參數(shù)資料
型號: ICS843004AGI-04LFT
元件分類: 時鐘產(chǎn)生/分配
英文描述: 680 MHz, OTHER CLOCK GENERATOR, PDSO24
封裝: 4.40 X 7.80 MM, 0.92 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-24
文件頁數(shù): 11/14頁
文件大小: 184K
代理商: ICS843004AGI-04LFT
843004AGI-04
www.icst.com/products/hiperclocks.html
REV. A FEBRUARY 15, 2006
6
Integrated
Circuit
Systems, Inc.
ICS843004I-04
FEMTOCLOCKS CRYSTAL/LVCMOS-TO-
3.3V LVPECL FREQUENCY SYNTHESIZER
CRYSTAL INPUT INTERFACE
The ICS843004I-04 has been characterized with 18pF
parallel resonant crystals. The capacitor values shown in
Figure 2 below were determined using a 19.44MHz,
18pF parallel resonant crystal and were chosen to mini-
mize the ppm error.
APPLICATION INFORMATION
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS843004I-04 pro-
vides separate power supplies to isolate any high switch-
ing noise from the outputs to the internal PLL. V
CC, VCCA, and
V
DDO 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
Ω resistor along with a 10F and a .01μF bypass
capacitor should be connected to each V
CCA.
POWER SUPPLY FILTERING TECHNIQUES
FIGURE 1. POWER SUPPLY FILTERING
10
Ω
V
CCA
10
μF
.01
μF
3.3V
.01
μF
V
CC
Figure 2. CRYSTAL INPUt INTERFACE
C1
22p
X1
18pF Parallel Crystal
C2
22p
XTAL_OUT
XTAL_IN
相關(guān)PDF資料
PDF描述
ICS843004AGI 226.66 MHz, OTHER CLOCK GENERATOR, PDSO24
ICS843004AGILF 226.66 MHz, OTHER CLOCK GENERATOR, PDSO24
ICS843011AGLF 113.33 MHz, OTHER CLOCK GENERATOR, PDSO8
ICS843011AM-01LF 113.33 MHz, OTHER CLOCK GENERATOR, PDSO8
ICS843011AM-01 113.33 MHz, OTHER CLOCK GENERATOR, PDSO8
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