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參數(shù)資料
| 型號： | 840004AGI-01T |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 175 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| 封裝： | 6.5 X 4.4 MM, 0.925 MM HEIGHT, MO-153, TSSOP-20 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 2902K |
| 代理商： | 840004AGI-01T |
ICS840004I-01
FEMTOCLOCKS CRYSTAL-TO-LVCMOS/LVTTL CLOCK SYNTHESIZER
IDT / ICS LVCMOS/LVTTL FREQUENCY SYNTHESIZER
12
ICS840004AGI-01 REV. B OCTOBER 31, 2008
Application Information
Recommendations for Unused Input and Output Pins
Inputs:
Crystal Inputs
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 1k
resistor can be tied
from XTAL_IN to ground.
REF_CLK Input
For applications not requiring the use of the reference clock, it can
be left floating. Though not required, but for additional protection,
a 1k
resistor can be tied from the REF_CLK to ground.
LVCMOS Control Pins
All control pins have internal pull-downs; additional resistance is
not required but can be added for additional protection. A 1k
resistor can be used.
Outputs:
LVCMOS Outputs
All unused LVCMOS outputs can be left floating. We recommend
that there is no trace attached.
Power Supply Filtering Technique
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. To achieve optimum jitter per-
formance, power supply isolation is required. The ICS840004I-01
provides separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. VDD, VDDA and VDDO
should be individually connected to the power supply plane
through vias, and 0.01F bypass capacitors should be used for
each pin. Figure 1 illustrates this for a generic VDD pin and also
shows that VDDA requires that an additional 10 resistor along with
a 10
F bypass capacitor be connected to the V
DDA pin.
Figure 1. Power Supply Filtering
VDD
VDDA
3.3V
10
10F
.01F
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 840004AGIT | 制造商:Integrated Device Technology Inc 功能描述:PLL FREQ SYNTHESIZER SGL 20TSSOP - Tape and Reel |
| 840004AGLF | 功能描述:時鐘合成器/抖動清除器 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 |
| 840004AGLFT | 功能描述:時鐘合成器/抖動清除器 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 |
| 840004AGT | 制造商:Integrated Device Technology Inc 功能描述:840004AGT - Tape and Reel |
| 840004BGI-01LF | 功能描述:時鐘合成器/抖動清除器 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 |
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