±1°C Accurate 8-Channel Temperature Sensor

Saves Cost and Space (Monitors Up to Seven External Temperatures, as Well as Its Own Die Temperature)
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Status Explanations for product status codes

Part Number Status
MAX6581 Active: In Production. See Ordering Information for details.


The MAX6581 precision multichannel temperature sensor monitors its own temperature and the temperatures of up to seven external diode-connected transistors. All temperature channels have programmable alert and overtemperature thresholds. When the measured temperature of a channel crosses the respective threshold, a status bit is set in one of the status registers. Two open-drain alarm outputs (active-low ALERT and active-low OVERT) assert corresponding to these bits in the status register(s).

Resistance cancellation is available for all channels and compensates for high series resistance in circuit-board traces and thermal diodes.

The 2-wire serial interface accepts SMBus protocols (write byte, read byte, send byte, and receive byte) for reading the temperature data and programming the alarm thresholds.

The MAX6581 is specified for an operating temperature range of -40°C to +125°C and is available in a 24-pin, 4mm × 4mm thin QFN package with an exposed pad.

Data Sheet

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An evaluation board is available: MAX6581EVKIT

NOTE: This product uses the following:
MAX6581 EVKIT Software

Key Features

  • Eight Channels to Measure Seven Remote and One Local Temperature
  • 11-Bit, 0.125°C Resolution
  • High Accuracy of ±1°C (max) from +60°C to +100°C (Remote Channels)
  • -64°C to +150°C Remote Temperature Range
  • Programmable Undertemperature/Overtemperature Alerts
  • SMBus/I²C-Compatible Interface
  • Two Open-Drain Alarm Outputs (Active-Low ALERT and Active-Low OVERT)
  • Resistance Cancellation on All Remote Channels


  • Data Communications
  • Desktop Computers
  • Notebook Computers
  • Servers
  • Workstations

Key Specifications:

Temperature Sensors
Part Number Sensor Type Alarm Output Functions Interface Remote Chan. Accuracy
Parasite Pwr. Temp. Thresh. Temp. Resolution
Oper. Temp.
See Notes
MAX6581  Remote
Dual Temperature Alarms
Multi-Channel Temperature Monitor
Remote & Local Sensor
2-Wire/I2C/SMBus Seven 1 No Programmable
-40 to +125 $1.24 @1k
See All Temperature Sensors (111)

Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX6581: Typical Application Circuit
Typical Application Circuit

More Information

New Product Press Release   2010-09-15 ]

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Information Index

Document Ref.: 19-5260 Rev 1; 2013-02-21
This page last modified: 2013-02-21