1FEATURES
23• Accurately Senses Die Temperature of 2
Remote ICs or Diode Junctions and Local
Temperature
• TruTherm BJT Beta Compensation Technology
Accurately Senses Sub-Micron Process
Thermal Diodes
• 0.125°C LSb Temperature Resolution
• 0.03125°C LSb Remote Temperature
Resolution with Digital Filter Enabled
• +127.875°C/–128°C and 0°C/255°C Remote
Ranges
• Programmable Digital Filters and Analog Front
End Filter
• Remote Diode Fault Detection, Model diodeSelection
and Offset Correction
• Mask and Status Register Support
• 3 Programmable TCRIT Outputs with
Programmable Shared Hysteresis
• Programmable Conversion Rate and Shutdown
Mode One-Shot Conversion Control
• SMBus 2.0 Compatible Interface, Supports
TIMEOUT
• Three-Level Address Pin
• 14-Pin WSON Package

APPLICATIONS
• Processor/Computer System Thermal
Management (e.g. Laptop, Desktop,
Workstations, Server)
• Electronic Test Equipment
• Office Electronics

KEY SPECIFICATIONS
• Local Temperature Accuracy: ±2.0 °C (max)
• Remote Diode Temperature Accuracy: ±0.875
°C (max)
• Supply Voltage: 3.0 to 3.6 V
• Average Supply Current (1Hz conversion rate):
0.57 mA (typ)

DESCRIPTION
LM95233 is an 11-bit digital temperature sensor with
a 2-wire System Management Bus (SMBus) interface
that can monitor the temperature of two remote
diodes as well as its own temperature. The LM95233
can be used to very accurately monitor the
temperature of up to two external devices such as
microprocessors, graphics processors or diodeSelection
connected 2N3904s. The LM95233's TruTherm™
BJT beta compensation technology allows sensing of
90nm or 65nm process thermal diodes accurately.
The LM95233 reports temperature in two different
formats for +127.875°C/–128°C range and 0°C/255°C
range. The LM95233 TCRIT1, TCRIT2 and TCRIT3
outputs are triggered when any unmasked channel
exceeds its corresponding programmable limit and
can be used to shutdown the system, to turn on the
system fans or as a microcontroller interrupt function.
The current status of the TCRIT1, TCRIT2 and
TCRIT3 pins can be read back from the status
registers. Mask registers are available for further
control of the TCRIT outputs. LM95233's remote
temperature channels have programmable digital
filters to minimize unwanted TCRIT events when
temperature spikes are encountered.
For optimum flexibility and accuracy each LM95233
channel includes, registers for sub-micron process or
2N3904 diode model selection as well as offset
correction. A three level address pin allows
connection of up to 3 LM95233s to the same SMBus
master. The LM95233 includes power saving
functions such as: programmable conversion rate,
shutdown mode, and turn off of unused channels.