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| 型号： | ICS841S02BGILF |
| 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, PDSO20 |
| 封装： | 6.50 X 4.40 MM, 0.92 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-20 |
| 文件页数： | 3/17页 |
| 文件大小： | 542K |
| 代理商： | ICS841S02BGILF |
IDT / ICS PCI EXPRESS CLOCK GENERATOR
11
ICS841S02BGI REV. C NOVEMBER 1, 2007
ICS841S02I
PCI EXPRESS CLOCK GENERATOR
PRELIMINARY
APPLICATION INFORMATION
POWER SUPPLY FILTERING TECHNIQUES
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. To achieve optimum jitter
performance, power supply isolation is required. The ICS841S02I
provides separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
DD_SRC, VDDA and VDD_REF
should be individually connected to the power supply
plane through vias, and 0.01F bypass capacitors should be used
for each pin. Figure 1 illustrates this for a generic V
DD_SRC pin and
also shows that V
DDA requires that an additional10Ω resistor
along with a 10F bypass capacitor be connected to the V
DDA pin.
FIGURE 1. POWER SUPPLY FILTERING
10
Ω
V
DDA
10
μF
.01
μF
3.3V
.01
μF
V
DD
USING THE ON-BOARD CRYSTAL OSCILLATOR
The ICS841S02I features a fully integrated Pierce oscillator to
minimize system implementation costs. The recommended
operation of the ICS841S02I is with a 25MHz, 18pF parallel
resonant crystal. See Table 7 for complete crystal specifications.
For proper operation, a minimum of 10pF capacitance on each
crystal pin is required. The capacitor values shown in Figure 2
TABLE 7. RECOMMENDED CRYSTAL SPECIFICATIONS
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FIGURE 2. CRYSTAL OSCILLATOR WITH TRIM CAPACITOR
XT AL_IN
XTAL_OUT
25MHz
TBD
33pF
18pF
are typical values for the recommended crystal as show in
Table 7. The specific values may be adjusted to trim the frequency
for the individual board layouts if desired.
The crystal and optional trim capacitors should be located as
close to the ICS841S02I XTAL_IN and XTAL_OUT pins as
possible to minimize board level parasitics.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS841S02BGILFT | 功能描述:IC CLOCK GENERATOR PCI 20-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 |
| ICS841S02BGIT | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:PCI EXPRESS⑩ CLOCK GENERATOR |
| ICS841S02I | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:PCI EXPRESS⑩ CLOCK GENERATOR |
| 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 |
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