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ONSEMI NCT7491RQR2G Remote Thermal Fan Controller

The NCT7491 is a remote thermal monitor and fan controller featuring PECI 3.0 interface and SMBus compatibility. It monitors CPU and remote temperatures, voltage channels, and fan speeds with programmable limits, automatic PWM control, and support for multiple temperature and fan sources. It offers fail-safe thermal control via THERM and SMBALERT outputs, customizable hysteresis, and flexible configuration for system temperature management, including advanced fan speed adjustment, fault detection, and GPIO control. The device is available in QFN24 and QSOP24 packages, operating from 3.0V to 3.6V, making it ideal for high-reliability thermal management in complex systems.

Authorized Distributors
Source:DigiKey
Part No:NCT7491RQR2G
Stock:2528
Inv Date:06-10-2026
Price: Unit price: $4.36
Buy/RFQ:
Part No:NCT7491RQR2G
Stock:0
Inv Date:06-11-2026
Price: Unit price: $3.04
Buy/RFQ:

ONSEMI NCT7491RQR2G Remote Thermal Fan Controller Specifications:

  • Supply Voltage: 3.0 V to 3.6 V
  • Package Types: QFN24, QSOP24
  • Operating Temperature Range: -40°C to +125°C
  • Monitor Remote and Local Temperatures, Voltages, Fan Speeds
  • Supports PECI 3.0 and SMBus interfaces with address configuration
  • Automated PWM Fan Control with Up to 3 PWM Outputs
  • Fan Speed Measurement via Tach Inputs with configurable pulses
  • Programmable Temperature and Voltage Limits with Alert and Fault reporting
  • Fail-safe thermal control via THERM assertions and SMBALERT signals
  • GPIO pins for digital I/O and system signaling
  • Advanced features: hysteresis, look-up table control, automatic resistance cancellation
  • Supports multiple temperature sources and external SMBus sensors
  • Fault detection with status and mask registers for robust system management
  • Designed for high-reliability industrial and server applications

Buy the ON Semiconductor Series Thermal Monitoring Fan Controller: NCT7491RQR2G

Discover the versatile ON Semiconductor NCT7491 remote thermal monitor and fan controller, featuring PECI 3.0 interface and SMBus compatibility. It supports up to 4 remote temperature sensors, programmable voltage and fan speed limits, and automatic PWM fan control with up to 3 outputs. With built-in fail-safe options like THERM assertion and SMBALERT, it ensures system safety in high-reliability environments. Compact in QFN24 and QSOP24 packages, operating from 3.0V to 3.6V, this device is ideal for efficient thermal management in computing, industrial, and server systems. Purchase online today to integrate advanced thermal control into your system.

Buy ON Semiconductor NCT7491RQR2G now and experience unmatched reliability and performance in thermal management solutions.

Frequently Asked Questions

Where can I buy ONSEMI NCT7491RQR2G?

You can click on the BUY or RFQ button to purchase NCT7491RQR2G from an authorized ONSEMI distributor.

How do I troubleshoot issues or seek technical support for part NCT7491RQR2G?

You can download the NCT7491RQR2G datasheet or visit the ONSEMI website for support.

Who is the manufacturer of NCT7491RQR2G?

ONSEMI

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