Timing over Packet Networks (ToPSync)
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  • ToPSync® Timing-over-packet synchronization technology
Semtech ACS9522T

Semtech ACS9522T

ToPSync® Timing-over-packet synchronization technology

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PTP timing features

  • PTP Grandmaster selection - automatic or manual PTP master/slave mode selection.
  • Powerful network delay analysis - full time-alignment in the slave over hostile networks (Layer 2 or layer 3 networks).
  • Dynamic adaptation - to network delay variations. Network loading change tolerant (e.g., ramps and steps).
  • Time alignment - better than ±1 μs on a managed 10-switch GbE network under G.826120 test conditions.*
  • Frequency alignment - better than ±10 ppb on a managed 10-switch GbE network under G.826120 test conditions.*

TDM timing features

  • Programmable TDM timing 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.
  • Output clock phase adjustment - in 6 ps steps to ±200 ns.


  • Stratum 3, 3E, 4E, 4, SONET Minimum Clock (SMC) or SONET/SDH Equipment Clock (SEC) or Ethernet, IEEE 1588™ (2008)  PTP, Synchronous Ethernet, Ethernet Equipment Clock


  • LBGA package: 324 pin, 19 mm x 19 mm

Order Codes

  • ACS9522IFALBGT - Lead (Pb)-free, RoHS and WEEE compliant
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