AD9549ABCPZ-REEL7
数据手册.pdfADI(亚德诺)
电子元器件分类
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**
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- Network synchronization
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- Reference clock jitter cleanup
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- SONET/SDH clocks up to OC-192, including FEC
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- Stratum 3/3E reference clocks
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- Wireless base stations, controllers
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- Cable infrastructure
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- Data communications
### Features and Benefits
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- Flexible reference inputs
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- Input frequencies: 8 kHz to 750 MHz
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- Two reference inputs
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- Loss of reference indicators
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- Auto and manual holdover modes
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- Auto and manual switchover modes
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- Smooth A-to-B phase transition on outputs
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- Excellent stability in holdover mode
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- Programmable 16 + 1-bit input divider, R
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- Differential HSTL clock output
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- Output frequencies to 750 MHz
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- Low jitter clock doubler for frequencies >
400 MHz
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- Please see Data Sheet for additional features.