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参数资料
| 型号： | ICS84025EMLF |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 125 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| 封装： | 7.50 X 15.33 MM, 2.30 MM HEIGHT, SOIC-24 |
| 文件页数： | 10/12页 |
| 文件大小： | 1450K |
| 代理商： | ICS84025EMLF |
84025EM
www.icst.com/products/hiperclocks.html
REV. A APRIL 16, 2003
7
Integrated
Circuit
Systems, Inc.
ICS84025
CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER WITH FANOUT BUFFER
PRELIMINARY
APPLICATION INFORMATION
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS84025 provides sepa-
rate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
DD, VDDA, and VDDO
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 2 illustrates how
a 24
resistor along with a 10F and a .01F bypass
capacitor should be connected to each V
DDA pin.
FIGURE 2. POWER SUPPLY FILTERING
24
V
DDA
10
F
.01
F
3.3V
.01
F
V
DD
Figure 3. CRYSTAL INPUt INTERFACE
CRYSTAL INPUT INTERFACE
A crystal can be characterized for either series or parallel
mode operation. The ICS84025 has a built-in crystal oscillator
circuit. This interface can accept either a series or parallel
crystal without additional components and generate
POWER SUPPLY FILTERING TECHNIQUES
frequencies with accuracy suitable for most applications.
Additional accuracy can be achieved by adding two small
capacitors C1 and C2 as shown in
Figure 3.
C2
22pF
C1
18pF
25MHz
X1
ICS84025
20
21
XTAL2
XTAL1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS84025EMT | 制造商:ICS 制造商全称:ICS 功能描述:CRYSTAL-TO-LVCMOS / LVTTL FREQUENCY SYNTHESIZER WITH FANOUT BUFFER |
| ICS840271BGILF | 功能描述:IC TRANSLATOR ETHER SYNC 8TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™ 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 |
| ICS840271BGILFT | 功能描述:IC TRANSLATOR ETHER SYNC 8TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™ 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 |
| ICS840271I | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:SYNCHRONOUS ETHERNET FREQUENCY TRANSLATOR |
| ICS840272I | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:Synchronous Ethernet Frequency Translator |
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