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Date: 30-04-14

10MHz to 1.5GHz low jitter and power-efficient universal clocks

Exar has unveiled universal clocks series XR811xx with a wide range of output frequencies from 10MHz to 1.5GHz, with ultra-low phase noise jitter of less than 200fS. Exar says these clocks designed for communications, Audio/Video and industrial applications, the QFN-10 and TSSOP-8 packaged devices are footprint compatible with industry standard synthesizers, providing a superior performance second source option.

Exar explains its XR811xx synthesizers utilizes a highly flexible delta-sigma modulator and a very wide-ranging VCO in a PLL block that has been optimized to be extremely power efficient.

XR811xx consume 20mA of current and said to dissipate 60% less power compared to other similar devices in the market. The PLL can operate from either an input system clock or a crystal and incorporates both an integer divider and a high-resolution (

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