| Local sensor accuracy (Max) (+/- C) | 3 |
| Type | Fan Controller |
| Operating temperature range (C) | -40 to 125 |
| Supply voltage (Min) (V) | 3 |
| Interface type | I2C, SMBus |
| Supply voltage (Max) (V) | 3.6 |
| Supply current (Max) (uA) | 825 |
| Temp resolution (Max) (bits) | 11 |
| Features | Tachometer, ALERT |
| Remote channels (#) | 1 |
| Addresses | 1 |
| Rating | Catalog |
- 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
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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.