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LM89 - 0.75C Accurate / Remote Diode and Local Digital Temperature Sensor

General 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.

Key Features

  • n Accurately senses die temperature of remote ICs or diode junctions Simplified Block Diagram 20041501 Pentium™ is a trademark of Intel Corporation. © 2004 National Semiconductor Corporation DS200415 www. national. com LM89 Connection Diagram MSOP-8 or SOIC-8 20041502 TOP VIEW Ordering Information Part Number LM89CIMM LM89-1CIMM LM89CIMMX LM89-1CIMMX LM89CIM LM89-1CIM LM89CIMX LM89-1CIMX Package Marking T15C T19C T15C T19C LM89CIM LM89-1CIM LM89CIM LM89-1CIM NS Package Number MUA08A (MS.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM89 ± 0.75˚C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface December 2004 LM89 ± 0.75˚C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface General 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 can be accurately determined using the LM89 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM89 remote sensor accuracy of ± 0.75˚C is factory trimmed for the series resistance and 1.