Features Accurately senses die temperature of remote ICs or diode junctions Offset register allows sensing a variety of thermal diodes accurately 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 MSOP and SOIC packages Description The LM86 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM86 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 LM86 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM86 remote sensor accuracy of ±0.75°C is factory trimmed for the 1.008 typical non-ideality factor of the mobile Pentium™ III thermal diode. The LM86 has an Offset register to allow measuring other diodes without requiring continuous software management. Contact hardware.monitor.team@nsc.com to obtain the latest data for new processors. Activation of the ALERT# output occurs when any temperature goes outside a preprogrammed window set by the HIGH and LOW temperature limit registers or exceeds the T_CRIT temperature limit. Activation of the T_CRIT_A# occurs when any temperature exceeds the T_CRIT programmed limit. The LM86 is pin and register compatible with the the Analog Devices ADM1032 and Maxim MAX6657/8. Key Specification Supply Voltage 3.0V to 3.6V Supply Current 0.8mA (typ) 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) TA=30°C to 50°C, TD=60°C to 100°C ±1.0°C (max) TA=0°C to 85°C, TD=25°C to 125°C ±3.0°C (max) Applications Computer System Thermal Management (e.g. Laptop, Desktop, Workstations, Server) Electronic Test Equipment Office Electronics

Also Recommended LM95231▲ Better Temperature Resolution

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

Parameters / Values	LM86	LM95231
Remote Diode Thermal Sensors	1	2
Temperature Accuracy (+/-)	0.75 deg C	1.25 deg C
Supply Min	3 Volt	3 Volt
Quiescent Current	1.7 mA	0.363 mA
Temperature Min	0 deg C	25 deg C
Temperature Max	125 deg C	140 deg C
Interface Type	2-Wire Serial	2-Wire Serial
Programmable Setpoints	Yes	No
Resolution	11 bits	13 bits
Resolution degC/LSB	0.125	0.03125
Supply Max	3.6 Volt	3.6 Volt
Shut down	Yes	Yes
Interrupt Outputs	2
Fault Queue	Yes	No

Datasheets

Title		Size	Date	Other Language
	LM86 ±0.75°C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface	414 Kbytes	30-Apr-03	日本語

Other Technical Documents

Title		Type	Date
	Remote diodes yield accurate temperature measurements	External Article	2003-07-10
	Cost Effective Partitioning of IO and Management Functions in PCs - Introduction of SensorPath™ Technology	Technology Edge	2004-01-01

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM86CIM/NOPB LM86CIM RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 675 AVNET-EM Worldwide 414 DIGI-KEY Worldwide 0 MOUSER Worldwide 570 RS COMPONENTS Worldwide 105 TAYLOR Americas 910 TECHMOSA Asia Pacific 156	$0.71 each at 1K+ pcs	rail of 95
LM86CIMM/NOPB LM86CIMM RoHS Status	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1885 AVNET-EM Worldwide 4000 DIGI-KEY Worldwide 0 FARNELL Europe and Asia 57 MOUSER Worldwide 935 NEWARK Americas 386 TAYLOR Americas 7136	$0.71 each at 1K+ pcs	reel of 1000
LM86CIMMX/NOPB LM86CIMMX RoHS Status	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty AITG Asia Pacific 1001 DIGI-KEY Worldwide 0 MOUSER Worldwide 3500	$0.71 each at 1K+ pcs	reel of 3500
LM86CIMX/NOPB LM86CIMX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 5000 DIGI-KEY Worldwide 0 MOUSER Worldwide 2478 TAYLOR Americas 5000	$0.71 each at 1K+ pcs	reel of 2500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM86.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM86 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM86EVAL/NOPB	LM86 - ±0.75°C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface	Full production Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0	$78.00 each	1
Description: The LM86 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM86 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 LM86EVAL is the evaluation board for the LM86. Features: Accurately senses die temperature of remote ICs or diode junctions Offset register allows sensing a variety of thermal diodes accurately 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 MSOP and SOIC packages Contents: Evaluation Board user's guide thank you letter evaluation board license agreement

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM86CIM/NOPB LM86CIM	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT LM86 CIM
LM86CIMM/NOPB LM86CIMM	29.851 30.002	MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT T10C
LM86CIMMX/NOPB LM86CIMMX	29.851 30.002	MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT T10C
LM86CIMX/NOPB LM86CIMX	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT LM86 CIM

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM86.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM86 is located at RoHS Status.

Design Tools

Title	Size	Date
SensorEval Software for Thermal Mangement Products

CAD Symbols and Models Download LM86 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM86CIM	CMOS7	0	21301	0	0	1584000	3	449464325
LM86CIMM	CMOS7	0	21301	0	0	1584000	3	449464325
LM86CIMMX	CMOS7	0	21301	0	0	1584000	3	449464325
LM86CIMX	CMOS7	0	21301	0	0	1584000	3	449464325

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.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM86.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM86 is located at RoHS Status.