FDC37B727-NS

Specialized Overview

The FDC37B727-NS is a 128-pin Enhanced Super I/O controller designed for PC98/99 and ACPI 1.0 compliance. It integrates an ISA host interface with 16-bit address qualification, supporting up to 480 relocatable I/O addresses per logical device. The component includes a licensed CMOS 765B floppy disk controller compatible with the 82077AA core, two NS16C550A-compatible UARTs with 16-byte FIFOs, and a Multi-Mode parallel port featuring EPP and ECP support. Power management features include soft power control, PME, SCI/SMI support, and intelligent auto power management.

Specialized Feature Summary

• Integrates a true CMOS 765B floppy disk controller core with advanced digital data separator requiring no external filter components.
• Includes two high-speed NS16C550A compatible UARTs supporting IrDA 1.0, HP-SIR, and ASK-IR protocols.
• Features a Multi-Mode parallel port with ChiProtect circuitry for printer power-on protection and IEEE 1284 compliance.
• Supports ACPI/PME specifications with SCI/SMI interrupt options and programmable wake-up events.

Specialized Applications

• ISA Plug-and-Play compatible system designs
• PC98/PC99 architecture implementations
• ACPI compliant motherboard embedded controllers

Specialized Procurement Notes

Verify the specific suffix 'NS' against the manufacturer's official documentation to confirm package type and temperature range. Ensure the ordering information matches the exact part number required for your design. Cross-reference the datasheet revision date to confirm compatibility with current manufacturing standards.

Specialized Selection Notes

Select this component for systems requiring legacy ISA bus compatibility alongside modern ACPI power management features. It is suitable for applications needing integrated floppy, serial, and parallel interfaces without external discrete logic. Verify that the 5V operation voltage aligns with the target system's power supply rails.

Specialized Part Context

This device belongs to the FDC37B72x series of Enhanced Super I/O controllers. It is manufactured by Microchip Technology (formerly SMSC). The series provides comprehensive I/O control functions in a single 128-pin QFP package, targeting desktop and industrial PC platforms requiring robust peripheral integration.

Specialized Replacement Considerations

Consult the manufacturer's cross-reference guide for verified substitutes. Ensure any replacement maintains ISA PnP register compatibility and pinout alignment if board space is constrained.

Specialized FAQ

Does the FDC37B727-NS require external components for the floppy disk data separation?

No, the integrated advanced digital data separator does not require any external filter components, reducing board area and cost.

What is the maximum baud rate supported by the UARTs?

The UARTs support modem control circuitry including 230K and 460K baud rates.

How many IRQ options are available for configuration?

The device offers 12 standard IRQ options or Serial IRQ options for each logical device.