SCH5027D-NW

Specialized Overview

The SCH5027D-NW 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 utilizes an LPC interface. The device integrates hardware monitoring capabilities including temperature, voltage, and fan speed control via five PWM outputs and six tachometer inputs. It features two full-function serial ports compatible with NS16C550A UARTs, a multi-mode parallel port supporting EPP and ECP standards, and a proprietary CMOS 765B floppy disk controller. Additional functions include an 8042-compatible keyboard/mouse controller, an infrared port compliant with IrDA 1.0, motherboard glue logic, and security features such as a 32-byte key register.

Specialized Feature Summary

• Integrated hardware monitoring block with automatic fan control and thermal alerts
• Complete legacy Super I/O functionality including floppy, serial, and parallel interfaces
• Motherboard glue logic providing power management and system reset signals
• Support for ACPI 2.0 compliance and multiple low power-down modes

Specialized Applications

• Desktop computer motherboards requiring Super I/O integration
• Industrial control systems needing robust hardware monitoring
• Embedded PC designs utilizing LPC bus architecture

Specialized Procurement Notes

Verify the specific ordering suffix to confirm packaging options. The standard designation indicates a tray package, while the TR suffix denotes tape and reel availability. Confirm RoHS compliance status directly with the manufacturer or authorized distributors prior to procurement. Ensure the component meets halogen concentration values per IEC61249-2-21 specifications for your manufacturing requirements.

Specialized Selection Notes

Select this component for designs requiring a consolidated Super I/O solution with integrated hardware monitoring. Verify that the system architecture supports the LPC interface and 3.3V operation. Ensure compatibility with the ISA Plug-and-Play standard if legacy software support is required. Check pinout requirements against the 128-pin QFP package dimensions for PCB layout constraints.

Specialized Part Context

This device belongs to Microchip's Super I/O product family, specifically targeting PC99/PC2001 compliant platforms. It replaces discrete logic components by integrating keyboard, mouse, serial, parallel, and floppy controllers into a single chip. The inclusion of PECI and SMBus interfaces allows for advanced processor and system monitoring capabilities not found in older generations.

Specialized Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Designers should consult Microchip sales offices for alternative devices within the Super I/O portfolio that match specific interface or package requirements.