±1°C Remote and Local Temperature Sensor with SMBus, I2C Interface


Product details


Local sensor accuracy (Max) (+/- C) 1 Type Remote Operating temperature range (C) 0 to 125 Supply voltage (Min) (V) 3 Interface type I2C, SMBus, 2-Wire Supply voltage (Max) (V) 3.6 Supply current (Max) (uA) 1000 Temp resolution (Max) (bits) 8 Features ALERT Remote channels (#) 1 Addresses 9 Rating Catalog open-in-new Find other Digital temperature sensors

Package | Pins | Size

SSOP (DBQ) 16 29 mm² 4.9 x 6 open-in-new Find other Digital temperature sensors


  • Directly senses die temperature of remote ICs
  • Senses temperature of remote diodes
  • SMBus compatible interface, supports SMBus Timeout
  • Register readback capability
  • 7 bit plus sign temperature data format
  • 2 address select lines enable 9 LM84s to be connected to a single bus

Key Specifications

Supply Voltage 3.0V - 3.6V
Supply Current 1 mA (max)
Local Temperature Accuracy ±1.0°C (typ)
Remote Diode Temperature Accuracy  
+60°C to +100°C ±3°C (max)
0°C to +125°C ±5°C (max)

open-in-new Find other Digital temperature sensors


The LM84 is a remote diode temperature sensor, Delta-Sigma analog-to-digital converter, and digital over-temperature detector with an SMBus™ interface. The LM84 senses its own temperature as well as the temperature of a target IC with a diode junction, such as a Pentium® II processor or a diode connected 2N3904. A diode junction (semiconductor junction) is required on the target IC's die. A host can query the LM84 at any time to read the temperature of this diode as well as the temperature state of the LM84 itself. A T_CRIT_A# interrupt output becomes active when the temperature is greater than a programmable comparator limit, T_CRIT.

The host can program as well as read back the state of the T_CRIT register. Three state logic inputs allow two pins (ADD0, ADD1) to select up to 9 SMBus address locations for the LM84. The sensor powers up with default thresholds of 127°C for T_CRIT.

open-in-new Find other Digital temperature sensors

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet LM84 Diode Input Digital Temperature Sensor with Two-Wire Interface datasheet (Rev. B) May 03, 2004
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

CAD/CAE symbols

Package Pins Download
SSOP (DBQ) 16 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​


Related videos