Synchronous Equipment Timing Source PLL
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    • LC/P Lite Line Card Protection Switch for PDH, SONET, or SDH Systems
  • ACS8527
    • MUXPLL Line Card Protection Switch for PDH, SONET, or SDH Systems
  • ACS8530
    • Synchronous Equipment Timing Source for Stratum 2/3E/3 Systems
  • ACS8595
    • ATCA Line Card Protection Switch for SONET/SDH AdvancedTCA Systems
  • SC561
    • Dual Output Low Noise LDO Linear Regulator
  • SC810
    • Single Input/Single Mode Single-cell Li-ion Battery Charger
  • SCDAS4F
    • Standard Recovery, High Current Center Tap and Doubler Rectifier Assemblies
Semtech ACS8520

Semtech ACS8520

Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems

The ACS8520 is a highly integrated, single-chip solution for the Synchronous Equipment Timing Source (SETS) function in a SONET or SDH Network Element. The device generates SONET or SDH Equipment Clocks (SEC) and Frame Synchronization clocks.

Features


  • Highly integrated single-chip solution for the synchronous equipment timing source (SETS) function in a SONET or SDH network
  • Suitable for Stratum 3, 4E, and 4, and SONET minimum clock (SMC) or SONET/SDH equipment clock (SEC) applications
  • Meets specifications
    • Telcordia (Bellcore) 1244-CORE
    • Stratum 3
    • GR-253
    • ITU-T G.813 Options I and II
  • Accepts 14 individual input reference clocks, all with robust input clock source quality monitoring
  • Simultaneously generates nine output clocks, plus two sync-pulse outputs
  • Absolute holdover accuracy better than 3 x 10-10 (manual), 7.5 x 10-14 (instantaneous); holdover stability defined by choice of external XO
  • Programmable PLL bandwidth, for wander and jitter tracking/attenuation, 0.1 Hz to 70 Hz in 10 steps
  • Automatic hit-less source switchover on loss of input
  • Phase transient protection and phase build-out on locked-to reference and on reference switching
  • Microprocessor interface
    • Intel
    • Motorola
    • Serial
    • Multiplexed
    • Boot from EPROM
  • Output phase adjustment in 6 ps steps up to ± 200 ns
  • IEEE 1149.1 JTAG boundary scan
  • Single 3.3 V operation; 5 V tolerant
  • LQFP-100 package
  • Lead (Pb) - free version available (ACS8520T), RoHS and WEEE compliant.

Applications


Packaging

LQFP100

Order Codes

  • ACS8520 : NCNR, 90 per tray, ok to order partial tray quantities
  • ACS8520T: Lead-free, RoHS and WEEE compliant, NCNR, 90 per tray, ok to order partial tray quantities