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参数资料
| 型号： | ICS843246AMLF |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 333.33 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| 封装： | 7.50 X 15.33 MM, 2.30 MM HEIGHT, ROHS COMPLIANT, MS-013, MO-119, SOIC-24 |
| 文件页数： | 16/17页 |
| 文件大小： | 2371K |
| 代理商： | ICS843246AMLF |
IDT / ICS 3.3V LVPECL FREQUENCY SYNTHESIZER
8
ICS843246AM REV A SEPTEMBER 21, 2006
ICS843246
FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER
PRELIMINARY
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS843246 provides
separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
CC, VCCA and
V
CCO 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
resistor along
with a 10
F and a .01F bypass capacitor should be connected
to each V
CCA pin. The 10 resistor can also be replaced by a
ferrite bead.
POWER SUPPLY FILTERING TECHNIQUES
FIGURE 1. POWER SUPPLY FILTERING
10
V
CCA
10
F
.01
F
3.3V
.01
F
V
CC
APPLICATION INFORMATION
CRYSTAL INPUT INTERFACE
The ICS843246 has been characterized with 18pF parallel
resonant crystals. The capacitor values shown in
Figure 2
Figure 2. CRYSTAL INPUt INTERFACE
below were deter mined using an 18pF parallel resonant
crystal and were chosen to minimize the ppm error.
C1
22p
X1
18pF Parallel Crystal
C2
22p
XTAL_OUT
XTAL_IN
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS843246AMLFT | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
| ICS843246AMT | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
| ICS843246BGI | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
| ICS843246BGILF | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
| ICS843246BGILFT | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
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