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双输入网络时钟发生器/同步器ad9549数据表

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  • 标      签: ad9549 时钟发生器

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The AD9549 provides synchronizaTIon for many systems, including synchronous opTIcal networks (SONET/SDH)。 The AD9549 generates an output clock, synchronized to one of two external input references. The external references may contain significant TIme jitter, also specified as phase noise. Using a digitally controlled loop and holdover circuitry, the AD9549 conTInues to generate a clean (low jitter), valid output clock during a loss of reference condition, even when both references have failed. The AD9549 operates over an industrial temperature range of −40°C to +85°C.
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