET/SDH

155

670

Continuous

LVPECL

0.2

3.3
5.0

See All Clock Generators (28)

Diagram

MAX3672: Typical Application Circuit
Typical Application Circuit

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Document Ref.: 19-2697; Rev 0; 2003-02-06
This page last modified: 2007-08-02