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參數(shù)資料
| 型號(hào)： | ICS843003AGLF |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 700 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| 封裝： | 4.40 X 7.80 MM, 0.925 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-24 |
| 文件頁數(shù)： | 5/21頁 |
| 文件大?。?/td> | 1125K |
| 代理商： | ICS843003AGLF |
ICS843003
FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
IDT / ICS LVPECL FREQUENCY SYNTHESIZER
13
ICS843003AG REV. A FEBRUARY 19, 2008
Crystal Input Interface
The ICS843003 has been characterized with 18pF parallel
resonant crystals. The capacitor values shown in Figure 3
below were determined using a 31.25MHz or 26.041666MHz
18pF parallel resonant crystal and were chosen to minimize the
ppm error.
Figure 3. Crystal Input Interface
LVCMOS to XTAL Interface
The XTAL_IN input can accept a single-ended LVCMOS signal
through an AC coupling capacitor. A general interface diagram is
shown in Figure 4. The XTAL_OUT pin can be left floating. The
input edge rate can be as slow as 10ns. For LVCMOS inputs, it is
recommended that the amplitude be reduced from full swing to half
swing in order to prevent signal interference with the power rail and
to reduce noise. This configuration requires that the output
impedance of the driver (Ro) plus the series resistance (Rs) equals
the transmission line impedance. In addition, matched termination
at the crystal input will attenuate the signal in half. This can be
done in one of two ways. First, R1 and R2 in parallel should equal
the transmission line impedance. For most 50
applications, R1
and R2 can be 100
. This can also be accomplished by removing
R1 and making R2 50
.
Figure 4. General Diagram for LVCMOS Driver to XTAL Input Interface
XTAL_IN
XTAL_OUT
X1
18pF Parallel Crystal
C1
33p
C2
27p
XTAL_IN
XTAL_OUT
Ro
Rs
Zo = Ro + Rs
50
0.1f
R1
R2
VCC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS843004AG-01LFT | 156.25 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843004AG-02LFT | 637.5 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843004AG-02LF | 680 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843004AGI-01 | 170 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843004AGI-04LFT | 680 MHz, OTHER CLOCK GENERATOR, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843003AGLFT | 功能描述:IC SYNTHESIZER LVPECL 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時(shí)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(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS843003AGT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AI01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003I-01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003I-09 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FEMTOCLOCKS? CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
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