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