FDC37N958FRTQFP

Controllers Overview

The FDC37N958FR is an Ultra I/O controller manufactured by SMSC, housed in a 208-pin TQFP package. It integrates an 8051-based keyboard and power management controller with a shared Flash interface. The device includes four PS/2 ports, a real-time clock, and a true CMOS 765B floppy disk controller featuring a 16-byte data FIFO. Communication capabilities are provided by two 16C550A compatible UARTs, with the second UART supporting IrDA Ver 1.1 Fast IR compliance.

Controllers Feature Summary

• Integrates an 8051-based keyboard and power management controller for system control
• Includes a CMOS 765B floppy disk controller with advanced digital data separation
• Supports IrDA Ver 1.1 Fast IR compliance through dedicated serial port engine
• Provides multiple connectivity options including four PS/2 ports and internal keyboard scan

Controllers Applications

• System designs requiring integrated parallel and serial port interfaces
• Applications utilizing internal keyboard scanning or external PS/2 peripherals
• Systems incorporating infrared communication via Fast IR support
• Designs requiring GPIO expansion and real-time clock functionality

Controllers Procurement Notes

Verify the specific suffix against official SMSC documentation to confirm package type and temperature range. Ensure the ordering code matches the required pin configuration and electrical specifications. Cross-reference the part number with current datasheets to validate availability and manufacturing status before procurement.

Controllers Selection Notes

Select this component for systems needing a consolidated I/O solution with embedded power management. Consider the 208-pin TQFP footprint during PCB layout planning. Evaluate the need for IrDA support and floppy controller integration to determine if this single-chip approach meets the design requirements compared to discrete solutions.

Controllers Part Context

This device belongs to the SMSC FDC37 series of Super I/O controllers. It shares functional similarities with models like the FDC37C672 and FDC37N869 but offers distinct packaging and feature combinations tailored for ultra I/O applications. The series generally targets PC98/99 and ACPI compliance standards.

Controllers Replacement Considerations

Check for direct substitutes within the FDC37 family such as the FDC37N869 or FDC37C672. Verify pin compatibility and register set alignment before substitution. Confirm that alternative parts support the same voltage levels and interface requirements.