SCH3227-SZ-TR

Application Specific Microcontrollers Overview

The SCH3227-SZ-TR is a Microchip Technology Super I/O controller operating at 3.3V with 5V-tolerant SIO blocks. It features an LPC interface supporting 19MHz to 33MHz bus frequencies and includes an 8042 software-compatible keyboard/mouse controller. The device provides four full-function serial ports, an infrared port, and a multi-mode parallel port. Integrated hardware monitoring supports voltage sensing, remote thermal diode inputs, and programmable PWM fan control. It utilizes a 144-ball WFBGA package.

Application Specific Microcontrollers Feature Summary

• LPC Interface: Supports 19MHz to 33MHz bus frequencies with ISA Plug-and-Play compatibility.
• Keyboard Controller: 8042 software compatible with 2k Bytes ROM and 256 Bytes RAM.
• Serial Ports: Four full-function NS16C550A compatible UARTs with 16-byte FIFOs supporting up to 1.5M baud.
• Hardware Monitor: Monitors +2.5V, +5V, +12V, Vccp, VCC, Vbat, and Vtr; includes two remote thermal diode inputs.

Application Specific Microcontrollers Applications

• Desktop and server motherboard system controllers
• Industrial PC embedded systems
• Multi-port serial communication interfaces

Application Specific Microcontrollers Procurement Notes

Verify the -SZ suffix against the official datasheet to confirm the specific temperature range and package variant. Ensure the STRAPOPT pin configuration matches the required Device ID register settings (0x7F or 0x7D) for the target application logic.

Application Specific Microcontrollers Selection Notes

Select this component for designs requiring a comprehensive Super I/O solution with integrated hardware monitoring and multiple serial interfaces. Confirm that the 144-ball WFBGA package fits the PCB layout constraints and that the LPC bus timing requirements align with the host processor specifications.

Application Specific Microcontrollers Part Context

This part belongs to the SCH322x family, which serves as a successor to the SCH311x series. The SCH3227 specifically offers the highest pin count within the family, providing additional GPIOs and strap options compared to the SCH3226, SCH3224, and SCH3222 variants.

Application Specific Microcontrollers Replacement Considerations

Direct replacements include other members of the SCH322x family such as the SCH3226, SCH3224, or SCH3222, provided the reduced pin counts and feature sets meet the design requirements. Verify pinout compatibility and strap option configurations before substitution.