MAX6653AEE+

Thermal Management Overview

The MAX6653AEE+ is an ACPI-compliant local and remote-junction temperature sensor and fan controller in a 16-pin QSOP package. It measures its own die temperature and the temperature of a remote PN junction with ±1°C accuracy from +60°C to +100°C. The device provides 0.125°C resolution for both local and remote measurements. It controls DC cooling fan speed via PWM output based on measured temperatures. Operating supply voltage ranges from +3V to +5.5V, and it operates over a temperature range of -40°C to +125°C.

Thermal Management Feature Summary

• ACPI-compliant local and remote-junction temperature sensing with high accuracy
• SMBus 2-Wire serial interface with timeout protection and programmable alarms
• Automatic or manual PWM fan-speed control with monitoring and watchdog features
• Hard-wired default set points for fail-safe protection against SMBus lockups

Thermal Management Applications

• Personal Computers
• Servers
• Workstations
• Telecom Equipment
• Networking Equipment

Thermal Management Procurement Notes

Verify the specific ordering suffix 'AEE+' corresponds to the 16-pin QSOP package and the -40°C to +125°C operating temperature range as documented in the official datasheet. Confirm that the device meets all required electrical specifications for your system design, including supply voltage and interface compatibility. Ensure proper handling and storage conditions are maintained to preserve component integrity prior to installation.

Thermal Management Selection Notes

Select this component when ACPI compliance and precise thermal monitoring are required for microprocessor-based systems. It is suitable for applications needing both local die and remote junction temperature measurement. Consider the availability of hard-wired default set points for critical events if system reliability is a priority. Ensure the system supports the SMBus interface and can handle the required pull-up resistor configurations for digital outputs.

Thermal Management Part Context

The MAX6653AEE+ belongs to the MAX6653/MAX6663/MAX6664 family of temperature monitors and PWM fan controllers. These devices are designed for microprocessor-based systems requiring comprehensive thermal management. The MAX6653 variant specifically includes additional shutdown outputs (SDL and SDR) for enhanced safety compared to other members of the series.

Thermal Management Replacement Considerations

MAX6663AEE+

Thermal Management FAQ

How does the MAX6653AEE+ ensure system reliability if the SMBus becomes locked?

The device features an SMBus timeout mechanism to prevent locking the bus. Additionally, it has hard-wired default values for critical temperature set points via the CRIT0 and CRIT1 pins, ensuring proper control of critical temperature events even if the SMBus is locked.

What is the accuracy of the remote temperature measurement?

The remote temperature measurement accuracy is ±1°C from +60°C to +100°C. Outside this range, the accuracy may vary, with typical errors specified in the electrical characteristics table.