SCH3114I-NU

Specialized Overview

The SCH3114I-NU is a Super I/O controller manufactured by Microchip Technology, designed for PC99 and PC2001 compliant systems. It operates at 3.3V with a 5V tolerant SIO block and features an LPC interface supporting frequencies from 19MHz to 33MHz. The device includes four full-function serial ports, a hardware monitor, and 40 general-purpose I/O pins. It is housed in a 128-pin VTQFP package (14x14mm) and supports an industrial temperature range of -40°C to +85°C.

Specialized Feature Summary

• Integrated legacy functionality including an 8042-based keyboard/mouse controller, IEEE 1284 parallel port, and CMOS 765B floppy disk controller
• Hardware monitoring capabilities with voltage, temperature sensing, and programmable automatic fan control
• Supports ACPI 2.0 compliance and sophisticated power control circuitry for multiple low power-down modes

Specialized Applications

• Industrial embedded control systems requiring robust I/O management
• Motherboard designs needing integrated legacy peripheral support
• Systems requiring precise hardware monitoring and thermal management

Specialized Procurement Notes

Verify the specific ordering suffix against current Microchip documentation to confirm package type and temperature grade. Confirm component availability status as distribution channels may list obsolete inventory. Ensure compatibility with existing system architecture before procurement.

Specialized Selection Notes

Select this component when an LPC interface is required alongside extensive legacy I/O integration. The SCH3114 variant specifically provides four full-function serial ports compared to fewer options in other family members. Verify that the 128-pin VTQFP package fits the target PCB layout constraints.

Specialized Part Context

This part belongs to the SCH3112/SCH3114/SCH3116 product family. The SCH3114 distinguishes itself by offering four full-function serial ports, whereas the SCH3112 offers two and the SCH3116 offers four full-function plus two four-pin serial ports. All variants share similar core Super I/O and hardware monitoring features.

Specialized Replacement Considerations

SCH3112I-NU and SCH3116I-NU are direct family members with identical packages but different serial port configurations.