USB97C243-JN-04

Controllers Overview

The USB97C243-JN-04 is a USB Bus Controller manufactured by SMSC, designed for floppy disk controller applications. It operates with a maximum clock frequency of 14.318 MHz and supports a maximum supply voltage of 3.6 V. The component is housed in a 100-pin LFQFP package measuring 12 mm x 12 mm with a maximum seated height of 1.6 mm. It features an internal regulator requiring external capacitor selection for output pins. The device ensures complete USB Specification 1.1 compatibility and includes a built-in USB transceiver.

Controllers Feature Summary

• Complete system solution including USB Mass Storage Class compliant drivers and firmware for Windows 98/2000 environments
• Supports multiple floppy disk formats including 640K, 720K, 1.44M, 1.2M Windows 98 J, and 1.2M NEC DOS 6.x
• Compatible with both UFI and SFF8070i command sets for flexible drive integration

Controllers Applications

• Floppy disk drive interface design
• USB mass storage class compliant peripheral development
• Bootable floppy BIOS implementation

Controllers Procurement Notes

Verify the specific suffix -JN-04 against official SMSC documentation to confirm package type and temperature range specifications. Ensure that the required external capacitors for the internal regulator are included in the bill of materials. Confirm driver availability for the target operating system environment prior to finalizing procurement plans.

Controllers Selection Notes

Select this component when a dedicated USB-to-floppy interface is required with native support for legacy disk formats. It is suitable for designs needing integrated USB 1.1 compliance without external transceivers. Consider the 100-pin QFP footprint constraints during PCB layout planning.

Controllers Part Context

This part belongs to the SMSC USB97 series of bus controllers, which provide integrated solutions for connecting storage devices to USB ports. The USB97C243 variant specifically targets floppy disk emulation and control, distinguishing itself from other series members like the USB97C242 flash drive controller or the USB97CFDC2 model through its format-specific firmware capabilities.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.