USB2251

Microchip's USB225x family of Hi-Speed USB 2.0 flash media card controllers provides an ultra-fast interface between a USB host controller and today's most popular flash media cards. Offering comprehensive USB 2.0 compliance and interoperability, the USB225x product family is engineered to provide flexibility for system designers to choose independent or simultaneous access to a wide selection of flash media readers. It provides secure memory format options via external or internal memory, and is capable of high-performance throughput with new formats such as CF-Ultra Direct Memory Access (UDMA) and Memory Stick PRO-HG.

The USB225x consists of a USB 2.0 device transceiver, fast 8051 microprocessor and Compact Flash® (CF), Memory Stick™ (MS), Smart Media™ (SM) and Secure Digital (SD) controllers in a single chip. Microchip's new ultra-fast card readers are well-suited for performance-intensive Microsoft® Windows Vista® applications such as ReadyBoost™. PC system performance can be improved by up to 10% when employing ReadyBoost with an Microchip flash media reader.*

*Results are based on actual measurements on evaluation platforms developed by Microchip, and are meant only as a general guideline, not as a guarantee. Actual customer results may vary based on a number of factors, including board layout and measurement technique.

Microchip makes the following part-numbered device available for purchase only by customers who are xD-Picture Card licensees: USB2250. By purchasing or ordering any of such devices, Buyer represents, warrants, and agrees that Buyer is a duly licensed Licensee under an xD-Picture Card™ License Agreement with Fuji Photo Film Co., Ltd., Olympus Optical Co., Ltd., and Toshiba Corporation; and that Buyer will maintain in effect such xD-Picture Card license and will give Microchip reasonable advance notice of any termination or expiration of such xD-Picture Card license, but in no event less than five days advance notice. Microchip may discontinue making such devices available for purchase by Buyer and/or discontinue further deliveries of such devices if such xD-Picture Card license shall expire, terminate, or cease to be in force, or if Buyer is or becomes in default of such xD-Picture Card license.

Features
  • Optimized for Hi-Speed performance and versatility
  • Supports Smart Media™/xD-Picture Card™, Memory Stick™/Memory Stick PRO™/Memory Stick PRO-HG™, MultiMediaCard™/Secure Digital and Compact Flash®/Compact Flash-UDMA interfaces
  • Capable of high-performance throughput > 35MB/s with new Hi-Speed formats – CF-UDMA, MS PRO-HG
  • Well-suited for PC applications utilizing Microsoft® ReadyBoost™ to improve system performance
  • External or internal ROM option
  • Secure memory format options supported via external or internal memory
  • Supports individual or any combination of sockets
  • Industrial-temp option - designed to meet -40° to 85°C requirements
  • Optional, small footprint, 36-pin QFN package for single or fully-multiplexed card interface designs or space-constrained applications
  • Desktop/Notebook PCs
  • Multi-function Printers
  • Digital TVs
  • Monitors
  • Consumer Audio/Video Devices
  • Stand-alone Flash Media Reader/Writers
  • Digital Picture Frames
  • Media Players
  • Set-top Boxes
  • Gaming Consoles
  • Automobile/Home Audio Systems
  • Industrial Applications
Parameter
Parameter Name Value Value
Description USB 2.0 Multi-Slot Flash Media Controller USB 2.0 Multi-Slot Flash Media Controller
Upstream Port USB 2.0 USB 2.0
USB Speed Hi Speed Hi Speed
Downstream Ports CF, SD, MMC, MS CF, SD, MMC, MS
MCU Interface USB, UART USB, UART
Tx Buffer Size (bytes) 4k 4k
Rx Buffer Size (bytes) 4k 4k
GPIOs 32 32
Op Voltage (V) 3.3 3.3
ROM I/F I2C I2C
UART Yes Yes
Compact Flash Yes Yes
Secure Digital/ MM cards 1 1
Memory Stick Yes Yes
Logical Unit Num (LUN) 4 4
Temp Range Min (°C) -40 -40
Temp Range Max (°C) 85 85
Documents
USB2250/USB2250i/USB2251/USB2251i Ultra Fast USB 2.0 Multi-Slot Flash Media ConData Sheets10/26/2015387KB
AN18.16 - PCB Design Guidelines for USB224x/i & USB225x/i ControllersAppNote04/27/2011281KB
AN26.21 - USB Device Design ChecklistAppNote08/10/2015386KB
USB2250 IBIS Model usb2250_t128_fstx.ibsIBIS06/22/2008168KB
USB2250 IBIS Model usb2250_t128_hstx.ibsIBIS06/22/2008155KB
OBJ files for USB225xSoftware Library03/11/2014
EVB-USB225x Evaluation Board Bill of MaterialsBOM06/15/200922KB
EVB-USB225x Evaluation Board Schematic, OrCADCAD Resources06/15/20092746KB
EVB-USB225x Evaluation Board Gerber FilesGerber Files04/09/2008778KB
USB2250/USB2250i/USB2251/USB2251i Ultra Fast USB 2.0 Multi-Slot Flash Media ConProduct Briefs09/29/2009242KB
EVB-USB225x Evaluation Board Schematic, PDFSchematics06/15/200978KB
EVB-USB225x Evaluation Board User ManualUser Guides07/17/2009377KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
USB2251I-NU-06128TQFP-40C to +85CTRAY3.182.652.412.332.30
USB2251I-NU-06-CAG128TQFP-40C to +85CTRAY3.502.922.652.562.53
USB2251-NU-06128TQFP0C to +70CTRAY2.361.971.791.731.71
相关开发工具
Similar Devices
ProductUSB SpeedDownstream PortsOp. Voltage (V)GPIOsPrice5K
MCP2200Full SpeedUART3.0 to 5.58$1.40
MCP2210Full SpeedSPI3.3 to 5.59$1.40
MCP2221Full SpeedI2C/SMBus, UART3.0 to 5.54$1.55
MCP2221AFull SpeedI2C/SMBus, UART3.0 to 5.54$1.37
USB2227Hi SpeedCF, SD, MMC, SDIO, MS, xD3.315$1.75
USB2228Hi SpeedCF, SD, MMC, SDIO, MS, xD3.315$1.75
USB2229Hi SpeedCF, SD, MMC, SDIO, MS, xD3.312$3.17
USB2230Hi SpeedCF, SD, MMC, SDIO, MS, xD3.312$3.17
USB2240Hi SpeedSD, MMC, MS, xD3.34$1.43
USB2241Hi SpeedSD, MMC, MS3.35$1.43
USB2244Hi SpeedSD, MMC3.37$1.36
USB2250Hi SpeedCF, SD, MMC, MS, xD3.332$1.71
USB2251Hi SpeedCF, SD, MMC, MS3.332$1.71
USB2601Hi SpeedCF, SD, MMC, SDIO, MS1.8, 3.314
USB2602Hi SpeedCF, SD, MMC, SDIO, MS, xD1.8, 3.314
USB2640Hi SpeedSD, MMC, SDIO, MS, xD3.34$2.30
USB2641Hi SpeedSD, MMC, SDIO, MS3.36$2.30
USB2642Hi SpeedSD, MMC, eMMC3.31$2.75
USB2660Hi SpeedSD, MMC, SDIO, MS3.36$2.69
USB4640Hi SpeedSD, MMC, SDIO, MS3.34$2.30
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
USB2251-NU-050.5575002.888889128TQFP14x14x1mmMatte Tine3
USB2251I-NU-060.5575002.888889128TQFP14x14x1mmMatte Tine3
USB2251-NU-060.5575002.888889128TQFP14x14x1mmMatte Tine3
USB2251I-NU-06-CAG0.5575002.888889128TQFP14x14x1mmMatte Tine3
USB2250/USB2250i/USB2251/USB2251i Ultra Fast USB 2.0 Multi-Slot Flash Media Con USB2251
AN18.16 USB2251
AN26.21 USB3347
EVB-USB225x Evaluation Board Bill of Materials - EVB-USB225x Evaluation Board Bill of Materials EVB-USB2250
EVB-USB225x Evaluation Board Gerber Files - EVB-USB225x Evaluation Board Gerber Files EVB-USB2250
USB2250/USB2250i/USB2251/USB2251i Ultra Fast USB 2.0 Multi-Slot Flash Media Con USB2251
EVB-USB225x Evaluation Board Schematic, PDF - EVB-USB225x Evaluation Board Schematic, PDF EVB-USB2250
EVB-USB225x Evaluation Board User Manual - EVB-USB225x Evaluation Board User Manual EVB-USB2250
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