zl30142 Zarlink Semiconductor, zl30142 Datasheet - Page 2

• Manufacturer Part Number: zl30142
• Description: Synce Sonet/sdh G.8262/stratum 3 System Synchronizer
• Manufacturer: Zarlink Semiconductor

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The ZL30142 SONET/SDH/GbE Stratum 3 System Synchronizer and SETS device is a highly integrated device
that provides all of the functionality that is required for a central timing card in carrier grade network equipment. The
basic functions of a central timing card include:
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In a typical application, the main timing path uses the DPLL to synchronize to either an external BITS source or to a
recovered line timed source. The DPLL monitors the references and automatically selects the best available
reference based on configurable priority and revertive properties. the DPLL provides the wander filtering function
and the P0 synthesizer generates a jitter filtered clock and frame pulse for the system timing bus which supplies all
line cards with a common timing reference.
Input reference monitoring for both frequency accuracy and phase irregularities
Automatic input reference selection
Support of both external timing and line timing modes
Hitless reference switching
Wander and jitter filtering
Master/slave crossover for minimizing phase alignment between redundant timing cards
Independent derived output timing path for support of the SETS functionality
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Figure 2 - Typical Application of the ZL30142
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ZL30142
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Short Form Data Sheet
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