LM89 Series

±0.75°C remote and local temperature sensor with SMBus interface and 2 addresses for bus sharing

Catalog

±0.75°C remote and local temperature sensor with SMBus interface and 2 addresses for bus sharing

Part	Output Type	Sensing Temperature - Remote [Max]	Operating Temperature [Max]	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case	Package / Case [custom]	Package / Case	Features	Mounting Type	Sensing Temperature - Local [Max]	Accuracy - Highest (Lowest)	Resolution	Supplier Device Package	Package / Case [y]	Package / Case [x]
Texas Instruments LM89-1CIMMX	SMBus	85 °C	125 °C	3.6 V	3 V	8-MSOP 8-TSSOP	0.118 in	3 mm	One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b
Texas Instruments LM89-1CIMX	SMBus	85 °C	125 °C	3.6 V	3 V	8-SOIC			One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b	8-SOIC	3.9 mm	0.154 in
Texas Instruments LM89-1CIMM	SMBus	85 °C	125 °C	3.6 V	3 V	8-MSOP 8-TSSOP	0.118 in	3 mm	One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b
Texas Instruments LM89-1CIM	SMBus	85 °C	125 °C	3.6 V	3 V	8-SOIC			One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b	8-SOIC	3.9 mm	0.154 in
Texas Instruments LM89-1CIMMX/NOPB	SMBus	85 °C	125 °C	3.6 V	3 V	8-MSOP 8-TSSOP	0.118 in	3 mm	One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b
Texas Instruments LM89-1CIM/NOPB	SMBus	85 °C	125 °C	3.6 V	3 V	8-SOIC			One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b	8-SOIC	3.9 mm	0.154 in
Texas Instruments LM89-1DIMMX/NOPB	SMBus	85 °C	125 °C	3.6 V	3 V	8-MSOP 8-TSSOP	0.118 in	3 mm	One-Shot Output Switch Programmable Limit Shutdown Mode	Surface Mount	85 °C	3 °C	7 b 10 b
Texas Instruments LM89CIMM	SMBus	85 °C	125 °C	3.6 V	3 V	8-MSOP 8-TSSOP	0.118 in	3 mm	One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b
Texas Instruments LM89CIMM/NOPB	SMBus	85 °C	125 °C	3.6 V	3 V	8-MSOP 8-TSSOP	0.118 in	3 mm	One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b
Texas Instruments LM89CIMX	SMBus	85 °C	125 °C	3.6 V	3 V	8-SOIC			One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	Surface Mount	85 °C	3 °C	7 b 10 b	8-SOIC	3.9 mm	0.154 in

Catalog

±0.75°C remote and local temperature sensor with SMBus interface and 2 addresses for bus sharing

Key Features

• Accurately Senses Die Temperature of Remote ICsor Diode JunctionsOffset Register Allows Accurate Sensing of a Varietyof Thermal DiodesOn-Board Local Temperature Sensing10-Bit Plus Sign Remote Diode Temperature Data Format,0.125°C ResolutionT_CRIT_AOutput Useful for System ShutdownALERTOutput Supports SMBus 2.0 ProtocolSMBus 2.0 Compatible Interface, Supports TIMEOUT8-Pin VSSOP and SOIC PackagesKey Specifications:Supply Voltage: 3.0 V to 3.6 VLocal Temp Accuracy (includes quantization error)TA= 25°C to 125°C ±3.0 °C (max)Remote Diode Temp Accuracy (includes quantization error)TA= 30°C, TD= 80°C ±0.75 °C (max)Accurately Senses Die Temperature of Remote ICsor Diode JunctionsOffset Register Allows Accurate Sensing of a Varietyof Thermal DiodesOn-Board Local Temperature Sensing10-Bit Plus Sign Remote Diode Temperature Data Format,0.125°C ResolutionT_CRIT_AOutput Useful for System ShutdownALERTOutput Supports SMBus 2.0 ProtocolSMBus 2.0 Compatible Interface, Supports TIMEOUT8-Pin VSSOP and SOIC PackagesKey Specifications:Supply Voltage: 3.0 V to 3.6 VLocal Temp Accuracy (includes quantization error)TA= 25°C to 125°C ±3.0 °C (max)Remote Diode Temp Accuracy (includes quantization error)TA= 30°C, TD= 80°C ±0.75 °C (max)

Description

The LM89 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM89 accurately measures its own temperature as well as the temperature of an external device, such as processor thermal diode or diode-connected transistor such as the 2N3904. The temperature of any ASIC, GPU, FPGA or MCU can be accurately determined using the LM89 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM89 has an Offset register to allow calibration for different nonideality factors without requiring software management. Activation of theALERToccurs when any temperature goes outside a preprogrammed window set by the HIGH and LOW limit registers or exceeds the T_CRIT limit. Activation of theT_CRIT_Aoccurs when any temperature exceeds the T_CRIT programmed limit. The LM89 is pin and register compatible with the LM86, LM90, LM99, On Semiconductor ADM1032 and Maxim MAX6657/8. The LM89C and the LM89-1C have the same functions but different SMBus slave addresses, allowing multiple LM89's on a bus. LM89-1D’s default local T_CRIT temperature limit is 105°C; all other versions are 85°C. The LM89 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM89 accurately measures its own temperature as well as the temperature of an external device, such as processor thermal diode or diode-connected transistor such as the 2N3904. The temperature of any ASIC, GPU, FPGA or MCU can be accurately determined using the LM89 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM89 has an Offset register to allow calibration for different nonideality factors without requiring software management. Activation of theALERToccurs when any temperature goes outside a preprogrammed window set by the HIGH and LOW limit registers or exceeds the T_CRIT limit. Activation of theT_CRIT_Aoccurs when any temperature exceeds the T_CRIT programmed limit. The LM89 is pin and register compatible with the LM86, LM90, LM99, On Semiconductor ADM1032 and Maxim MAX6657/8. The LM89C and the LM89-1C have the same functions but different SMBus slave addresses, allowing multiple LM89's on a bus. LM89-1D’s default local T_CRIT temperature limit is 105°C; all other versions are 85°C.