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Transceiver eases the task of passing USB compliance testing

Posted: 01 Sep 2005     Print Version  Bookmark and Share

Keywords:mic2551a-2.5  transceiver  micrel  usb transceiver 

The new single-chip transceiver from Micrel complies with the physical layer specifications of the USB 2.0. The MIC2551A USB transceiver supports both full-speed (12Mbps) and low-speed (1.5Mbps) operation, and introduces superior edge rate control, producing crisper eye diagrams. This, in turn, eases the task of passing USB compliance testing.

According to Micrel, a unique, patented, dual supply voltage operation allows the MIC2551A to reference the system I/F I/O signals to a supply voltage down to 1.6V while independently powered by the USB VBUS. This reduces system operating current and allows the system to operate at its core voltage without additional buffering logic, added the company.

The MIC2551A-2.5 is differentiated from the MIC2551A by a smaller space saving MLF package (2.5-by-2.5mm) and ±15kV ESD protection, which eliminates the need for separate ESD protection devices on the D+, D- data lines.

Additional features of this new product include speed select termination supply, low power consumption to meet USB suspend current requirements, and software-controlled enumeration. The USB transceiver also doe not require power supply sequencing.

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