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±1°C Accurate 8-Channel Temperature Sensor

Saves Cost and Space (Monitors Up to Seven External Temperatures, as Well as Its Own Die Temperature)

Product Details

Key Features

Parametric specs for Temperature Sensors
Sensor Type Remote
# Channels Seven
Interface 2-Wire/I2C/SMBus
Alarm Output Alert
Overt
Functions Dual Temperature Alarms
Multi-Channel Temperature Monitor
Remote & Local Sensor
Accuracy (±°C) 1
Parasite Pwr. No
Temp. Thresh. Programmable
Temp. Resolution (bits) 8
11
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN/24
Budgetary
Price (See Notes)
1.34
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Simplified Block Diagram

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Parameters

Parametric specs for Temperature Sensors
Sensor Type Remote
# Channels Seven
Interface 2-Wire/I2C/SMBus
Alarm Output Alert
Overt
Functions Dual Temperature Alarms
Multi-Channel Temperature Monitor
Remote & Local Sensor
Accuracy (±°C) 1
Parasite Pwr. No
Temp. Thresh. Programmable
Temp. Resolution (bits) 8
11
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN/24
Budgetary
Price (See Notes)
1.34

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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX6581: Typical Application Circuit MAX6581: Typical Application Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .