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NXP touts 'smallest' ULPI Hi-Speed USB transceivers

Posted: 05 Mar 2007 ?? ?Print Version ?Bookmark and Share

Keywords:transceiver? Hi-Speed USB? ASIC? SoC? ASICs?

NXP Semiconductors has announced the availability of new-generation UTMI+ Low-Pin Interface (ULPI) Hi-Speed USB transceivers, developed specifically for mobile phone designs.

With the smallest device in this family measuring 2.2-by-2.25-by-0.6mm, in a 0.4mm ball pitch, these transceivers are touted to be the smallest in the market. Moreover, as actual USB usage in mobile phones is lower compared to overall talk and standby time, these transceivers avoid battery drain by consuming only 0.5?A in power-down mode.

Family members
This family of new-generation ULPI Hi-Speed USB transceivers has four membersthe ISP1504x1, ISP1508, ISP1702 and ISP1703all of which are fully compliant with industry specifications, including ULPI Rev. 1.1, USB On-The-Go (OTG) Rev. 1.2 and USB Rev. 2.0. Catering to the special needs of mobile phones, all transceivers support a mobile phone's wider range of input supply voltage of 3-4.5V. A new power-down mode conserves battery with an ultralow-power consumption of less than 0.5?A when the USB transceiver is not in use.

This initial range of second-generation ULPI transceivers have host, peripheral and OTG functions. ISP1508, ISP1702 and ISP1703 address lower system voltage levels with their VCC(I/O) of 1.4-1.95V, and some can be pin-selected to be in single data rate (SDR) or double data rate (DDR) interface operation. Additionally, all three parts can support USB charger detection, and external charge pump for OTG function.

Consortium effort
The ULPI transceiver interface, upon which NXP's second-generation ULPI Hi-Speed USB transceivers are based, was developed by an industry consortium to allow chips and systems designers to connect a Hi-Speed USB transceiver to USB core logic embedded in ASICs and SoCs. By using the ULPI standard interface instead of proprietary interfaces, ASIC and SoC designers can reduce design time, simplify testing and ensure interoperability with USB transceivers.

The ISP1504x1, ISP1508 and ISP1702 devices are sampling today, with the first two products in mass production in March and April, respectively.

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