Synchronization and Timing Solutions

 

 

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SCS3020

The SCS3020 is an integrated chip solution for timing card synchronization and clock generation in SONET/ SDH network edge elements. The device is fully compliant with Telcordia GR-1244-CORE, GR-253-Core stratum 4, 4E and SMC requirements, ITU-T G.812 for Type IV, V, and VI and G.813 for SEC requirements. All phase lock and output signal generation is digital for accurate and consistent performance.

The SCS3020 device accepts two reference inputs and generates three synchronous clocks. All output signals are directly digitally synthesized, requiring no external or internal VCO or analog PLLs. Device control includes bus interface for register access.

Supports freerun, locked, and holdover modes
Accepts 2 reference inputs at 8Khz, 1.544Mhz, 2.048Mhz, and 19.44Mhz
Input reference frequencies are automatically detected
Supports hardwire pins to select active reference.
Three output signals: 8Khz framing, 19.44Mhz, and one user selectable at 1,2,4 or 8 x 2.048Mhz or 1,2,4 or 8 x 1.544Mhz
Individual output enable/disable
User controllable automatic phase align capability
Frequency ramp control during reference switching
Hit-less reference switching (<5nS, <2nS typical)
10-6 ppm holdover accuracy
Configurable bandwidth filter from .098Hz to 1.6Hz
Supports SPI interface
Single 3.3V supply

SCS3020 Product Brief                    SCS3020 Product Data Sheet   

 

 

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