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LM63 Datasheet(PDF) 1 Page - Texas Instruments |
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LM63 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 41 page LM63 1 2 3 4 5 6 7 8 VDD D+ D- PWM SMBCLK SMBDAT ALERT / TACH GND LM63 www.ti.com SNAS190E – SEPTEMBER 2002 – REVISED MAY 2013 LM63 ±1°C/±3°C Accurate Remote Diode Digital Temperature Sensor with Integrated Fan Control Check for Samples: LM63 1 FEATURES DESCRIPTION The LM63 is a remote diode temperature sensor with 23 • Accurately Senses Diode-Connected 2N3904 integrated fan control. The LM63 accurately Transistors or Thermal Diodes On Board Large measures: (1) its own temperature and (2) the Processors or ASICs temperature of a diode-connected transistor, such as • Accurately Senses its Own Temperature a 2N3904, or a thermal diode commonly found on Computer Processors, Graphics Processor Units • Factory Trimmed for Intel® Pentium® 4 and (GPU) and other ASIC's. The LM63 remote Mobile Pentium 4 Processor-M Thermal Diodes temperature sensor's accuracy is factory trimmed for • Integrated PWM Fan Speed Control Output the series resistance and 1.0021 non-ideality of the • Acoustic Fan Noise Reduction With User- Intel 0.13 µm Pentium 4 and Mobile Pentium 4 Programmable 8-Step Lookup Table Processor-M thermal diode. The LM63 has an offset register to correct for errors caused by different non- • Multi-Function, User-Selectable Pin for Either ideality factors of other thermal diodes. ALERT Output, or Tachometer Input, Functions The LM63 also features an integrated, pulse-width- modulated (PWM), open-drain fan control output. Fan • Tachometer Input for Measuring Fan RPM speed is a combination of the remote temperature • Smart-Tach Modes for Measuring RPM of Fans reading, the lookup table and the register settings. With Pulse-Width-Modulated Power as Shown The 8-step Lookup Table enables the user to in Typical Application program a non-linear fan speed vs. temperature • Offset Register can Adjust for a Variety of transfer function often used to quiet acoustic fan Thermal Diodes noise. • 10 Bit Plus Sign Remote Diode Temperature CONNECTION DIAGRAM Data Format, With 0.125°C Resolution • SMBus 2.0 Compatible Interface, Supports TIMEOUT • LM86-Compatible Pinout • LM86-Compatible Register Set • 8-Pin SOIC Package APPLICATIONS Figure 1. 8-Pin SOIC (D Package) • Computer Processor Thermal Management (Laptop, Desktop, Workstations, Servers) • Graphics Processor Thermal Management • Electronic Test Equipment • Projectors • Office Equipment • Industrial Controls 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 Intel, Pentium are registered trademarks of Intel Corporation. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2002–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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