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參數(shù)資料
| 型號： | ICS84314AY-02LF |
| 英文描述： | 700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| 中文描述： | 700MHz的，CRYSTAL-TO-3.3V/2.5V LVPECL的頻率合成瓦/扇出緩沖器 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大?。?/td> | 196K |
| 代理商： | ICS84314AY-02LF |
84314AY-02
www.icst.com/products/hiperclocks.html
REV. B NOVEMBER 17, 2005
10
Integrated
Circuit
Systems, Inc.
ICS84314-02
700MH
Z
, C
RYSTAL
-
TO
-3.3V/2.5V LVPECL
F
REQUENCY
S
YNTHESIZER
W
/F
ANOUT
B
UFFER
PRELIMINARY
Figure 3. C
RYSTAL
I
NPU
t I
NTERFACE
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS84314-02 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 3
below were determined using a 25MHz, 18pF paral-
lel resonant crystal and were chosen to minimize the ppm
error. The optimum C1 and C2 values can be slightly adjusted
for different board layouts.
ICS84332
XTAL_IN
XTAL_OUT
X1
18pF Parallel Crystal
C2
22p
C1
22p
V
CC
- 2V
50
Ω
50
Ω
RTT
Z
o
= 50
Ω
Z
o
= 50
Ω
FOUT
FIN
RTT =
Z
o
1
((V
OH
+ V
OL
) / (V
CC
– 2)) – 2
3.3V
125
Ω
125
Ω
84
Ω
84
Ω
Z
o
= 50
Ω
Z
o
= 50
Ω
FOUT
FIN
The clock layout topology shown below is a typical termina-
tion 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
F
IGURE
4B. LVPECL O
UTPUT
T
ERMINATION
F
IGURE
4A. LVPECL O
UTPUT
T
ERMINATION
drive 50
Ω
transmission lines. Matched impedance techniques
should be used to maximize operating frequency and minimize
signal distortion.
Figures 4A and 4B
show two different lay-
outs which are recommended only as guidelines. Other suit-
able 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 varia-
tions.
T
ERMINATION
FOR
3.3V LVPECL O
UTPUTS
相關PDF資料 |
PDF描述 |
|---|---|
| ICS84314AY-02LFT | 700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314AY-02T | 700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314AY | 350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314AYT | 350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314 | Dual J-K Flip-Flops With Clear 14-PDIP 0 to 70 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICS84314AY-02LFT | 功能描述:IC SYNTHESIZER 700MHZ 32-LQFP 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™ 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 |
| ICS84314AY-02T | 制造商:ICS 制造商全稱:ICS 功能描述:700MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
| ICS84314AYLF | 功能描述:IC SYNTHESIZER 350MHZ 32-LQFP 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™ 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 |
| ICS84314AYLFT | 功能描述:IC SYNTHESIZER 350MHZ 32-LQFP 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™ 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 |
| ICS84314AYT | 制造商:ICS 制造商全稱:ICS 功能描述:350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER |
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