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.