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3:1 USB mobile high definition link switch supports both high definition video and audio data transfer to 1.3-GHz

August 16, 2011 // Paul Buckley

3:1 USB mobile high definition link switch supports both high definition video and audio data transfer to 1.3-GHz

ON Semiconductor Corporation has introduced the NCN1188, which is claimed to be the industry's first 3:1 high speed USB switch with the capacity to support the new Mobile High Definition Link (MHLTM) interface standard for High Definition (HD) video and digital audio.


Through its integrated MHLTM support, the switch enables smartphones and other portable consumer electronics to connect with HD televisions, for high speed content sharing. Two dedicated high-speed data paths can handle HD video transfer up to 720 progressive scan at 60 frames per second (fps) and 1080 interlaced at 30 fps. A multi-purpose audio path, with true-ground capability down to -2 V, supporting generic micro-USB headsets, is also included, making this the first audio capable MHLTM switch to enter the market.

Utilizing the NCN1188 device allows modern portable equipment to share a single Universal Serial Bus (USB) 2.0 or USB 3.0 receptacle for transmitting and receiving paired signals from up to three separate locations. Each of these three differential channels is fully compliant with the USB 2.0 (high speed), USB 1.1 (full speed) and USB 1.0 (low speed) standards, as well as any generic universal asynchronous receiver/transmitter (UART) protocol.

Drawing a current of just 23 microamperes (uA), the NCN1188, with an operating voltage range of 2.7 V to 5.5 V, can be supplied from a single Li-Ion battery or any protected 5 V rail. The device’s typical on capacitance (CON) is just 4.5 pF and its typical off capacitance (COFF) is 3 pF. The device has a -40 to 125 ⁰C operating junction temperature range.

The NCN1188 is offered in a  12-pin, ultra low profile, Pb-free, 2.0 mm x 1.7 mm x 0.5 mm UQFN package and  priced at $0.45 per unit in 10,000 unit quantities.

Visit ON Semiconductor at www.onsemi.com.

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