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Maxim > Products > Optoelectronics  Timekeeping, Timers, and Counters  Clock Generation 
MAX9491
Factory-Programmable, Single PLL Clock Generator


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Data Sheet
FULL DATA SHEET (PDF, 304kB)
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Description
The MAX9491 multipurpose clock generator is ideal for communication applications. It offers a factory-programmable PLL output that can be set to almost any frequency, ranging from 4MHz to 200MHz. The MAX9491 uses a one-time-programmable (OTP) ROM to program the PLL output. The MAX9491 also features an integrated voltage-controlled crystal oscillator (VCXO) that is tuned by a DC voltage. The VCXO output is used as the PLL input. The VCXO has a wide ±200ppm (typ) tuning range. The OTP on the MAX9491 is factory preset, based upon the customer request. Contact the factory for samples with preferred frequencies.

The device operates from a 3.3V supply and is specified over the -40°C to +85°C extended temperature range. The MAX9491 is available in 14-pin TSSOP and 20-pin TQFN (5mm x 5mm) packages.

Key Features   Applications/Uses
  		• 5MHz to 35MHz for Crystal-Clock Reference
  		• 5MHz to 50MHz for a Driver Clock Reference
  		• One Fractional-N PLL with Buffered Output
  		• 4MHz to 200MHz Output Frequency Range
  		• Low RMS Jitter PLL (< 13ps) at 197 MHz
  		• Integrated VCXO with ±200ppm Tuning Range
  		• Available in 14-Pin TSSOP and 20-Pin TQFN Packages
  		• +3.3V Supply
  		• -40°C to +85°C Temperature Range

    		  
  		• Data Networking Systems
  		• Home Entertainment Centers
  		• SOHO
  		• Telecommunications

    Key Specifications:   Clock Generators
    Part Number Input Reference Range (MHz) Output Frequencies (MHz) Output Type Number of Outputs Number of PLLs Programmability VCXO ± ppm Spread Spectrum Output Jitter (ps) Supply Voltage (V) RoHS Available Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX9491  5 to 30
    5 to 50     		4 to 200 LVCMOS 1 1 Factory One-Time Progammable (OTP) 200 No <13 3.0 to 3.6 Yes THIN QFN/20 26 -40 to +85 $1.20 @ 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
    MAX9491: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 3437: Solutions for Integrated Clock Sources Using the MAX9489/MAX9471 Multiple-Output Clock Generators - MAX9491
  		• Application Note 3578: Audio Data Transmission in MAX9217/MAX9218 Video Link - MAX9491
  		• Application Note 3736: How to Test the Crystal's Power Level in the MAX9485 - MAX9491

    Evaluation Kits
    none

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report 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: 1-16 of 16

    MAX9491 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX9491EUD  



    		-40°C to +85°C See data sheet
    MAX9491EUD-T  



    		-40°C to +85°C See data sheet
    MAX9491ETP010-T  



    		-40°C to +85°C See data sheet
    MAX9491ETP095-T  



    		-40°C to +85°C See data sheet
    MAX9491ETP095  



    		-40°C to +85°C See data sheet
    MAX9491ETP045-T  



    		-40°C to +85°C See data sheet
    MAX9491ETP045  



    		-40°C to +85°C See data sheet
    MAX9491ETP010  



    		-40°C to +85°C See data sheet
    MAX9491ETP095+  
    		THIN QFN;20 pin;26 mm²
    Dwg: 21-0140L (PDF)
    Use pkgcode/variation: T2055+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9491ETP080+T  
    		THIN QFN;20 pin;26 mm²
    Dwg: 21-0140L (PDF)
    Use pkgcode/variation: T2055+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9491ETP080+  
    		THIN QFN;20 pin;26 mm²
    Dwg: 21-0140L (PDF)
    Use pkgcode/variation: T2055+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9491ETP045+T  
    		THIN QFN;20 pin;26 mm²
    Dwg: 21-0140L (PDF)
    Use pkgcode/variation: T2055+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9491ETP045+  
    		THIN QFN;20 pin;26 mm²
    Dwg: 21-0140L (PDF)
    Use pkgcode/variation: T2055+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9491ETP095+T  
    		THIN QFN;20 pin;26 mm²
    Dwg: 21-0140L (PDF)
    Use pkgcode/variation: T2055+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9491ETP010+  
    		THIN QFN;20 pin;26 mm²
    Dwg: 21-0140L (PDF)
    Use pkgcode/variation: T2055+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9491ETP010+T  
    		THIN QFN;20 pin;26 mm²
    Dwg: 21-0140L (PDF)
    Use pkgcode/variation: T2055+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2006-02-13 

    Related Products
    MAX9485 Programmable Audio Clock Generator

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     Description 
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    Document Ref.: 19-3942; Rev 0; 2006-02-07
    This page last modified: 2006-02-13




             


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