双输入网络时钟发生器/同步器 Dual Input Network Clock Generator/Synchronizer
Product Details
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.
**Applications**
### Features and Benefits
400 MHz
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