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| 型號(hào)： | 843004AG-01LF |
| 廠(chǎng)商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類(lèi)： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 170 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(yè)數(shù)： | 16/17頁(yè) |
| 文件大?。?/td> | 683K |
| 代理商： | 843004AG-01LF |
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IDT / ICS 3.3V LVPECL FREQUENCY SYNTHESIZER
8
ICS843004-01 REV B JUNE 30, 2006
ICS843004-01
FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
CRYSTAL INPUT INTERFACE
The ICS843004-01 has been characterized with 18pF parallel
resonant crystals. The capacitor values shown in
Figure 2 below
Figure 2. CRYSTAL INPUt INTERFACE
were determined using a 25MHz, 18pF parallel resonant crystal
and were chosen to minimize the ppm error.
APPLICATION INFORMATION
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS843004-01 provides
separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
CC, VCCA, and VCCO
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
CCA.
POWER SUPPLY FILTERING TECHNIQUES
FIGURE 1. POWER SUPPLY FILTERING
10
V
CCA
10
F
.01
F
3.3V
.01
F
V
CC
C1
33p
X1
18pF Parallel Crystal
C2
27p
XTAL_OUT
XTAL_IN
INPUTS:
CRYSTAL INPUT:
For applications not requiring the use of the crystal oscillator input,
both XTAL_IN and XTAL_OUT can be left floating. Though not
required, but for additional protection, a 1kW resistor can be tied
from XTAL_IN to ground.
TEST_CLK INPUT:
For applications not requiring the use of the test clock, it can be
left floating. Though not required, but for additional protection, a
1k
resistor can be tied from the TEST_CLK to ground.
LVCMOS CONTROL PINS:
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional
protection. A 1k
resistor can be used.
RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS
OUTPUTS:
LVPECL OUTPUT
All unused LVPECL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential output
pair should either be left floating or terminated.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 843004AG-01LFT | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| 843004AG-01T | 制造商:Integrated Device Technology Inc 功能描述:PLL FREQ SYNTHESIZER SGL 24TSSOP - Tape and Reel |
| 843004AG-02 | 制造商:Integrated Device Technology Inc 功能描述:PLL FREQ SYNTHESIZER SGL 24TSSOP - Rail/Tube |
| 843004AG-02LF | 制造商:Integrated Device Technology Inc 功能描述:PLL Frequency Synthesizer Single 24-Pin TSSOP Tube 制造商:IDT from Components Direct 功能描述:IDT 843004AG-02LF PLL - Rail/Tube 制造商:IDT 功能描述:IDT 843004AG-02LF PLL |
| 843004AG-02LFT | 制造商:Integrated Device Technology Inc 功能描述:PLL Frequency Synthesizer Single 24-Pin TSSOP T/R 制造商:Integrated Device Technology Inc 功能描述:PLL FREQ SYNTHESIZER SGL 24TSSOP - Tape and Reel |
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