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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 476kB) Download   E-Mail

Description

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.

Key Features		Applications/Uses
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 OT-bar Output for Throttling or Shutdown		Desktop Computers Industrial Networking Equipment Notebook Computers Servers Workstations

Diagram

Typical Application Circuit

Application Notes

Application Note 3502: Effect of PC Board Trace Width on Remote-Diode Temperature-Sensor Accuracy - MAX6641 Application Note 4024: SPI/I²C Bus Lines Control Multiple Peripherals - MAX6641

Design Guides

Thermal Management (PDF) Low-Power Notebook ICs (PDF)

Reliability Reports

Show FIT data for: MAX6641 Request Reliability Report for: MAX6641

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-14 of 14

MAX6641	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6641AUB90			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6641AUB92			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6641AUB92-T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6641AUB94			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6641AUB94-T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6641AUB96			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6641AUB96-T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6641AUB90+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6641AUB92+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6641AUB92+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6641AUB94+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6641AUB94+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6641AUB96+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6641AUB96+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2004-05-06

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