Data Sheet Rev. 3
CN Rev. 3 | JP Rev. 3
IBIS Models
1 View All

Overview

Features and Benefits

  • Two Thermal-Diode Inputs
  • Up to 25kHz PWM Output Frequency
  • Three Selectable SMBus Addresses
  • Local Temperature Sensor
  • 1°C Remote Temperature Accuracy
  • Two PWM Outputs for Fan Drive (Open Drain; Can be Pulled Up to +13.5V)
  • Programmable Fan-Control Characteristics
  • Automatic Fan Spin-Up Ensures Fan Start
  • Controlled Rate-of-Change Ensures Unobtrusive Fan-Speed Adjustments
  • ±3% Fan-Speed Measurement Accuracy
  • Temperature Monitoring Begins at POR for Fail-Safe System Protection
  • Active-Low OT and Active-Low THERM Outputs for Throttling or Shutdown
  • Measures Temperatures Up to +150°C
  • MAX6639F is Optimized for n = 1.021 for Penryn Compatibility

Product Details

The MAX6639 monitors its own temperature and one external diode-connected transistor or the temperatures of two external diode-connected transistors, typically available in CPUs, FPGAs, or GPUs. The 2-wire serial interface accepts standard System Management Bus (SMBus) write byte, read byte, send byte, and receive byte commands to read the temperature data and program the alarm thresholds. Temperature data can be read at any time over the SMBus, and three programmable alarm outputs can be used to generate interrupts, throttle signals, or overtemperature shutdown signals.

The temperature data is also used by the internal dual-PWM fan-speed controller to adjust the speed of up to two cooling fans, thereby minimizing noise when the system is running cool, but providing maximum cooling when power dissipation increases. Speed control is accomplished by tachometer feedback from the fan, so that the speed of the fan is controlled, not just the PWM duty cycle. Accuracy of speed measurement is ±4%.

The MAX6639 is available in 16-pin QSOP and 16-pin thin QFN 5mm x 5mm packages. It operates from 3.0V to 3.6V and consumes just 500µA of supply current.

Applications

  • Desktop Computers
  • Networking Equipment
  • Notebook Computers
  • Projectors
  • Servers

Product Categories

Comparable Parts Click to see all in Parametric Search

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Documentation & Resources

  • View All (8)
  • Data Sheets (1)
  • Reliability Data (1)
  • Technical Articles (6)
    • Document Type

    Tools & Simulations

    IBIS Models

    Software Development

    MAX6639 Temp Monitor EV Kit Software, 1.0.0
    ZIP

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

    MAX6639 Material Declaration
    Quality And Reliability
    Symbols and Footprints

    PCN-PDN Information

    Select Model
    • MAX6639AEE+ Production
    • MAX6639AEE+T Production

    Support & Discussions

    MAX6639 Contact ADI Technical Support »
    MAX6639 Ask your question »
    MAX6639 Contact ADI Technical Support » MAX6639 Ask your question »

    Sample & Buy


    Ordering FAQs


    See our Ordering FAQs for answers to questions about online orders, payment options and more.

     

    Buy Now Pricing


    (**) Displayed Buy Now Price and Price Range is based on small quantity orders.

     

    List Pricing


    (*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

     

    Lead Times


    Please see the latest communication from our CCO regarding lead times.

     

    Sampling


    Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


    Price Table Help

     

    Evaluation Boards

    Pricing displayed is based on 1-piece.

    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.