Auto Fan Device with Piecewise Linear Control, Temperature Monitoring and Voltage Monitoring for Multi-Processor Systems

Features

  • 3.3 Volt Operation (5 Volt Tolerant Input Buffers)
  • SMBus 2.0 Compliant Interface (Fixed, Not Discoverable) with Three Slave Address Options
    • SMBus Address Change Pin
    • SMBus Address Enable Pin
  • Auto-Fan Control with ProcHot Features
    • PWM (Pulse Width Modulation) Outputs (3)
    • Low Frequency and High Frequency PWM Options (15kHz up to 30kHz)
    • Fan Tachometer or Lock Rotor Inputs (4)
    • Programmable Automatic Fan Control Based on Temperature
    • Acoustic Enhancement Mode
    • ProcHot Pins Modulate Tmin
    • Fan RPM Is a Function of Up to Three Temperatures and ProcHot Signals
    • Piecewise Linear Fan Control Algorithm Option
  • Temperature Monitor
    • Monitoring of Up to Five Remote Thermal Diodes (+/- 3 Deg C Accuracy)
    • Internal Ambient Temperature Measurement
    • Limit Comparison of All Monitored Values
    • Interrupt Pin for Out-of-Limit Temperature Indication
    • Configurable Offset for Internal or External Temperature Channels
  • Voltage Monitor
    • Monitor Power Supplies (+1.5V, +2.5V, +5V, VCC and Two 1.5V VCCP)
    • Limit Comparison of All Monitored Values
    • Interrupt Pin for Out-of-Limit Voltage Indication
  • ProcHot Input/Bi-Directional Pins (2)
    • Selectable Pins Dedicated As Input or Input/Output
    • Separate ProcHot Output Pin (FORCED_PR#)
  • Power Good Output
  • SMBus Alert Interrupt Output
  • Register Characteristics
    • Individual Enables/Disables for Each Input
    • Two ISRs for Each Alert
  • XOR Tree Test Mode
  • Mechanical Package: 36-pin QFN; lead-free RoHS Compliant

Although the information in this document has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to product descriptions and specifications at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order. Products may contain design defects or errors known as anomalies which may cause a product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC's website at http://www.smsc.com. SMSC and the SMSC logo are registered trademarks of Standard Microsystems Corporation ("SMSC"). Other names mentioned may be trademarks of their respective holders. All claims made herein speak as of the date of this material. The company does not undertake to update such statements.

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