LM79CCVF

Thermal Management Overview

The LM79CCVF is a microprocessor system hardware monitor designed for thermal management applications. It integrates an analog-to-digital converter (ADC), comparators, and a fan speed counter to measure internal and external temperatures. The device supports I2C and ISA interfaces for communication and register management. It operates within a temperature range of -10°C to 100°C and is housed in a 44-pin MQFP package measuring 10x10 mm.

Thermal Management Feature Summary

• Integrates ADC, comparators, and fan speed counter for comprehensive thermal monitoring
• Supports both internal and external sensor inputs for flexible temperature measurement
• Provides dual interface options including I2C and ISA for system control

Thermal Management Applications

• Microprocessor system hardware monitoring
• Thermal management in computing systems
• Fan speed control and monitoring

Thermal Management Procurement Notes

Verify the manufacturer origin, as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific package type is 44-MQFP (10x10) and ensure compatibility with required I2C or ISA bus protocols. Check for any suffix variations that may indicate different temperature grades or packaging options before ordering.

Thermal Management Selection Notes

Select this component when a dedicated hardware monitor is required for processor thermal protection. It is suitable for designs needing simultaneous internal and external temperature sensing. Ensure the system board layout accommodates the 44-pin MQFP footprint and that voltage supply levels match the device specifications for reliable operation.

Thermal Management Part Context

This part belongs to the National Semiconductor hardware monitor family, distinct from the LM79XX negative voltage regulator series which shares a similar prefix but serves a completely different power management function. The LM79CCVF focuses on system health monitoring rather than voltage regulation.

Thermal Management Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and interface compatibility if considering alternative thermal monitors from other manufacturers.