SCH3227-SZ

Application Specific Microcontrollers Overview

The Microchip Technology SCH3227-SZ is a Super I/O controller operating at 3.3V with a 5V-tolerant Super I/O block. It features an LPC interface supporting bus frequencies of 19MHz to 33MHz and includes an 8042-compatible keyboard controller, hardware monitoring, and multiple serial ports. The device supports PC99/PC2001 compliance, ACPI 2.0, and provides up to 40 GPIOs. It incorporates four full-function UARTs, an infrared port, and a parallel port. The component is housed in a 144-ball WFBGA package.

Application Specific Microcontrollers Feature Summary

• LPC Interface: Supports bus frequencies from 19MHz to 33MHz.
• Keyboard Controller: 8042 software compatible with 2k Bytes Program ROM and 256 Bytes Data RAM.
• Hardware Monitor: Monitors voltages (+2.5V, +5V, +12V, Vccp) and temperatures with programmable fan control.
• Serial Ports: Four full-function NS16C550A compatible UARTs with 16-byte FIFOs.

Application Specific Microcontrollers Applications

• Desktop and server motherboard system controllers
• Industrial PC embedded systems
• General-purpose input/output expansion

Application Specific Microcontrollers Procurement Notes

Verify the specific suffix 'SZ' against the manufacturer's official documentation to confirm the exact temperature range and package variant. Ensure compatibility with the host system's LPC bus requirements and power supply specifications before procurement.

Application Specific Microcontrollers Selection Notes

Select this model for applications requiring a comprehensive Super I/O solution with integrated hardware monitoring and keyboard/mouse controller capabilities. Consider the STRAPOPT pin configuration if legacy feature selection between SCH3114 and SCH3116 modes is required.

Application Specific Microcontrollers Part Context

The SCH3227 is part of the SCH322x family, which also includes the SCH3226, SCH3224, and SCH3222. These components share core functionalities but differ in pin counts, package sizes (84-ball to 144-ball), and specific peripheral availability such as the number of serial ports or presence of a parallel port.

Application Specific Microcontrollers Replacement Considerations

The SCH311x family serves as a predecessor. When replacing older components, verify that the STRAPOPT pin configuration aligns with the desired Device ID register values (0x7F for SCH3116 mode, 0x7D for SCH3114 mode).