同步设备定时源锁相环
  • ACS8509
  • 同步设备定时源用于SONET或SDH网络单元
  • ACS8510
  • 启2.1同步设备定时源用于SONET或SDH网络单元
  • ACS8514
  • 同步设备定时源伙伴IC第二T4 DPLL,准确监测输入扩展器
  • ACS8515
  • 启2.1线卡保护开关用于SONET或SDH网络元素
  • ACS8520A
  • 集Lite同步设备定时源为3/ 4E/4和SMC系统
  • ACS8522
  • 集Lite同步设备定时源为3/ 4E/4和SMC系统
  • ACS8522A
  • 集Lite同步设备定时源为3/ 4E/4和SMC系统
  • ACS8522BT
  • 同步设备定时源为3/ 4E/4,SMC和以太网系统
Semtech ACS8520

Semtech ACS8520

同步设备定时源(套)为3/ 4E/4和SMC系统

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Not Recommended for New Designs. Please contact your local Semtech sales representative.

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
  • ACS8520T: Lead-free, RoHS and WEEE compliant, NCNR
 
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