USB2223-NU-02

Controllers Overview

The USB2223-NU-02 is a fourth-generation USB 2.0 flash media controller designed for interfacing various memory cards to the USB bus. It integrates a Fast 8051 microprocessor, USB 2.0 PHY, and dedicated controllers for CompactFlash, SmartMedia, Memory Stick, and SD/MMC formats. The device features on-chip power FETs, double-buffered bulk endpoints with 512-byte buffers, and internal SRAM. It supports simultaneous operation of specific card groups and includes hardware ECC correction and security command extensions.

Controllers Feature Summary

• Integrated support for multiple flash media standards including CompactFlash, SmartMedia, Memory Stick, and Secure Digital.
• On-chip firmware handles High Speed Memory Stick and Memory Stick PRO operations without external processing.
• Built-in power FETs supply card power directly, reducing external component requirements.
• Hardware-based Error Checking and Correcting (ECC) ensures data integrity for supported media types.

Controllers Applications

• USB flash drives requiring multi-format compatibility
• Card readers supporting legacy and modern memory standards
• Portable storage devices needing integrated power management

Controllers Procurement Notes

Verify the specific suffix NU-02 against Microchip documentation to confirm package type and temperature range. Ensure the ordering code matches the required RoHS compliance status. Confirm availability through authorized distributors as lead times vary. Check for any recent product change notices affecting this specific revision.

Controllers Selection Notes

Select this controller when a single-chip solution for diverse flash media is required. It is suitable for designs needing integrated power regulation and minimal external components. Consider the 128-pin VTQFP package constraints during PCB layout. Verify that the target operating environment falls within the specified commercial temperature range.

Controllers Part Context

This component belongs to Microchip's fourth-generation USB 2.0 flash media controller family. It shares architectural similarities with the USB2227 and USB2228 models but may differ in specific pin configurations or firmware capabilities. It represents an evolution in integrating multiple card interfaces into a unified USB peripheral controller.

Controllers Replacement Considerations

Direct replacements include the USB2227 and USB2228 models from the same generation. Verify pin compatibility and firmware feature parity before substitution. Alternative solutions may require additional discrete components for power and interface logic.