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參數(shù)資料
| 型號： | ICS840021 |
| 英文描述： | Hex inverter buffers / drivers with high-voltage outputs 14-SOIC 0 to 70 |
| 中文描述： | FEMTOCLOCKS？水晶到的LVCMOS / LVTTL時鐘發(fā)生器 |
| 文件頁數(shù)： | 6/11頁 |
| 文件大?。?/td> | 202K |
| 代理商： | ICS840021 |
840021AG
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 30, 2004
6
Integrated
Circuit
Systems, Inc.
ICS840021
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-
LVCMOS/LVTTL C
LOCK
G
ENERATOR
A
PPLICATION
I
NFORMATION
Figure 2. C
RYSTAL
I
NPU
t I
NTERFACE
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS840021 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 2 below were determined using a 25MHz, 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.
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. The ICS840021 provides separate
power supplies to isolate any high switching noise from the out-
puts to the internal PLL. V
DD
and V
DDA
should be individually con-
nected to the power supply plane through vias, and bypass ca-
pacitors 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 10
μ
F and a .01
μ
F
bypass capacitor should be connected to each V
DDA
pin.
P
OWER
S
UPPLY
F
ILTERING
T
ECHNIQUES
F
IGURE
1. P
OWER
S
UPPLY
F
ILTERING
10
V
DDA
10
μ
F
.01
μ
F
3.3V
.01
μ
F
V
DD
C1
33p
X1
18pF Parallel Crystal
C2
27p
XTAL_OUT
XTAL_IN
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PDF描述 |
|---|---|
| ICS840021AG | FEMTOCLOCKS? CRYSTAL-TO-LVCMOS/ LVTTL CLOCK GENERATOR |
| ICS840021AGT | FEMTOCLOCKS? CRYSTAL-TO-LVCMOS/ LVTTL CLOCK GENERATOR |
| ICS840022 | FEMTOCLOCKS⑩CRYSTAL-TO LVCMOS/LVTTL CLOCK GENERATOR |
| ICS840022AG | FEMTOCLOCKS⑩CRYSTAL-TO LVCMOS/LVTTL CLOCK GENERATOR |
| ICS840022AGT | FEMTOCLOCKS⑩CRYSTAL-TO LVCMOS/LVTTL CLOCK GENERATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS840021AG | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS? CRYSTAL-TO-LVCMOS/ LVTTL CLOCK GENERATOR |
| ICS840021AGI | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840021AGILF | 功能描述:IC CLK GEN GIGABIT ETH 8-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標準包裝:1,000 系列:- 類型:時鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應商設備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS840021AGILFT | 功能描述:IC CLOCK GENERATOR 8-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標準包裝:2,000 系列:- 類型:PLL 時鐘發(fā)生器 PLL:帶旁路 輸入:LVCMOS，LVPECL 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:2:11 差分 - 輸入:輸出:是/無 頻率 - 最大:240MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:32-LQFP 供應商設備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
| ICS840021AGIT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS? CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
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