1FEATURES
2• TruTherm BJT Beta Compensation Technology
Supports 45nm, 65nm and 90nm Processor
Remote Diodes
• Factory Trimmed for Intel® 45 nm Processor
Thermal Diodes
• Accurately Senses Diode-Connected 2N3904
Transistors or Thermal Diodes On-board Large
Processors or ASIC's
• Accurately Senses its Own Temperature
• Integrated PWM Fan Speed Control Output
Supports High Resolution at 22.5kHz
Frequency for 4-pin Fans
• Acoustic Fan Noise Reduction with User-
Programmable 12-Step Lookup Table
• LUT Transition Fine Resolution Smoothing
Function
• Tachometer Input for Measuring Fan RPM
• Smart-Tach Modes for Measuring RPM of Fans
with Pulse-Width-Modulated Power as Shown
in Typical Application
• ALERT Output for Processor Event
Notification
• TCRIT Output for Critical Temperature System
Shutdown
• Offset Register Can Adjust for a Variety of
Thermal Diodes
• 10-Bit Plus Sign and 11-Bit Unsigned Formats,
with 1/8°C Resolution
• Extended Resolution to 1/32°C when Digital
Filter Enabled
• Resolves Remote Diode Temperatures up to
255.875°C
• SMBus 2.0 Compatible Interface, with
TIMEOUT and ARA
• 10-Pin SON Package

APPLICATIONS
• Processor Thermal Management
• Electronic Test and Office Equipment
• Industrial Controls

DESCRIPTION
The LM96163 has remote and local temperature
sensors with integrated fan control that includes
TruTherm BJT transistor beta compensation
technology for remote diode sensing. The LM96163
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 LM96163 has an offset
register to correct for errors caused by different non-
ideality factors of other thermal diodes.
The LM96163 also features an integrated, pulse- width-modulated (PWM), open-drain fan control
output. Fan speed depends on a combination of the
remote temperature reading, the lookup table and
register settings. The 12-step Lookup Table (LUT)
enables the user to program a non-linear fan speed
vs. temperature transfer function often used to quiet
acoustic fan noise. In addition a fully programmable
ramping function has been added to allow smooth
transitions between LUT setpoints.