SCH3106-NU

Specialized Overview

The SCH3106-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 19.2 MHz to 33 MHz. The device integrates a licensed CMOS 765B floppy disk controller, an 8042-compatible keyboard/mouse controller, four full-function serial ports, two four-pin serial ports, and a multi-mode parallel port. It includes hardware monitoring capabilities for voltage, temperature, and fan control, alongside a watchdog timer and reset generation logic. The component is housed in a 128-pin VTQFP package.

Specialized Feature Summary

• Integrated legacy Super I/O functionality including an 8042-based keyboard controller, IEEE 1284 parallel port, and multiple high-speed UARTs.
• Hardware monitoring block capable of measuring internal and external temperatures, voltages, and controlling fan speeds via PWM outputs.
• Supports ACPI 2.0 compliance with sophisticated power control circuitry and programmable wake-up events.
• Includes a true CMOS 765B floppy disk controller core ensuring 100% IBM compatibility.

Specialized Applications

• Desktop and embedded motherboard designs requiring Super I/O integration
• Systems needing integrated hardware monitoring and thermal management
• Legacy peripheral interfaces such as serial ports and floppy drives

Specialized Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm packaging options. The NU suffix indicates a 128-pin VTQFP package. Confirm RoHS compliance status through the manufacturer's environmental information pages. Ensure availability matches current production status as components may transition between active and end-of-life phases.

Specialized Selection Notes

Select this component for applications requiring a comprehensive Super I/O solution with integrated hardware monitoring. Verify that the system design supports the LPC bus interface and accommodates the 128-pin VTQFP footprint. Consider the commercial temperature range limits when designing for industrial environments. Ensure software drivers are compatible with the ISA Plug-and-Play register set.

Specialized Part Context

The SCH3106 belongs to Microchip's Super I/O controller family, targeting PC99/PC2001 compliant platforms. It consolidates multiple legacy interface controllers into a single chip, reducing board space and component count. The device serves as a bridge between the LPC bus and various peripheral interfaces, providing essential system management functions.

Specialized Replacement Considerations

Check Microchip's official product selector for direct replacements or pin-compatible alternatives within the Super I/O portfolio. Verify functional equivalence regarding the LPC interface timing and GPIO mapping before substitution.

Specialized FAQ

What is the maximum frequency supported by the LPC interface?

The LPC interface supports frequencies ranging from 19.2 MHz to 33 MHz.

Does the SCH3106 support infrared communication?

Yes, it includes a multiprotocol Infrared Port compliant with IrDA 1.0 standards.

How many general purpose I/O pins are available?

The device provides 40 General Purpose I/O pins.