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参数资料
| 型号： | ICS843021AGT |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 140 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封装： | 4.40 X 3 MM, 0.925 MM HEIGHT, MO-153, TSSOP-8 |
| 文件页数： | 10/13页 |
| 文件大小： | 186K |
| 代理商： | ICS843021AGT |
843021AG
www.icst.com/products/hiperclocks.html
REV. C MARCH 31, 2005
6
Integrated
Circuit
Systems, Inc.
ICS843021
FEMTOCLOCKSCRYSTAL-TO-
3.3V LVPECL CLOCK GENERATOR
APPLICATION INFORMATION
Figure 2. CRYSTAL INPUt INTERFACE
CRYSTAL INPUT INTERFACE
The ICS843021 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 2 below were determined using a 25MHz, 18pF parallel
resonant crystal and were chosen to minimize the ppm error.
The optimum C1 and C2 values can be slightly adjusted for
different board layouts.
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise.The ICS843021 provides sepa-
rate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
CC, and VCCA should
be
individually
connected
to
the
power
supply
plane through vias, and bypass capacitors should be
used for each pin. To achieve optimum jitter performance,
power supply isolation is required.
Figure 1 illustrates how
a 10
Ω resistor along with a 10μF and a .01μF bypass
capacitor should be connected to each V
CCA pin.
POWER SUPPLY FILTERING TECHNIQUES
FIGURE 1. POWER SUPPLY FILTERING
10
Ω
V
CCA
10
μF
.01
μF
3.3V
.01
μF
V
CC
C1
33p
X1
18pF Parallel Crystal
C2
27p
XTAL_OUT
XTAL_IN
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| ICS843023AGLFT | 320 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS843023AGLF | 320 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS843031AG-01LFT | 340 MHz, OTHER CLOCK GENERATOR, PDSO8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS843021I-01 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V, 2.5V 125MHZ LVPECL CLOCK GENERATOR |
| ICS843022 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR |
| ICS843022AG | 制造商:INT_DEV_TECH 功能描述: |
| ICS843022AGI-48LF | 功能描述:IC CLK SYNTHESIZER LVPECL 8TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™, FemtoClock™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS843022AGI-48LFT | 功能描述:IC CLK SYNTHESIZER LVPECL 8TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™, FemtoClock™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
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