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ACS8514

更新时间: 2024-02-26 17:15:54
品牌 Logo 应用领域
商升特 - SEMTECH 监控
页数 文件大小 规格书
86页 1603K
描述
Synchronous Equipment Timing Source Partner IC for 2nd T4 DPLL, Accurate Monitoring & Input Extender

ACS8514 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:QFP
包装说明:LFQFP, QFP100,.63SQ,20针数:100
Reach Compliance Code:compliantHTS代码:8542.39.00.01
风险等级:5.41应用程序:SONET;SDH
JESD-30 代码:S-PQFP-G100JESD-609代码:e3
长度:14 mm湿度敏感等级:3
功能数量:1端子数量:100
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:LFQFP
封装等效代码:QFP100,.63SQ,20封装形状:SQUARE
封装形式:FLATPACK, LOW PROFILE, FINE PITCH峰值回流温度(摄氏度):260
电源:3.3,3.3/5 V认证状态:Not Qualified
座面最大高度:1.6 mm子类别:ATM/SONET/SDH ICs
最大压摆率:0.222 mA标称供电电压:3.3 V
表面贴装:YES电信集成电路类型:ATM/SONET/SDH SUPPORT CIRCUIT
温度等级:INDUSTRIAL端子面层:MATTE TIN
端子形式:GULL WING端子节距:0.5 mm
端子位置:QUAD处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:14 mmBase Number Matches:1

ACS8514 数据手册

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ACS8514 SETS Buddy  
Synchronous Equipment Timing Source Partner IC for  
2nd T4 DPLL, Accurate Monitoring & Input Extender  
ADVANCED COMMS & SENSING  
FINAL  
DATASHEET  
Description  
Features  
The ACS8514 is an optional partner integrated circuit for  
applications using the ACS8520/30. It adds an additional  
BITS clock (T4 path) DPLL to a clock synchronization  
system, for applications needing two T4 paths (e.g. to GR-253  
figure 5-21).  
¨ Partner to the ACS8520 & ACS8530 for use in SONET  
Minimum Clock (SMC) or SONET/SDH Equipment Clock  
(SEC) applications, to provide :  
¨ One Extra independent T4 path for those systems being  
designed to Figure 5-21 of Bellcore GR253[17]  
,
An alternative use for this DPLL is as an input extender  
such that the ACS8514 automatically selects one of 14  
clock sources, its output then feeds the ACS8530/20  
which can also select another 13 sources, giving a total  
input selection range of 27 sources. An additional 13  
sources can be added for each ACS8514 added.  
¨ An additional DPLL for accurate phase, average phase,  
frequency and average frequency measuring of any  
clock source.  
¨ Phase measurement accuracy to 0.7 degrees.  
¨ Frequency measurement accuracy to 3x10-10  
An additional highly accurate phase and frequency monitor  
is also available that can be used to carry out more  
detailed analysis of standby clock reference sources. This  
extra monitor is actually another DPLL which under  
software control could be set to sequentially analyze each  
input. It can check phase from 0.7º to 23000º and  
frequency from 0.0003ppm to 80 ppm. An approximate  
MTIE measurement could be calculated for each reference  
input as an extra quality check.  
¨ Aids in enhancing Phase Build-out performance to  
absorb phase disturbances when switching between  
noisy input sources, via s/w control.  
¨ Provides the facility to have long term frequency  
measuring and averaging for BOTH the main and any  
standby clock source so that the holdover frequency is  
always accurate for both main and standby clock  
selections.  
¨ Accepts 14 individual input reference clocks, all with  
Simultaneous activity and coarse frequency monitoring of  
all input sources is performed in the same way as on the  
ACS8520/30. These can be used to automatically qualify  
and select sources for the extra T4 path or for input  
selection for the ACS8520/30 when the ACS8514 is used  
as an input extender.  
robust input clock source quality monitoring.  
¨ Microprocessor interface - Intel, Motorola, Serial,  
Multiplexed, or boot from EPROM  
¨ IEEE 1149.1[5] JTAG Boundary Scan  
¨ Single 3.3 V operation. 5 V tolerant  
¨ Lead (Pb)-free version available (ACS8514T),  
Block Diagram  
RoHS and WEEE compliant  
Figure 1 Block Diagram of the ACS8514 SETS Buddy  
Revision 3.00 April 2007 © Semtech Corp.  
Page 1  
www.semtech.com  

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