ADT7473ARQZ-REEL

Overview

The ADT7473ARQZ-REEL is a dBCOOL remote thermal monitor and fan controller designed for noise-sensitive applications. It integrates one on-chip and two remote temperature sensors, supporting an extended measurement range up to 191°C. The device controls up to four fans using high or low frequency drive signals and features series resistance cancellation. It operates within a supply voltage range of 3 V to 3.6 V and supports I2C/SMBus interfaces in a QSOP-16 package.

Feature Summary

• Integrates one local and two remote temperature sensors with series resistance cancellation
• Controls up to four fans with automatic speed adjustment based on thermal data
• Supports dynamic TMIN control mode to optimize system acoustics
• Provides thermal protection via THERM output and input circuitry

Applications

• Noise-sensitive computer systems requiring active cooling
• Power-sensitive electronic devices needing efficient thermal management
• Systems monitoring Intel Pentium 4 processor performance impact
• Applications requiring intelligent acoustic optimization

Procurement Notes

Verify the specific suffix REEL against official onsemi documentation to confirm packaging format and reel specifications. Confirm current availability status as distribution channels may list this component as discontinued or limited stock. Ensure compatibility with SMBus 2.0 electrical specifications required by the design. Cross-reference the part number with authorized distributors to validate authenticity and lot traceability before procurement.

Selection Notes

Select this component when multiple remote sensor inputs are required alongside multi-fan control. The integrated series resistance cancellation simplifies wiring for remote diodes. Consider the extended temperature range if operating in high-heat environments. Verify interface compatibility with the host controller's I2C or SMBus capabilities. Evaluate the acoustic benefits of the dynamic TMIN mode for user-facing equipment.

Part Context

This part belongs to the ADT7473 family of dBCOOL controllers from onsemi. It is functionally similar to the ADT7473-1 variant but may differ in specific configuration options or pinout details. The family is designed for hub and fan control in computing platforms. Other variants in the series include the ADT7476A for different channel counts.

Replacement Considerations

Public confirmed substitute part numbers: ADT7473ARQZ-RL7, ADT7473ARQZ-1R7.