SCH3116-NU

Specialized Overview

The SCH3116-NU is a Super I/O controller manufactured by Microchip Technology, housed in a 128-pin VTQFP package. It operates at 3.3V with a 5V-tolerant SIO block and supports LPC bus frequencies from 19MHz to 33MHz. The device includes four full-function serial ports and two four-pin serial ports, alongside an enhanced digital data separator for floppy disk control. It features hardware monitoring for voltage and temperature, programmable fan control, and a keyboard/mouse controller compatible with the 8042 standard.

Specialized Feature Summary

• Integrated hardware monitoring with automatic fan speed control and thermal trip signaling
• Supports multiple serial port configurations including high-speed UARTs up to 1.5 Mbps
• Includes legacy functionality such as an 8042-compatible keyboard controller and IEEE 1284 parallel port
• Provides security features including a 32-byte security key register for device authentication

Specialized Applications

• PC99 and PC2001 compliant motherboard designs
• ACPI 2.0 compliant system management and power control
• Industrial or commercial embedded systems requiring legacy I/O interfaces

Specialized Procurement Notes

Verify the specific suffix requirements for your application, as the 'I' designation indicates industrial temperature range availability while blank denotes commercial range. Confirm package options and tape/reel availability directly with Microchip sales offices or authorized distributors, as packaging identifiers may not appear on the physical device. Ensure compliance with RoHS standards during procurement.

Specialized Selection Notes

Select the SCH3116-NU when six serial ports are required, distinguishing it from the SCH3112 (two ports) and SCH3114 (four ports). Choose the 'I' variant for industrial temperature ranges (-40°C to +85°C) if operating conditions exceed commercial limits (+0°C to +70°C). Verify that the absence of IDE/PCI reset outputs and power button support in this model aligns with the system design requirements.

Specialized Part Context

This component belongs to the SCH3112/SCH3114/SCH3116 product family, which shares common LPC interface and hardware monitoring capabilities. The SCH3116 specifically differentiates itself by offering the highest number of serial ports within the family, providing four full-function and two four-pin serial interfaces for expanded connectivity needs.

Specialized Replacement Considerations

SCH3112-NU and SCH3114-NU are part of the same family but offer fewer serial ports. Direct functional substitution requires verifying pin compatibility and ensuring the reduced serial port count meets system requirements.