LPC47U322QFP

Overview

The LPC47U322QFP is an Enhanced Super I/O controller manufactured by SMSC, designed for PC and embedded system applications. It integrates keyboard, mouse, parallel port, serial ports, and hardware monitoring functions into a single chip compliant with ACPI 2.0 and PC2001 standards. The device utilizes the Low Pin Count (LPC) interface for communication with the host processor, reducing pin count and board space requirements compared to traditional ISA-based controllers. Packaged in a QFP-128 format, it supports multiple voltage levels and provides comprehensive power management capabilities.

Feature Summary

• Integrates enhanced Super I/O functionality including keyboard, mouse, parallel, and serial interfaces within a single component.
• Supports ACPI 2.0 and PC2001 compliance for advanced system power management and configuration.
• Utilizes the Low Pin Count (LPC) interface to minimize interconnect complexity and reduce PCB footprint.
• Includes integrated hardware monitoring features for thermal and voltage supervision.

Applications

• Desktop computer mainboards requiring integrated I/O control
• Embedded systems needing compact Super I/O solutions
• Industrial PCs requiring robust hardware monitoring and legacy interface support

Procurement Notes

Verify the manufacturer designation as SMSC or Microchip Semiconductor, noting that SMSC was acquired by Microchip Technology. Confirm the package type is QFP-128 and check for specific ordering suffixes if available in official documentation. Ensure the component meets required environmental standards such as RoHS compliance before procurement. Cross-reference part numbers carefully due to potential naming variations between SMSC and Microchip product lines.

Selection Notes

Select this component when a highly integrated Super I/O solution with LPC interface support is required for ACPI-compliant systems. It is suitable for designs prioritizing reduced pin counts and simplified board layout over discrete I/O components. Consider its compatibility with existing BIOS/UEFI implementations and hardware monitoring requirements. Evaluate thermal performance and voltage tolerance against specific application constraints.

Part Context

The LPC47U322QFP belongs to the LPC47 series of Super I/O controllers from SMSC. This family focuses on providing comprehensive I/O and power management integration for PC architectures. Similar parts in the series may vary in interface counts or specific feature sets but share the core LPC-based architecture and ACPI compliance. The QFP package variant offers a surface-mount solution suitable for automated assembly processes.

Replacement Considerations

Direct replacements should be sought within the SMSC/Microchip LPC47 series. Verify functional equivalence regarding interface types and ACPI support. Consult official substitution guides for cross-referencing compatible models with similar pinouts and electrical characteristics.