LPC47N267-MV

Specialized Overview

The LPC47N267-MV is a Super I/O controller operating at 3.3V with 5V tolerance, housed in a 100-pin STQFP package (12mm x 12mm body). It integrates an LPC bus host interface and an X-Bus interface supporting up to four external components via I/O cycles only. The device includes a CMOS 765B floppy disk controller with a 16-byte FIFO, two NS16C550-compatible UARTs with 16-byte send/receive FIFOs, and a multi-mode parallel port with EPP/ECP support. It features 29 GPIOs, four IRQ inputs, and supports ACPI 1.0b and PC99 standards.

Specialized Feature Summary

• X-Bus Interface for connecting multiple external components with write protection capabilities
• Integrated CMOS 765B Floppy Disk Controller with vertical recording support
• Dual High-Speed UARTs with Infrared Communications Controller support
• Multi-Mode Parallel Port with ChiProtect circuitry for printer power-on safety

Specialized Applications

• Notebook computer system control
• Desktop motherboard embedded controllers
• Industrial PC peripheral management

Specialized Procurement Notes

Verify the manufacturer source carefully as this component originates from SMSC, which was acquired by Microchip Technology. Confirm that the specific ordering suffix matches the required package variant. Check current availability status as legacy Super I/O parts may have limited supply chains or end-of-life implications requiring careful inventory planning.

Specialized Selection Notes

Select this component when an LPC-based Super I/O solution with dedicated X-Bus expansion capability is required. Ensure the design utilizes 3.3V logic levels while accommodating 5V tolerant pins where necessary. Verify that the application requires the specific combination of floppy, dual serial, and parallel interfaces provided on-chip without needing memory cycle support on the X-Bus.

Specialized Part Context

This part belongs to the LPC47 series of Super I/O controllers designed for PC architectures. It serves as a central peripheral controller replacing discrete logic chips for floppy, serial, and parallel ports. The device simplifies board design by integrating these functions into a single 100-pin package compliant with industry standards.

Specialized Replacement Considerations

LPC47N267-MN