Synchronous Equipment Timing Source PLL
  • ACS8526
    • 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 ACS8525

Semtech ACS8525

Line Card Protection Switch for SONET/SDH Systems

The ACS8525 is a highly integrated, single-chip solution for “Hit-less” protection switching of SEC (SDH/SONET Equipment Clock) + Sync clock “Groups”, from Master and Slave SETS clock cards and a third (Stand-by) source, for Line Cards in a SONET or SDH Network Element.

Features


  • SONET/SDH applications up to OC-3/STM-1 bit rates
  • Switches between grouped inputs (SEC/Sync pairs)
  • Inputs: three SECs at any of 2, 4, 8 kHz (and N x 8 kHz multiples up to 155.52 MHz), plus Frame Sync/Multi-Frame Sync
  • Outputs: two SEC clocks at any of several spot frequencies from 2 kHz up to 77.76 MHz via the TTL/CMOS port and up to 311.04 MHz via the PECL/LVDS port
  • Selectable clock I/O port technologies
  • Modes for E3/DS3 and multiple E1/DS1 rate output clocks
  • Generates 8 kHz Frame Sync and 2 kHz Multi-Frame Sync output clocks with programmable pulse width and polarity
  • Frequency translation of SEC input clock to a different local line card clock
  • Robust input clock source activity monitoring on all inputs
  • Supports Free-run, Locked and Digital Holdover modes of operation
  • Automatic “Hit-less” source switchover on loss of input
  • External force fast switch between SEC1/SEC2 inputs
  • Phase Build-out for output clock phase continuity during input switchover
  • PLL “Locked” and “Acquisition” bandwidths individually selectable from 18, 35 or 70 Hz
  • Serial interface for device set-up
  • Single 3.3 V operation, 5 V I/O compatible
  • Operating temperature (ambient) of -40 to +85°C
  • Available in LQFP 64 package
  • Lead (Pb)-free version available (ACS8525T), RoHS and WEEE compliant

Applications


Packaging

LQFP64

Order Codes

  • ACS8525 : NCNR, 160 per tray, ok to order partial tray quantities
  • ACS8525T: Lead-free, RoHS and WEEE compliant, NCNR, 160 per tray, ok to order partial tray quantities