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Maxim > Products > [Optoelectronics]  [Clock Generation] 
MAX3670
Low-Jitter 155MHz/622MHz Clock Generator


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 204kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
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.

An evaluation kit is available:  MAX3670EVKIT  

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 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
    MAX3670  SONET/SDH 0 155 0 670 Continuous LVPECL 2 1 Pin No 0.2
    3.3
    5
    QFN/32
    TQFN/32
    		 $14.60 @1k
    See All Clock Generators (27)

    Diagram
    MAX3670: Minimal Operating Circuit
    Minimal Operating Circuit

    Application Notes
  		• Application Note 462: HFAN-04.0.2: Converting between RMS and Peak-to-Peak Jitter at a Specified BER - MAX3670
  		• Application Note 995: MAX3892: 2.7Gbps Transponder Applications Using the MAX3892, MAX3882, and MAX3670 Chipset - MAX3670
  		• Application Note 1032: MAX3670: Loop-Filter Configuration for the MAX3670 Low-Jitter PLL Reference Clock Generator - MAX3670
  		• Application Note 1078: MAX3670: Loop Bandwidth Calculator for the MAX3670 - MAX3670
  		• Application Note 3258: HFTA-08.0: Receivers and Transmitters in DWDM Systems - MAX3670
  		• Application Note 3766: HFTA-12.0: Measuring Crosstalk Penalty in High-Speed Bidirectional Serial Communication Modules - MAX3670

    Evaluation Kits
  		• MAX3670EVKIT

    Design Guides
  		• Fiber (PDF)

    Reliability Reports
  		• Reliability Report: MAX3670.pdf
  		• Show FIT data for:

    Software/Models
  		• MAX3670EGJ IBIS Model

    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: 1-4 of 4

    MAX3670 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3670ETJ+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX3670EGJ  
    		Active QFN;32 pin;26 mm²
    Outline Drawing: 21-0091 (PDF)
    Land Pattern: 90-0279 (PDF)
    Use pkgcode/variation: G3255-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3670EGJ-T    
    		Active QFN;32 pin;26 mm²
    Outline Drawing: 21-0091 (PDF)
    Land Pattern: 90-0279 (PDF)
    Use pkgcode/variation: G3255-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3670ETJ+    
    		Active TQFN;32 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0001 (PDF)
    Use pkgcode/variation: T3255+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2001-11-28 
  		• Loop Bandwidth Calculator

    Related Products
    MAX3880 +3.3V, 2.488Gbps, SDH/SONET 1:16 Deserializer with Clock Recovery
    MAX3890 +3.3V, 2.5Gbps, SDH/SONET 16:1 Serializer with Clock Synthesis and LVDS Inputs

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    Document Ref.: 19-2166; Rev 2; 2009-09-30
    This page last modified: 2009-09-30


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