NCT72CMTR2G Thermal Management by ON Semiconductor

±1°C Temperature Monitor with Series Resistance Cancellation


The NCT72 is a dual-channel digital thermometer and undertemperature/overtemperature alarm, intended for use in PCs and thermal management systems. It is pin and register compatible with the NCT1008 but the NCT72 allows the user to pull the /ALERT pin to 1.8V without increasin the device Idd. A feature of the NCT72 is series resistance cancellation, where up to 1.5 kΩ (typical) of resistance in series with the temperature monitoring diode can be automatically cancelled from the temperature result, allowing noise filtering. The NCT72 has a configurable /ALERT output and an extended, switchable temperature measurement range. The NCT72 can measure the temperature of a remote thermal diode accurate to ±1°C and the ambient temperature accurate to ±3°C. The temperature measurement range defaults to 0°C to +127°C, compatible with the NCT1008, but it can be switched to a wider measurement range of -64°C to +191°C. The NCT72 communicates over a 2-wire serial interface, compatible with system management bus (SMBus/I2C) standards. The default SMBus/I2C address of the NCT72 is 0x4C. An NCT72D is available with an SMBus/I2C address of 0x4D. This is useful if more than one NCT72 is used on the same SMBus/I2C. An /ALERT output signals when the on-chip or remote temperature is out of range. The /THERM output is a comparator output that allows on/off control of a cooling fan. The /ALERT output can be reconfigured as a second /THERM output, if required.

Where to Buy

Prices starting from US$1.12

Distributor Stock
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Future Electronics
from US$1.12
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Chip One Stop
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Newark Electronics
from US$1.61
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element14
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Avnet America
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Features

On-Chip and Remote Temperature Sensor
0.25°C Resolution/1°C Accuracy on Remote Channel
1°C Resolution/1°C Accuracy on Local Channel
Series Resistance Cancellation up to 1.5 kΩ
Extended, Switchable Temperature Measurement Range 0°C to +127°C (Default) or -64°C to +191°C
Pin and Register Compatible with NCT1008
Remote /THERM limit of 108°C
2-Wire SMBus/I2C Serial Interface with SMBus Alert Support
Programmable Over/Undertemperature Limits
Offset Registers for System Calibration
Up to Two Overtemperature Fail-Safe /THERM Outputs
240 µA Operating Current, 5 µA Standby Current
Compatible with 1.8 V Logic
Applications
Thermal Management
Game Consoles
Occupancy Sensors
Dishwashers
Vacuum Cleaners
RFID Readers
End Products
Notebook and Desktop Computers
LCD TVs
DSL Line Cards
Refrigerators
Induction Cookers

Specifications

Description NCT72
Compliance Pb-free Halide free
Sensor Type Local & Remote
Data Transmission Standard I2C
ICC Max (mA) 0.35
VCC Min (V) 2.8
VCC Max (V) 3.6
T Min (°C) -40
T Max (°C) 125
Temperature Error (°C) ±1
Package Type WDFN-8

Alternative Descriptions

NCT72 Series 3.6V Temperature Monitor w/Series Resistance Cancellation - WDFN-8 | Future Electronics
Temperature Sensor, 0.1Deg C, Wdfn-8 | Newark Electronics
Temp Sensor Analog Serial (2-Wire, I2C) 8-Pin WDFN T/R | Avnet America


Frequently Asked Questions

Where can I find additional details, specifications and documents for a NCT72CMTR2G?

Additional datasheets, footprints and schematics for NCT72CMTR2G are listed on our Part Details page. You can also find images and similar parts to NCT72CMTR2G on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for NCT72CMTR2G on our Product Comparison page. Access via the 'View Pricing & Stock' button to view NCT72CMTR2G price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does NCT72CMTR2G fall under?

The NCT72CMTR2G is listed under Sensors > Thermal Management > Temperature Sensors.

Can I view similar or alternative parts?

You can view similar parts to NCT72CMTR2G when available in the Temperature Sensors range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the NCT72CMTR2G you can contact the distributor directly for product support, shipping queries etc.

Is the NCT72CMTR2G RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by ON Semiconductor.

Which authorised distributors for NCT72CMTR2G have stock available?

Authorised distributors including Future Electronics, Chip One Stop, Newark Electronics, element14 and Farnell have stock available or on a lead time for NCT72CMTR2G.

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