Description
The ZL30406 is an analog phase-locked loop (APLL) designed to provide rate conversion and jitter attenuation for SDH (Synchronous Digital Hierarchy) and SONET (Synchronous Optical Network) networking equipment. The ZL30406 generates very low jitter clocks that meet the jitter requirements of Telcordia GR-253-CORE OC-48, OC-12, OC-3, OC-1 rates and ITU-T G.813 STM-16, STM-4 and STM-1 rates.

FEATUREs
• Meets jitter requirements of Telcordia GR-253-CORE for OC-48, OC-12, and OC-3 rates
• Meets jitter requirements of ITU-T G.813 for STM-16, STM-4 and STM-1 rates
• Provides four LVPECL differential output clocks at 77.76 MHz
• Provides a CML differential clock programmable
to 19.44 MHz, 38.88 MHz, 77.76 MHz and 155.52 MHz • Provides a single-ended CMOS clock at 19.44 MHz
• Provides enable/disable control of output clocks
• Accepts a CMOS reference at 19.44 MHz
• 3.3 V supply

APPLICATIONs
• SONET/SDH line cards
• Network Element timing cards