ADT7467ARQZ-REEL

Overview

The ADT7467ARQZ-REEL is a dbCOOL remote thermal monitor and fan controller manufactured by onsemi. It operates within a supply voltage range of 3.0 V to 5.5 V and supports SMBus 2.0 electrical specifications with a fixed address of 0x2E. The device features one local temperature sensor and two remote diode sensors, providing an extended measurement range from -64°C to +191°C. It includes series resistance cancellation for remote channels and controls up to four fans via three PWM outputs. The unit is housed in a QSOP-16 package.

Feature Summary

• Controls and monitors up to four fans with high or low frequency drive signals
• Includes dynamic TMIN control mode to intelligently optimize system acoustics
• Features enhanced acoustic mode to reduce user perception of changing fan speeds
• Provides thermal protection via bidirectional THERM pin output

Applications

• Noise-sensitive computer systems requiring active cooling
• Power-sensitive applications needing optimized fan speed management
• Monitoring Intel Pentium 4 processor performance impact
• Systems requiring critical thermal protection against overheating

Procurement Notes

Verify the specific REEL suffix indicates tape-and-reel packaging configuration distinct from tube variants. Confirm RoHS compliance and Pb-free status as stated in the datasheet. Ensure the fixed SMBus address 0x2E matches system bus requirements. Check for halide-free package availability if required by manufacturing standards.

Selection Notes

Select this component when noise reduction is critical due to its dynamic TMIN and enhanced acoustic modes. Choose it over the ADT7460 for extended temperature ranges up to 191°C and series resistance cancellation capabilities. Ensure the design utilizes the SMBus interface for all control functions and accommodates the fixed 7-bit address.

Part Context

The ADT7467 serves as an upgrade to the ADT7460, offering improved thermal management features. It maintains pin and register map compatibility while adding high-frequency drive options and fail-safe cooling mechanisms. The device integrates automatic fan speed control loops to maintain minimum acoustic noise levels during operation.

Replacement Considerations

The ADT7460 is a compatible predecessor with lower feature sets. Verify that the absence of high-frequency drive support and series resistance cancellation in the ADT7460 meets application requirements.