1FEATURES
2• Remote and Local Temperature Channels
• Targeted for Intel 45nm Processor Diodes
• Two Formats: −128°C to +127.875°C and 0°C to
255.875°C
• Digital Filter for Remote Channel
• Programmable TCRIT and OS Thresholds
• Programmable Shared Hysteresis Register
• Diode Fault Detection
• Mask, Offset, and Status Registers
• SMBus 2.0 Compatible Interface, Supports
TIMEOUT
• Programmable Conversion Rate for Best
Power Consumption
• Three-Level Address Pin
• Standby Mode One-Shot Conversion Control
• Pin-for-Pin Compatible With the LM95235 and
LM86, LM89, LM99
• 8-Pin VSSOP and SOIC Packages

APPLICATIONS
• Processor/Computer System Thermal
Management (For Example, Laptops,
Desktops, Workstations, Servers)
• Electronic Test Equipment
• Office Electronics

KEY SPECIFICATIONS
• Supply Voltage 3.0 to 3.6 V
• Supply Current, Conv. Rate = 1 Hz 350 μA (typ)
• Remote Diode Temperature Accuracy
– TA = 25°C to 85°C; TD = 50°C to 105°C, ±0.75
°C (max)
– TA = 25°C to 85°C; TD = 40°C to 125°C, ±1.5
°C (max)
• Local Temperature Accuracy
– TA = 25°C to 100°C, ±2.0 °C (max)
• Conversion Rate, Both Channels 16 to 0.4 Hz

DESCRIPTION
The LM95245 is an 11-bit digital temperature sensor
with a 2-wire System Management Bus (SMBus)
interface and TruTherm technology that can monitor
the temperature of a remote diode as well as its own
temperature. The LM95245 can be used to very
accurately monitor the temperature of external
devices such as microprocessors. TruTherm
technology allows the LM95245 to precisely monitor
thermal diodes found in 90 nm and smaller geometry
processes. The LM95245 is specifically targeted for
Intel processors on 45nm process. LM95245 reports temperature in two different formats for +127.875°C/-
128°C range and 0°C/255°C range. The LM95245
T_CRIT and OS outputs are asserted when either
unmasked channel exceeds its programmed 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 T_CRIT and OS pins can be
read back from the status registers via the SMBus
interface. All limits have a shared programmable
hysteresis register.
The remote temperature channel of the LM95245 has
a programmable digital filter. The LM95245 is
targeted for a typical Intel® processor on a 45 nm, 65
nm or 90nm process, and has an offset register for
maximum flexibility and best accuracy.
The LM95245 has a three-level address pin to
connect up to 3 devices to the same SMBus master,
that is shared with the OS output. The LM95245 has
a programmable conversion rate register and a
standby mode to save power. One conversion can be
triggered in standby mode by writing to the one-shot
register.