MAX6641
MAX6641
PRODUCTIONSMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller
Industry's Smallest, Single Temperature Sensor and Fan Controller in MSOP Package
- Part Models
- 4
- 1ku List Price
- Starting From $2.36
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Overview
- Tiny 3mm x 5mm µMAX Package
- Thermal Diode Input
- Local Temperature Sensor
- Open-Drain PWM Output for Fan Drive
- Programmable Fan Control Characteristics
- Automatic Fan Spin-Up Ensures Fan Start
- ±1°C Remote Temperature Accuracy (+60°C to +145°C)
- Controlled Rate of Change Ensures Unobtrusive Fan-Speed Adjustments
- Temperature Monitoring Begins at Power-On for Fail-Safe System Protection
- Active-Low OT Output for Throttling or Shutdown
The MAX6641 temperature sensor and fan controller accurately measures the temperature of its own die and the temperature of a remote pn junction. The device reports temperature values in digital form using a 2-wire serial interface. The remote pn junction is typically the emitter-base junction of a common-collector pnp on a CPU, FPGA, or ASIC.
The 2-wire serial interface accepts standard System Management Bus (SMBus™) write byte, read byte, send byte, and receive byte commands to read the temperature data and program the alarm thresholds. The temperature data controls a PWM output signal to adjust the speed of a cooling fan, thereby minimizing noise when the system is running cool, but providing maximum cooling when power dissipation increases. The device also features an over-temperature alarm output to generate interrupts, throttle signals, or shut down signals. The MAX6641 operates from supply voltages in the 3.0V to 5.5V range and typically consumes 500µA of supply current.
The MAX6641 is available in a slim 10-pin µMAX® package and is available over the -40°C to +125°C automotive temperature range.
Applications
- Desktop Computers
- Industrial
- Networking Equipment
- Notebook Computers
- Servers
- Workstations
Documentation
Data Sheet 1
Application Note 1
Design Note 1
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX6641AUB90+ | MINI_SO | ||
| MAX6641AUB90+T | MINI_SO | ||
| MAX6641AUB94+ | MINI_SO | ||
| MAX6641AUB94+T | MINI_SO |
This is the most up-to-date revision of the Data Sheet.
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