USB2250-NU-05-DR1

Controllers Overview

The Microchip USB2250-NU-05-DR1 is a USB 2.0 compliant, Hi-Speed mass storage class peripheral controller designed for reading and writing to over 24 popular flash media formats. It supports CompactFlash (CF), SmartMedia (SM), xD-Picture Card (xD), Memory Stick (MS), Secure Digital (SD), and MultiMediaCard (MMC) families. The device features a fully integrated single-chip solution with an 8051 8-bit microprocessor operating at 60 MHz, providing 64 KB ROM and 14 KB RAM. It includes four independent internal card power FETs capable of 200 mA each with short circuit protection. The component operates within a commercial temperature range of 0°C to +70°C and utilizes a 128-pin VTQFP package.

Controllers Feature Summary

• Supports multiple simultaneous card insertions with flexible assignment of Logical Unit Numbers (LUNs) and card type associations.
• Features hardware-controlled data flow architecture for self-mapped media and pipelined hardware support for non-self-mapped media access.
• Includes an onboard 24 MHz crystal driver circuit and optional external clock input capability.
• Provides OEM selectable configuration options including vendor, product, and language IDs, manufacturer strings, and serial number customization.

Controllers Applications

• Flash Media Card Readers/Writers
• Printers
• Desktop and Mobile PCs
• Consumer A/V Equipment
• Vista ReadyBoost

Controllers Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type, temperature range, and tape/reel specifications. Ensure compatibility with required firmware versions and external memory configurations if utilizing custom firmware or EEPROM features. Cross-reference datasheet revision history for any operational updates or errata applicable to this part number.

Controllers Selection Notes

Select the USB2250 variant for commercial temperature operation (0°C to +70°C). Choose the USB2250i variant if industrial temperature range (-40°C to +85°C) is required. Confirm that the application requires support for xD-Picture Cards, as these are not supported by the USB2251 derivative. Evaluate pinout requirements for the 128-pin VTQFP package to ensure proper signal routing and signal integrity implementation.

Controllers Part Context

The USB2250 series serves as a comprehensive solution for multi-slot flash media controllers. It integrates necessary USB interface components, including termination resistors and pull-up/pull-down networks, reducing external component count. The device is optimized for low latency interrupt handling and reduced memory footprint, making it suitable for space-constrained embedded applications requiring high-speed data transfer capabilities.

Controllers Replacement Considerations

Public confirmed substitute part numbers: USB2250I-NU-06, USB2251-NU-05, USB2250I-NU-05.