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±1°C Accurate 8-Channel
Temperature Sensor
MAX6581
General Description
Features
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 over-
temperature 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 (ALERT and OVERT) assert corresponding to
these bits in the status register(s).
● 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
Resistance cancellation is available for all channels and
compensates for high series resistance in circuit-board
traces and thermal diodes.
2
● SMBus/I C-Compatible Interface
● Two Open-Drain Alarm Outputs (ALERT and OVERT)
● Resistance Cancellation on All Remote Channels
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.
Applications
● Desktop Computers
● Notebook Computers
● Workstations
The MAX6581 is specified for an operating temperature
range of -40°C to +125°C and is available in a 24-pin,
4mm x 4mm thin QFN package with an exposed pad.
● Servers
● Data Communications
Ordering Information/Selector Guide
OPERATING
TEMPERATURE RANGE
MEASURED
TEMPERATURE RANGE
PART
SLAVE ADDRESS
PIN-PACKAGE
MAX6581TG9A+
MAX6581TG9C+
MAX6581TG9E+
MAX6581TG98+
0X9A
0X9C
0X9E
0X98
24 TQFN-EP*
24 TQFN-EP*
24 TQFN-EP*
24 TQFN-EP*
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-64°C to +150°C
-64°C to +150°C
-64°C to +150°C
-64°C to +150°C
Note: All devices are specified over the -40°C to +125°C operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Typical Application Circuit appears at end of data sheet.
19-5260; Rev 5; 4/21
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