ADT7476AARQZ-REEL

Thermal Management Overview

The ADT7476AARQZ-REEL is a remote thermal controller and voltage monitor manufactured by onsemi. It operates within a supply voltage range of 3.0 V to 3.6 V and features a 10-bit resolution for temperature-to-digital conversion. The device supports an operating temperature range from -40°C to +125°C with local sensor accuracy of ±0.5°C at 0°C ≤ TA ≤ 85°C. It communicates via SMBus, supporting clock frequencies up to 100 kHz.

Thermal Management Feature Summary

• Monitors up to five voltages including processor core and system rails
• Controls and monitors up to four fans using high or low frequency drive signals
• Includes one on-chip and two remote temperature sensors with extended measurement range
• Provides automatic fan speed control based on measured temperature

Thermal Management Applications

• Noise-sensitive or power-sensitive applications requiring active system cooling
• Monitoring performance impact of Intel Pentium 4 processors
• Thermal protection systems utilizing bidirectional THERM pin output

Thermal Management Procurement Notes

Verify the specific ordering suffix REEL indicates tape and reel packaging configuration. Confirm that the component meets RoHS compliance standards as stated in the datasheet. Ensure compatibility with the required SMBus interface specifications before integration into the design.

Thermal Management Selection Notes

Select this component when multiple fan control and voltage monitoring are required in a single IC. Consider the 24-lead QSOP package constraints and the need for external pull-up resistors on the SMBus lines. Evaluate the requirement for remote diode sensing capabilities alongside internal temperature monitoring.

Thermal Management Part Context

This part belongs to the ADT7476A series of thermal controllers. It serves as a comprehensive solution for system thermal management, integrating analog-to-digital conversion, fan speed counting, and limit comparison functions into a single surface-mount device suitable for complex motherboard designs.

Thermal Management Replacement Considerations

Public confirmed substitute part numbers: None available.