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参数资料
| 型号： | ICS841S04BGI |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 100 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO24 |
| 封装： | 4.40 X 7.80 MM, 0.92 MM HEIGHT, MO-153, TSSOP-24 |
| 文件页数： | 2/16页 |
| 文件大小： | 278K |
| 代理商： | ICS841S04BGI |
IDT / ICS PCI EXPRESS CLOCK GENERATOR
10
ICS841S04BGI REV. C MAY 23, 2007
ICS841S04I
PCI EXPRESS CLOCK GENERATOR
PRELIMINARY
APPLICATION INFORMATION
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS841S04I provides sepa-
rate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
DD_REF, VDD_SRC, and
V
DDA 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 iso-
lation is required. Figure 1 illustrates how a 10
Ω resistor along
with a 10F and a .01
μF bypass capacitor should be connected
to each V
DDA. The 10Ω resistor can also be replaced by a ferrite
bead.
POWER SUPPLY FILTERING TECHNIQUES
FIGURE 1. POWER SUPPLY FILTERING
10
Ω
V
DDA
10
μF
.01
μF
3.3V
.01
μF
V
DD_REF
USING THE ON-BOARD CRYSTAL OSCILLATOR
The ICS841S04I features a fully integrated Pierce oscillator to
minimize system implementation costs. The ICS841S04I may be
operated with a 25MHz crystal and without additional components.
Recommended operation for the crystal should be of a parallel
resonant type and a load specification of C
L = 18pF. See Table 7
for complete crystal specifications.
If more precise frequency control is desired, the addition of
capacitors from each of the XTAL_IN and XTAL_OUT pins to
ground may be used to trim the frequency as shown in Figure 2.
TABLE 7. RECOMMENDED CRYSTAL SPECIFICATIONS
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FIGURE 2. CRYSTAL OSCILLATOR WITH TRIM CAPACITOR
The crystal and optional trim capacitors should be located as
close to the ICS841S04I XTAL_IN and XTAL_OUT pins as possible
to avoid any board level parasitic.
XT AL_IN
XTAL_OUT
25MHz
TBD
33pF
18pF
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS841S04BGILF | 功能描述:IC CLK GENERATOR PLL 24-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS841S04BGILFT | 功能描述:IC CLOCK GENERATOR PCI 24-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS841S101EGILF | 制造商:Integrated Device Technology Inc 功能描述:IC CLK GENERATOR PLL 16-TSSOP |
| ICS841S101EGILFT | 制造商:Integrated Device Technology Inc 功能描述:IC CLK GENERATOR PLL 16-TSSOP |
| ICS841S102EGILF | 制造商:Integrated Device Technology Inc 功能描述:IC CLK GENERATOR PLL 20-TSSOP |
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