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.
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
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may be requested.
Purchase
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Order Evaluation Boards
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