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MAX3674
High-Performance, Dual-Output, Network Clock Synthesizer

1.6ps Cycle-to-Cycle Jitter and 0.8% Frequency Tuning


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 320kB)
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Description
The MAX3674 is a high-performance network clock synthesizer IC for networking, computing, and telecom applications. It integrates a crystal oscillator, a low-noise phase-locked loop (PLL), programmable dividers, and high-frequency LVPECL output buffers. The PLL generates a high-frequency clock based on a low-frequency reference clock provided by the on-chip crystal oscillator or an external LVCMOS clock. The MAX3674 has excellent period jitter, cycle-to-cycle jitter, and supply noise rejection performance. With output frequencies programmable from 21.25MHz to 1360MHz and support of two differential PECL output signals, the device provides a versatile solution for the most demanding clock applications.

Programming is accomplished through a 2-wire I²C bus or parallel interface that can change the output frequency on demand for frequency margining. Both LVPECL outputs have synchronous stop functionality, and the PLL has a LOCK indicator output. The MAX3674 operates from a +3.3V supply and typically consumes 396mW. The device is packaged in a 48-pin LQFP, and the operating temperature range is from -40°C to +85°C.

An evaluation kit is available:  MAX3674EVKIT  

Key Features   Applications/Uses
  • 21.25MHz to 1360MHz Programmable PLL Synthesized Output Clocks
  • Two Differential LVPECL-Compatible Outputs
  • Cycle-to-Cycle Jitter 1.6ps RMS and Period Jitter 0.9ps RMS at 500MHz
  • On-Chip Crystal Oscillator or Selectable LVCMOS-Compatible Reference Clock Input
  • Excellent Power-Supply Noise Rejection
  • Parallel or 2-Wire I²C Programming Interface
  • Lock Indicator Output
  • +3.3V Power Supply
  • Power Consumption: 396mW at 3.3V
  • 48-Pin LQFP Pb-Free Package
  • -40°C to +85°C Temperature Range

 
  • Ethernet Network ASIC Clock Generation
  • Frequency Margining
  • Optical Network ASIC Clocking
  • Programmable Clock Source for Server, Computing, or Communication Systems
  • Storage Area Network ASIC Clocking

    Key Specifications:  Clock Generators
    Part Number Applications fIN
    (MHz)
    fIN
    (MHz)
    fOUT
    (MHz)
    fOUT
    (MHz)
    Fixed or Continuous Frequency Output Levels Out-
    puts
    PLLs Program-
    mability
    Spread Spectrum Output Jitter
    (ps)
    VSUPPLY
    (V)
    Package/Pins Price
    min max min max RMS See Notes
    MAX3674  General Purpose 16 16 21.25 1360 Continuous LVPECL 2 1
    I2C
    Pin
    No 0.9 3.3
    TQFP/48
    $6.85 @1k
    See All Clock Generators (27)

    Diagram
    MAX3674: Typical Application Circuit
    Typical Application Circuit

    Evaluation Kits
  • MAX3674EVKIT

    Design Guides
  • Fiber (PDF)
  • High-Speed Interconnect (PDF)

    Reliability Reports
  • Reliability Report: MAX3674.pdf
  • Show FIT data for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-2 of 2

    MAX3674 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3674ECM+  
    Active TQFP;48 pin;85 mm²
    Outline Drawing: 21-0054 (PDF)
    Land Pattern: 90-0093 (PDF)
    Use pkgcode/variation: C48+3*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3674ECM+T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet

    More Information
  • New Product Press Release 2008-04-21 
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    Document Ref.: 19-2483; Rev 0; 2008-01-03
    This page last modified: 2009-08-26


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