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MK2049-45SI PDF预览

MK2049-45SI

更新时间: 2024-01-30 15:05:42
品牌 Logo 应用领域
矽成 - ICSI 晶体外围集成电路光电二极管通信时钟
页数 文件大小 规格书
9页 184K
描述
3.3V Communications Clock PLL

MK2049-45SI 技术参数

是否无铅:含铅是否Rohs认证:不符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:SOIC-20针数:20
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.83
Is Samacsys:NJESD-30 代码:R-PDSO-G20
JESD-609代码:e0长度:12.8 mm
湿度敏感等级:1端子数量:20
最高工作温度:85 °C最低工作温度:-40 °C
最大输出时钟频率:125 MHz封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP20,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):225电源:3.3 V
主时钟/晶体标称频率:25.6 MHz认证状态:Not Qualified
座面最大高度:2.65 mm子类别:Clock Generators
最大供电电压:3.45 V最小供电电压:3.15 V
标称供电电压:3.3 V表面贴装:YES
技术:CMOS温度等级:INDUSTRIAL
端子面层:Tin/Lead (Sn85Pb15)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:7.5 mm
uPs/uCs/外围集成电路类型:CLOCK GENERATOR, OTHERBase Number Matches:1

MK2049-45SI 数据手册

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MK2049-45  
3.3V Communications Clock PLL  
Description  
Features  
The MK2049-45 is a dual Phase-Locked Loop (PLL)  
device which can provide frequency synthesis and jitter  
attenuation. The first PLL is VCXO based and uses a  
pullable crystal to track signal wander and attenuate  
input jitter. The second PLL is a translator for frequency  
multiplication. Basic configuration is determined by a  
Mode/Frequency Selection Table. Loop bandwidth and  
damping factor are programmable via external loop  
filter component selection.  
Packaged in 20 pin SOIC  
3.3 V + 5% operation  
Meets the TR62411, ETS300 011, and GR-1244  
specification for MTIE, Pull-in/Hold-in Range, Phase  
Transients, and Jitter Generation for Stratum 3, 4,  
and 4E  
Accepts multiple inputs: 8 kHz backplane clock, or 10  
to 50 MHz  
Locks to 8 kHz + 100 ppm (External mode)  
Buffer Mode allows jitter attenuation of 10 - 50 MHz  
Buffer Mode accepts a 10 to 50MHz input and will  
provide a jitter attenuated output at 0.5 x ICLK, 1 x  
ICLK or 2 x ICLK. In this mode the MK2049-45 is ideal  
for filtering jitter from high frequency clocks.  
input and x1 / x0.5 or x1 / x2 outputs  
Exact internal ratios enable zero ppm error  
Output rates include T1, E1, T3, E3, and OC3  
submultiples  
In External Mode, ICLK accepts an 8 kHz clock and will  
produce output frequencies from a table of common  
communciations clock rates, CLK and CLK/2. This  
allows for the generation of clocks frequency-locked to  
an 8 kHz backplane clock, simplifying clock  
Available in Pb (lead) free package  
See also the MK2049-34 and MK2049-36  
synchronization in communications systems.  
The MK2049-45 can be dynamically switched between  
T1, E1, T3, E3 outputs with the same 24.576 MHz  
crystal.  
ICS can customize these devices for many other  
different frequencies. Contact your ICS representative  
for more details.  
Block Diagram  
CS  
CL  
CL Optional Crystal Load Caps  
RSET  
CP  
RS  
External Pullable Crystal  
ISET  
CAP2  
CAP1 X1  
X2  
Phase  
Detector  
Reference  
Divider  
Reference  
Divider  
Output  
Divider  
ICLK  
VCXO  
VCO  
CLK  
(used in buffer  
mode only)  
Charge  
Pump  
Divide  
by 2  
CLK/2  
Feedback  
Divider  
Feedback  
Divider (N)  
Translator  
PLL  
VCXO  
PLL  
8k  
4
Divider Value  
Look-up Table  
FS3:0  
MDS 2049-45 G  
1
Revision 101904  
Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com  

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