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.
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.
Intel is a trademark of Texas Instruments. Pentium is a trademark of Texas Instruments. All trademarks are the property of their respective owners.
| Local sensor accuracy (max) | 3 |
| Type | Fan Controller |
| Operating temperature range (°C) | 0 to 125 |
| Supply voltage (min) (V) | 3 |
| Interface type | SMBus |
| Supply voltage (max) (V) | 3.6 |
| Features | ALERT, PWM output, Tachometer |
| Supply current (max) (µA) | 2000 |
| Temp resolution (max) (Bits) | 8 |
| Remote channels (#) | 1 |
| Addresses | 1 |
| Rating | Catalog |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
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