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8430AYI-71 PDF预览

8430AYI-71

更新时间: 2024-01-21 05:24:30
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
16页 211K
描述
Clock Generator, PQFP32

8430AYI-71 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete包装说明:QFP, QFP32,.35SQ,32
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.33
JESD-30 代码:S-PQFP-G32JESD-609代码:e3
湿度敏感等级:3端子数量:32
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:QFP
封装等效代码:QFP32,.35SQ,32封装形状:SQUARE
封装形式:FLATPACK峰值回流温度(摄氏度):260
电源:3.3 V认证状态:Not Qualified
子类别:Clock Generators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:Matte Tin (Sn) - annealed
端子形式:GULL WING端子节距:0.8 mm
端子位置:QUAD处于峰值回流温度下的最长时间:30
Base Number Matches:1

8430AYI-71 数据手册

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ICS8430I-71  
Integrated  
Circuit  
Systems, Inc.  
700MH  
Z, LOW  
J
ITTER, CRYSTAL  
I
NTERFACE  
/
LVCMOS-TO-3.3V LVPECL FREQUENCY  
SYNTHESIZER  
APPLICATION INFORMATION  
TERMINATION FOR LVPECL OUTPUTS  
The clock layout topology shown below is a typical termina-  
tion for LVPECL outputs.The two different layouts mentioned  
are recommended only as guidelines.  
drive 50transmission lines. Matched impedance techniques  
should be used to maximize operating frequency and mini-  
mize signal distortion. There are a few simple termination  
schemes. Figures 2A and 2B show two different layouts which  
are recommended only as guidelines. Other suitable clock lay-  
outs may exist and it would be recommended that the board  
designers simulate to guarantee compatibility across all printed  
circuit and clock component process variations.  
FOUT and nFOUT are low impedance follower outputs that  
generate ECL/LVPECL compatible outputs.Therefore, termi-  
nating resistors (DC current path to ground) or current sources  
must be used for functionality.These outputs are designed to  
3.3V  
Zo = 50Ω  
125Ω  
125Ω  
FOUT  
FIN  
Z
o = 50Ω  
Zo = 50Ω  
FOUT  
FIN  
50Ω  
50Ω  
VCC - 2V  
Zo = 50Ω  
1
RTT =  
Zo  
RTT  
((VOH + VOL) / (VCC – 2)) – 2  
84Ω  
84Ω  
FIGURE 2A. LVPECL OUTPUT TERMINATION  
FIGURE 2B. LVPECL OUTPUT TERMINATION  
CRYSTAL INPUT INTERFACE  
The ICS8430I-71 has been characterized with 18pF parallel error. These same capacitor values will tune any 18pF paral-  
lel resonant crystal over the frequency range and other pa-  
rameters specified in this data sheet.The optimum C1 and C2  
resonant crystals. The capacitor values, C1 and C2, shown  
in Figure 3 below were determined using a 25MHz, 18pF par-  
allel resonant crystal and were chosen to minimize the ppm values can be slightly adjusted for different board layouts.  
XTAL2  
C1  
18p  
X1  
18pF Parallel Crystal  
XTAL1  
C2  
22p  
Figure 3. CRYSTAL INPUt INTERFACE  
8430AYI-71  
www.icst.com/products/hiperclocks.html  
REV. B JANUARY 27, 2005  
8

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