Features • 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 MSOP and SOP packages 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. Key Specification ■  Supply Voltage 3.0 V 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 Applications • Processor/Computer System Thermal Management •   (e.g. Laptops, Desktops, Workstations, Servers) • Electronic Test Equipment • Office Electronics

LM95245 Typical Application Diagram MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image LM95245 Typical Application Diagram	Block Diagram click for larger image LM95245 Block Diagram

Datasheet

Title		Size	Date	Other Language
	LM95245 Precision Remote Diode Digital Temperature Sensor with TruTherm® BJT Beta Compensation Technology for 45nm Process	584 Kbytes	13-Mar-08	日本語

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Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM95245CIM	CMOS7	0	18406	0	0	1089000	4	309006723
LM95245CIMM	CMOS7	0	18406	0	0	1089000	4	309006723
LM95245CIMM-1	CMOS7	0	18406	0	0	1089000	4	309006723
LM95245CIMMX	CMOS7	0	18406	0	0	1089000	4	309006723
LM95245CIMMX-1	CMOS7	0	18406	0	0	1089000	4	309006723
LM95245CIMX	CMOS7	0	18406	0	0	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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