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參數(shù)資料
| 型號： | ICS843AG-75LF |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 75 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | 4.40 X 3 MM, 0.925 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-8 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 189K |
| 代理商： | ICS843AG-75LF |
843AG-75
www.icst.com/products/hiperclocks.html
REV. A JANUARY 9, 2006
7
Integrated
Circuit
Systems, Inc.
ICS843-75
75MHZ, LVCMOS, LVPECL
DUAL OUTPUT OSCILLATOR
TERMINATION FOR 3.3V LVPECL OUTPUT
The clock layout topology shown below is a typical termination
for LVPECL outputs. The two different layouts mentioned are
recommended only as guidelines.
FOUT and nFOUT are low impedance follower outputs that
generate ECL/LVPECL compatible outputs.Therefore, terminat-
ing resistors (DC current path to ground) or current sources
must be used for functionality. These outputs are designed to
FIGURE 2B. LVPECL OUTPUT TERMINATION
FIGURE 2A. LVPECL OUTPUT TERMINATION
drive 50
Ω transmission lines.Matched impedance techniques
should be used to maximize operating frequency and minimize
signal distortion. Figures 2A and 2B show two different layouts
which are recommended only as guidelines. Other suitable clock
layouts may exist and it would be recommended that the board
designers simulate to guarantee compatibility across all printed
circuit and clock component process variations.
V
CC - 2V
50
Ω
50
Ω
RTT
Z
o = 50Ω
Z
o = 50Ω
FOUT
FIN
RTT =
Z
o
1
((V
OH + VOL) / (VCC – 2)) – 2
3.3V
125
Ω
125
Ω
84
Ω
84
Ω
Z
o = 50Ω
Z
o = 50Ω
FOUT
FIN
FREQUENCY STABILITY
The table shown below provides a basic guideline in se-
lecting the proper quartz crystal that meets a timing budget
of ±100ppm. For more information on selecting the proper
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p
crystal, see the application note, Crystal Timing Budget
and Accuracy for FemtoClock .
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS843AM-75LF | 75 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS843AM-75T | 75 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS843AGI-75LFT | 75 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS843AMI-75T | 75 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS843AGI-75 | 75 MHz, OTHER CLOCK GENERATOR, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843AG-75LFT | 制造商:ICS 制造商全稱:ICS 功能描述:75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS843AG-75T | 制造商:ICS 制造商全稱:ICS 功能描述:75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS843AGI-75 | 制造商:ICS 制造商全稱:ICS 功能描述:75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS843AGI-75LF | 制造商:ICS 制造商全稱:ICS 功能描述:75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS843AGI-75LFT | 制造商:ICS 制造商全稱:ICS 功能描述:75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
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