SCH3224-SY-TR

Application Specific Microcontrollers Overview

The Microchip Technology SCH3224-SY-TR is a Super I/O controller operating at 3.3V with a 5V-tolerant SIO block. It features an LPC interface supporting bus frequencies of 19MHz to 33MHz and includes two full-function NS16C550A-compatible UARTs with 16-byte FIFOs, plus two additional 4-pin serial ports. The device integrates a hardware monitor for voltage and temperature sensing with programmable fan control, a parallel port with EPP/ECP support, and a keyboard/mouse controller. It utilizes a 100-ball WFBGA package.

Application Specific Microcontrollers Feature Summary

• LPC Interface: Supports 19MHz to 33MHz bus frequencies with ISA Plug-and-Play compatibility.
• Serial Ports: Includes two full-function UARTs (up to 1.5 Mbps) and two 4-pin serial ports.
• Hardware Monitor: Monitors multiple voltages and temperatures with automatic PWM fan control.
• Parallel Port: Provides IEEE 1284 compliant EPP/ECP modes with ChiProtect circuitry.

Application Specific Microcontrollers Applications

• Motherboard glue logic integration
• Industrial PC systems requiring robust I/O management
• Embedded controllers needing hardware monitoring capabilities

Application Specific Microcontrollers Procurement Notes

Verify the specific suffix 'SY' against official documentation to confirm the exact temperature range and package variant. Confirm that the TR designation indicates reel packaging. Ensure the design accommodates the 100-ball WFBGA footprint and respects internal pin constraints not brought out in this specific model.

Application Specific Microcontrollers Selection Notes

Select the SCH3224 over other family members if exactly two full-function serial ports are required alongside a parallel port. Verify that the 24 available GPIOs meet system requirements. Note that IDE/PCI reset outputs and power button controls are not available on this specific part number.

Application Specific Microcontrollers Part Context

This component belongs to the SCH322x family, succeeding the SCH311x series. Unlike the SCH3227 or SCH3226, the SCH3224 lacks IDE/PCI reset buffers and power button support but retains the parallel port and hardware monitoring functions within a 100-ball package.

Application Specific Microcontrollers Replacement Considerations

Direct replacements include other members of the SCH322x family such as the SCH3227 or SCH3226, provided the system can accommodate their different pin counts and feature sets. The SCH3114 or SCH3116 may serve as legacy alternatives if pin compatibility allows.