ZL30121 SONET/SDH Low Jitter System Synchronizer Data Sheet Features • Supports the requirements of Telcordia GR-253 and GR-1244 for Stratum 3, 4E, 4 and SMC clocks, and the requirements of ITU-T G.
781 SETS, G.
813 SEC, G.
823, G.
824 and G.
825 clocks • Internal APLL provides standard output clock frequencies up to 622.
08 MHz with jitter 3 ps RMS suitable for GR-253-CORE OC-12 and G.
813 STM-16 interfaces • Programmable output synthesizers generate clock frequencies from any multiple of 8 kHz up to 77.
76 MHz in addition to 2 kHz • Provides two DPLLs which are independently configurable through a serial software interface • DPLL1 provides all the features necessary for generating SONET/SDH com...

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