Datasheet Microchip USB2251I-NU-06

USB2250/50i/51/51i
Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
General Description
The Microchip USB2250/50i/51/51i is a USB 2.0 compliant, Hi-Speed mass storage class peripheral controller intended for reading and writing to more than 24
popular flash media formats from the CompactFlashВ®
(CF), SmartMediaTM (SM), xD-Picture CardTM (xD)1,
Memory StickВ® (MS), Secure Digital (SD), and MultiMediaCardTM (MMC) families.
The USB2250/50i/51/51i is a fully integrated, single
chip solution capable of ultra high performance operation. Average sustained transfer rates exceeding 35
MB/s are possible if the media and host can support
those rates. Highlights 128-pin VTQFP (14x14 mm) RoHS compliant
package Targeted for applications in which single or
"combo" media sockets are used Supports multiple simultaneous card insertions Flexible assignment of number of LUNs and how
card types are associated with the LUNs Hardware-controlled data flow architecture for all
self-mapped media Pipelined hardware support for access to nonself-mapped media Order number with “i” denotes the version that
supports the industrial temperature range of -40ВєC
to 85ВєC Hardware Features Single chip flash media controller with non-multiplexed interface for independent card sockets Flash Media Specification Revision Compliance
-CompactFlash 4.1
-Secure Digital 2.0
-MultiMediaCard 4.2 MMC Streaming Mode support
-Memory Stick 1.43
-Memory Stick Pro Format 1.02
-Memory Stick Duo Format 1.10 …