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MAX3670
Low-Jitter 155MHz/622MHz Clock Generator


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Description
FULL DATA SHEET (PDF, 852kB)
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The MAX3670 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 MAX3670 integrates a phase/frequency detector, an operational amplifier (op amp), prescaler dividers and input/output buffers. Using an external VCO, the MAX3670 can be configured easily as a phase-lock loop with bandwidth programmable from 15Hz to 20kHz.

The MAX3670 operates from a single +3.3V or +5.0V supply, and dissipates 150mW (typ) at 3.3V. The operating temperature range is from -40°C to +85°C. The chip is available in a 5mm x 5mm, 32-pin QFN package.

Key Features   Applications/Uses
  • Single +3.3V or +5.0V Supply
  • Power Dissipation: 150mW at +3.3V Supply
  • External VCO Center Frequencies (fVCO): 155MHz to 670MHz
  • Reference Clock Frequencies: fVCO, fVCO/2, fVCO/8
  • 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

     
  • 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 Nominal Input Reference (Crystal or CLK) (kHz) Input Reference Range (MHz) Output Frequencies (MHz) Output Type Number of Outputs Number of PLLs Programmability Output Jitter (ps) Supply Voltage (V) RoHS Available Package Operating Temp. Range (°C) Price**
    MAX3670  155 0 to 155 Up to 670MHz LVPECL 2 1 Divider Ratio 0.2 3.0 to 3.6
    4.5 to 5.5
    Yes QFN/32
    THIN QFN/32
    -40 to +85 $14.60 @ 1k
    See All Clock Generators (22)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX3670: Minimal Operating Circuit
    Minimal Operating Circuit

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    Document Ref.: 19-2166; Rev 1; 2004-05-19
    This page last modified: 2007-07-02



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