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LM95245CIM/NOPB-LM95245CIMM-LM95245CIMMX/NOPB-LM95245CIMMX-1/NOPB
Precision Remote Diode Digital Temperature Sensor with TruTherm BJT Beta Compensation (45nm)
LM95245
www.ti.com SNIS148G –OCTOBER 2007–REVISED MARCH 2013
Precision Remote Diode Digital Temperature Sensor with TruTherm® BJT Beta
Compensation Technology for 45nm Process
Checkfor Samples: LM95245
1FEATURES DESCRIPTIONThe LM95245is an 11-bit digital temperature sensor
Remote and Local Temperature Channels witha 2-wire System Management Bus (SMBus)
• Targeted for Intel 45nm Processor Diodes interface and TruTherm technology that can monitor
Two Formats: −128°Cto +127.875°C and 0°Cto the temperatureofa remote diodeas wellasits own
255.875°C temperature. The LM95245 can be used to very
accurately monitor the temperature of external
• Digital Filter for Remote Channel devices such as microprocessors. TruTherm
• Programmable TCRIT and OS Thresholds technology allows the LM95245to precisely monitor
Programmable Shared Hysteresis Register thermal diodes foundin 90 nm and smaller geometry
processes. The LM95245is specifically targeted for
• Diode Fault Detection Intel processors on 45nm process. LM95245 reports
• Mask, Offset, and Status Registers temperaturein two different formats for +127.875°C/-
• SMBus 2.0 Compatible Interface, Supports 128°C range and 0°C/255°C range. The LM95245
TIMEOUT T_CRIT and OS outputs are asserted when either
unmasked channel exceedsits programmed limit and
• Programmable Conversion Rate for Best can be usedto shutdown the system,to turn on the
Power Consumption system fans,orasa microcontroller interrupt function.
• Three-Level Address Pin The current statusof the T_CRIT and OS pins canbe
Standby Mode One-Shot Conversion Control read back from the status registers via the SMBus
interface. All limits havea shared programmable
• Pin-for-Pin Compatible With the LM95235 and hysteresis register.
LM86, LM89, LM99The remote temperature channelof the LM95245 has
• 8-Pin VSSOP and SOIC Packages programmable digital filter. The LM95245 is
targeted fora typical Intel® processor ona 45 nm,65
APPLICATIONS nmor 90nm process, and has an offset register for
• Processor/Computer System Thermal maximum flexibility and best accuracy.
Management (For Example, Laptops, The LM95245 hasa three-level address pin to
Desktops, Workstations, Servers) connectupto3 devicesto the same SMBus master,
• Electronic Test Equipment thatis shared with the OS output. The LM95245 has a programmable conversion rate register anda
standby modeto save power. One conversion canbe
triggeredin standby modeby writingto the one-shot register.
to 3.6VA (typ)to 105°C, ±0.75 (max)to 125°C, ±1.5 (max)16to 0.4 Hz
