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 the ALERT occurs when any temperature goes outside a preprogrammed window set by the HIGH and LOW limit registers or exceeds the T_CRIT limit. Activation of the T_CRIT_A occurs 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.

• Accurately Senses Die Temperature of Remote ICs or Diode Junctions
• Offset Register Allows Accurate Sensing of a Variety of Thermal Diodes
• On-Board Local Temperature Sensing
• 10-Bit Plus Sign Remote Diode Temperature Data Format, 0.125°C Resolution
• T_CRIT_A Output Useful for System Shutdown
• ALERT Output Supports SMBus 2.0 Protocol
• SMBus 2.0 Compatible Interface, Supports TIMEOUT
• 8-Pin VSSOP and SOIC Packages
• Key Specifications:
  • Supply Voltage: 3.0 V to 3.6 V
  • Local 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)

• Local sensor accuracy (Max) (+/- C)
• 3
• Type
• Remote
• Operating temperature range (C)
• 0 to 125
• Supply voltage (Min) (V)
• 3
• Interface type
• I2C, SMBus
• Supply voltage (Max) (V)
• 3.6
• Supply current (Max) (uA)
• 1700
• Temp resolution (Max) (bits)
• 8
• Features
• ALERT
• Remote channels (#)
• 1
• Addresses
• 2
• Rating
• Catalog

LM89的完整型号有：LM89-1CIMM/NOPB、LM89-1CIMMX/NOPB、LM89-1DIMM/NOPB、LM89-1DIMMX/NOPB、LM89CIMM/NOPB、LM89CIMMX/NOPB、LM89CIMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM89-1CIMM/NOPB，工作温度：0 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM89-1CIMM/NOPB的批量USD价格：1.422（1000+）

LM89-1CIMMX/NOPB，工作温度：0 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：3500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM89-1CIMMX/NOPB的批量USD价格：1.185（1000+）

LM89-1DIMM/NOPB，工作温度：0 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM89-1DIMM/NOPB的批量USD价格：1.422（1000+）

LM89-1DIMMX/NOPB，工作温度：0 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：3500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM89-1DIMMX/NOPB的批量USD价格：1.185（1000+）

LM89CIMM/NOPB，工作温度：0 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM89CIMM/NOPB的批量USD价格：1.422（1000+）

LM89CIMMX/NOPB，工作温度：0 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：3500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM89CIMMX/NOPB的批量USD价格：1.185（1000+）

LM89CIMX/NOPB，工作温度：0 to 125，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM89CIMX/NOPB的批量USD价格：1.185（1000+）

DIGITALTEMPSENSORSEVM-SW — 用于硬件监控器和数字温度传感器的评估板软件

Evaluation Board Software for Hardware Monitors and Digital Temperature Sensors

LM90SW-LINUX — 用于 LM90 的 Linux 驱动程序

The Linux driver supports the LM90 series of Remote and Local Temp Sensors. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

• (...)

SENSOREVAL — 用于硬件监控器和数字温度传感器的评估板软件

SensorEval
SensorEval 软件支持通过 USB 接口连接的 TI 最新温度传感器和硬件监控器评估板。此外，该软件还允许访问直接安装在支持 Intel 芯片组的主板上的传感器。

• 下载 SensorEval 软件和手册
• 为以下各项提供 Windows XP 支持：
  • USB 评估板（LM93 除外）
  • Intel ICHx 接口（ADCS9888、LM32、LM40、LM41、LM71、LM95010 和 LM95071 除外）
  • “无硬件”模式支持在没有任何硬件的情况下运行软件