LPC47M142-NC

Application Specific Microcontrollers Overview

The LPC47M142-NC is a Super I/O controller manufactured by SMSC, designed for PC and notebook applications. It integrates hardware monitoring capabilities alongside standard peripheral interfaces. The device operates at 3.3 volts with 5-volt tolerant inputs in the SIO block. It supports the LPC interface and complies with ACPI standards. Key features include fan control outputs and tachometer inputs, programmable wake-up events, and general-purpose I/O pins. It also includes an ISA plug-and-play compatible register set and intelligent auto power management.

Application Specific Microcontrollers Feature Summary

• Integrates hardware monitoring and Super I/O functions within a single CMOS package
• Supports LPC interface with ACPI compliance for modern system management
• Provides programmable wake-up event interfaces and system management interrupt support
• Includes intelligent auto power management and multiple power-down modes

Application Specific Microcontrollers Applications

• Desktop computer motherboard designs requiring integrated I/O and monitoring
• Notebook computer systems needing low-power Super I/O solutions
• Industrial control systems utilizing ISA-compatible register sets
• Hardware monitoring implementations requiring fan speed control and temperature sensing

Application Specific Microcontrollers Procurement Notes

Verify the specific suffix 'NC' against official SMSC documentation to confirm pinout and functional compatibility. Ensure the source document explicitly lists this exact part number rather than a generic family member. Cross-reference the manufacturer designation as SMSC or its successor entities to avoid sourcing errors from obsolete listings.

Application Specific Microcontrollers Selection Notes

Select this component when a combined Super I/O and hardware monitoring solution is required for legacy ISA compatibility alongside modern LPC interfaces. Consider the 3.3V operation with 5V tolerance for mixed-voltage board designs. Evaluate the available GPIO count and fan control channels against system requirements before choosing over standalone controllers.

Application Specific Microcontrollers Part Context

This component belongs to the LPC47M series of Super I/O chips produced by SMSC. These devices were widely used in PC architectures during the transition from ISA to LPC buses. The series typically combines floppy disk controllers, serial ports, and parallel ports with hardware monitoring functions into a single package to reduce board space and complexity.

Application Specific Microcontrollers Replacement Considerations

Check for direct replacements within the LPC47M family such as the LPC47M120 or LPC47M182 if pin-to-pin compatibility is confirmed by datasheets. Verify that any substitute maintains the same package type and voltage specifications.