Analog Devices Inc.

The AD9548 provides synchronization for many systems, including synchronous optical networks (SONET/SDH). The AD9548 generates an output clock synchronized to one of up to four differential or eight single-ended external input references. The digital PLL allows for reduction of input time jitter or phase noise associated with the external references. The AD9548 continuously generates a clean (low jitter), valid output clockeven when all references have failed by means of a digitallycontrolled loop and holdover circuitry.The AD9548 operates over an industrial temperature range of?40?C to +85?C.ApplicationsNetwork synchronizationCleanup of reference clock jitterGPS 1 pulse per second synchronizationSONET/SDH clocks up to OC-192, including FECStratum 2 holdover, jitter cleanup, and phase transient controlStratum 3E and Stratum 3 reference clocksWireless base stations, controllersCable infrastructureData communications

* $380.59 - * $381.48