SCH3221I-7U-TR

Specialized Overview

The SCH3221I-7U-TR is a 3.3V (5V tolerant) I/O controller featuring an LPC interface, compliant with PC99, PC2001, and ACPI standards. It integrates four full-function NS16C550A-compatible UARTs supporting baud rates up to 460 Kbps, 33 general-purpose I/O pins, and an infrared communications controller. The device includes a watchdog timer, two LED drivers, and extensive programmable wake-up event support via serial modem RI inputs, GPIOs, and the watchdog. It operates within an industrial temperature range of -40°C to +85°C and is housed in a 64-ball WFBGA RoHS-compliant package.

Specialized Feature Summary

• Supports Low Pin Count (LPC) bus interface for host communication
• Integrates four high-speed serial ports with 16-byte FIFOs
• Includes infrared communications controller with IrDA v1.2 support
• Provides extensive programmable wake-up event capabilities

Specialized Applications

• Industrial control systems requiring robust I/O management
• Embedded platforms utilizing LPC bus architecture
• Systems necessitating infrared data exchange protocols

Specialized Procurement Notes

Verify the specific suffix 'I-7U-TR' against the manufacturer's current documentation to confirm the industrial temperature grade (-40°C to +85°C) and tape-and-reel packaging configuration. Ensure that the ordering information matches the exact part number required for your bill of materials, as suffixes define critical environmental and handling specifications.

Specialized Selection Notes

Select this component when a system requires a dedicated Super I/O controller with native LPC connectivity and multiple serial interfaces. It is suitable for designs needing integrated infrared support and low-power wake-up logic without external bridge chips. Confirm that the host processor supports the LPC protocol and that the 64-ball WFBGA package fits the available PCB real estate.

Specialized Part Context

This part belongs to Microchip Technology's SCH3221 series of LPC I/O controllers. The series provides a consolidated solution for legacy I/O functions in modern embedded architectures. The SCH3221 variant specifically targets applications demanding high reliability across wide temperature ranges while maintaining compatibility with established PC industry standards.

Specialized Replacement Considerations

Consult official Microchip documentation for confirmed cross-reference part numbers. Do not substitute with generic I/O controllers lacking native LPC support or identical pinout configurations without rigorous electrical verification.