ACS8520A: SETS Lite Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems
The ACS8520A 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.
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- Suitable for Stratum 3, 4E, 4 and SONET Minimum Clock (SMC) or SONET/SDH Equipment Clock (SEC) applications
- Meets Telcordia 1244-CORE[19] Stratum 3 and GR-253[17], and ITU-T G.813[11] Options Ι and ΙΙ specifications
- 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
- Microprocessor interface - Intel, Motorola, Serial, Multiplexed, or 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
- Available in LQFP 100 package
- Lead (Pb) - free version available (ACS8520AT), RoHS and WEEE compliant.
- ACS8520 A: NCNR, 90 per tray, ok to order partial tray quantities
- ACS8520AT: Lead-free, RoHS and WEEE compliant, NCNR, 90 per tray, ok to order partial tray quantities
