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USB-to-SDIO Host IC Brings Instant microSD-compatibility to USB Ports

Sep 17, 2015

VUB300 USB-to-SDIO IC from Saelig

VUB300 USB-to-SDIO IC from Saelig

Saelig Company, Inc.’s VUB300 is a unique IC that converts a USB interface into an SDIO Host Interface, suited to SD or microSD cards.  The VUB300 is a single-chip USB-to-SDIO hardware bridge that allows SDIO- and SD-compliant devices to be connected to any host PC via its USB   port. The VUB300 is the ideal solution when a target system has no spare SDIO ports but does have available USB ports.  The capability and intelligence for handle both the USB and SDIO protocols is all in hardware, allowing the IC to seemless translate data between the two formats. A unique and important user benefit of VUB300 is its universal support for any SDIO device, allowing it to run with any manufacturer's existing driver and application software without the need for any modification - drivers integrate into the standard operating system SD/SDIO driver stack.  The SDIO Host function conforms to the SDIO Host specification with a generic USB “wrapped” interface to extend SDIO host controller support to the USB bus. Key features of the device include low power, small package size and high data throughput. With a USB2.0 Hi-Speed connection, transfer rates of up to 480 Mbps are possible, but the VUB300 is also backward-compatible with Full-Speed USB2.0 and USB1.1 ports.

The VUB300’s SDIO interface supports 1bit or 4bit SDIO and SD Interrupt with automatic card detection. It is also suitable for bus-powered applications, requiring < 450mW from a 3.3V supply. RoHS-compliantVUB300 is instantly live on power-up and includes an integrated USB 2.0 Hi-Speed PHY.  The VUB300 is supplied as a 36-pin 6 x 6mm QFN device with industrial temperature range (-40 to +85degC).

The VUB300 was designed in Europe by Elan Digital Systems, and will find applications in PC motherboards, Express cards, USB Dongles, embedded PCs, ultra-mobile PCs, smart phones, portable internet devices, etc.  Supported operating systems include Windows, Linux, and Mac.

The VUB300 is available now from Saelig Co. Inc. Fairport, NY.  A ready-made VUB300 Evaluation Board is also available. 

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