Key facts
- Brand
- Maxim
- Model
- MAX6640
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-11
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MAXIM NBY7751 handbook
The MAX6640 is a temperature‑monitoring IC that provides two PWM fan‑control outputs and an SMBus interface for temperature read‑back. It operates from a 3.0 V to 3.6 V supply and can measure temperatures from –40 °C up to +150 °C.
The device includes programmable thresholds for over‑temperature (OT), thermistor (THERM) and fan‑fail (FANFAIL) alerts, and offers a 0.125 °C resolution. Package options are 16‑pin QSOP and 5 mm × 5 mm TQFN.
Maxim MAX6640 specifications
| Operating Supply Voltage Range | 3.0 V to 3.6 V |
|---|---|
| Fan‑Speed Measurement Accuracy | ±4 % |
| Maximum Measurable Temperature | +150 °C |
| Number of PWM Fan Outputs | 2 (open‑drain, up to 13.5 V pull‑up) |
Source: Maxim MAX6640 2‑Channel Temperature Monitor Datasheet
All Maxim MAX6640 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How many PWM fan‑control outputs does the MAX6640 provide?
It provides two PWM outputs, labeled PWM1 and PWM2.
From: MAXIM NBY7751 handbook
What communication interface does the MAX6640 use?
It uses a standard SMBus 2‑wire/I²C‑compatible serial interface.
How many PWM fan outputs are provided?
The MAX6640 provides two open‑drain PWM fan outputs that can be pulled up to 13.5 V.