Features • Accurately senses diode-connected 2N3904 transistors or thermal diodes on-board large processors or ASIC's • Accurately senses its own temperature • Factory trimmed for Intel Pentium 4 and Mobile Pentium 4 Processor-M thermal diodes • Integrated PWM fan speed control output • Acoustic fan noise reduction with User-programmable 8-step Lookup Table • Multi-function, user-selectable pin for either ^ALERT output, or Tachometer input, functions • Tachometer input for measuring fan RPM • Smart-Tach modes for measuring RPM of fans with pulse-width-modulated power as shown in typical application • Offset register can adjust for a variety of thermal diodes • 10 bit plus sign remote diode temperature data format, with 0.125°C resolution • SMBus 2.0 compatible interface, supports TIMEOUT • LM86-compatible pinout • LM86-compatible register set • LM63CIM-16 with −16°C offset remote reading to allow measurement of remote temperatures > 127.875°C • 8-pin SOIC package Description The LM63 is a remote diode temperature sensor with integrated fan control. The LM63 accurately measures: (1) its own temperature and (2) the temperature of a diode-connected transistor, such as a 2N3904, or a thermal diode commonly found on Computer Processors, Graphics Processor Units (GPU) and other ASIC's. The LM63 remote temperature sensor's accuracy is factory trimmed for the series resistance and 1.0021 non-ideality of the Intel 0.13 µm Pentium 4 and Mobile Pentium 4 Processor-M thermal diode. The LM63 has an offset register to correct for errors caused by different non-ideality factors of other thermal diodes. For the latest information contact hardware.monitor.team@nsc.com. The LM63 also features an integrated, pulse-width-modulated (PWM), open-drain fan control output. Fan speed is a combination of the remote temperature reading, the lookup table and the register settings. The 8-step Lookup Table enables the user to program a non-linear fan speed vs. temperature transfer function often used to quiet acoustic fan noise. The LM63CIM-16 remote diode temperature reading is shifted down 16°C as described by the equation: True TDIODE JUNCTION=TLM63CIM-16 + 16°C Key Specification ■  Remote Diode Temp Accuracy   (with quantization error) Ambient Temp Diode Temp IPWML Max Version Max Error 30 to 50°C 60 to 100°C 5 mA LM63C ±1.0°C 30 to 50°C 60 to 100°C 5 mA LM63D ±3.0°C 0 to 85°C 25 to 125°C 8 mA All ±3.0°C ■  Local Temp Accuracy (includes quantization error) Ambient Temp Max Error 25°C to 125°C ±3.0°C ■  Supply Voltage 3.0 V to 3.6 V  ■  Supply Current 1.3 mA (typ)  Applications • Computer Processor Thermal Management • (Laptop, Desktop, Workstations, Servers) • Graphics Processor Thermal Management • Electronic Test Equipment • Projectors • Office Equipment • Industrial Controls

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

Datasheet

Title		Size	Date	Other Language
	LM63 ±1°C/±3°C Accurate Remote Diode Digital Temperature Sensor with Integrated Fan Control	689 Kbytes	5-Aug-09	日本語

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Design Tools

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Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM63CIMA	CMOS7	0	18406	0	0	1089000	4	309006723
LM63CIMAX	CMOS7	0	18406	0	0	1089000	4	309006723
LM63DIMA	CMOS7	0	18406	0	0	1089000	4	309006723
LM63DIMAX	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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