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参数资料
| 型号： | ICS840031AMILFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 106.67 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封装： | 3.90 X 4.90 MM, 1.37 MM HEIGHT, LEAD FREE, MS-012, SOIC-8 |
| 文件页数： | 7/10页 |
| 文件大小： | 354K |
| 代理商： | ICS840031AMILFT |
840031AMI
www.icst.com/products/hiperclocks.html
REV. A FEBRUARY 24, 2005
6
Integrated
Circuit
Systems, Inc.
ICS840031I
FEMTOCLOCKSCRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
APPLICATION INFORMATION
Figure 2. CRYSTAL INPUt INTERFACE
CRYSTAL INPUT INTERFACE
The ICS840031I has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 2 below were determined using a 24.576MHz, 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.
POWER SUPPLY FILTERING TECHNIQUES
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS840031I provides
separate 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 1 illustrates how
a 10
resistor along with a 10F and a .01F bypass
capacitor should be connected to each V
DDA pin.
FIGURE 1. POWER SUPPLY FILTERING
10
V
DDA
10
F
.01
F
3.3V
.01
F
V
DD
C1
33p
X1
18pF Parallel Crystal
C2
22p
XTAL_OUT
XTAL_IN
ICS840031I
FEMTOCLOCKS CRYSTAL-TO-LVCMOS/LVTTL CLOCK GENERATOR
TSD
IDT / ICS FEMTOCLOCKS CRYSTAL-TO-LVCMOS/LVTTL CLOCK GENERATOR
ICS840031I
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS840031AMIT | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840031I | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840051 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCK CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR |
| ICS840051AG | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCK CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR |
| ICS840051AGI | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
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