參數(shù)資料
型號(hào)： ICS843034AYLFT
英文描述： MULTI-RATE 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
中文描述： 多速率3.3伏，2.5伏的LVPECL頻率合成器
文件頁(yè)數(shù)： 16/23頁(yè)
文件大?。?/td> 250K
代理商： ICS843034AYLFT
843034AY
www.icst.com/products/hiperclocks.html
REV. A JULY 25, 2005
16
Integrated
Circuit
Systems, Inc.
ICS843034
F
EMTO
C
LOCKS
M
ULTI
-R
ATE
3.3V, 2.5V LVPECL F
REQUENCY
S
YNTHESIZER
PRELIMINARY
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.
FOUTx and nFOUTx 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
6B. LVPECL O
UTPUT
T
ERMINATION
F
IGURE
6A. 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 6A and 6Bshow 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.
T
ERMINATION
FOR
3.3V LVPECL O
UTPUT
Figure 5. C
RYSTAL
I
NPU
t I
NTERFACE
ICS84332
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS843034 has been characterized with 18pF parallel resonant
crystals. The capacitor values, C1 and C2, shown in Figure 5 below
were determined using a 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.
843034
C1
18p
X1
18pF Parallel Crystal
C2
22p
XTAL_OUT
XTAL_IN
相關(guān)PDF資料
PDF描述
ICS843034AYT MULTI-RATE 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
ICS843071AGI FEMTOCLOCKS⑩ CRYSTAL-TO- LVPECL CLOCK GENERATOR
ICS843071AGILF FEMTOCLOCKS⑩ CRYSTAL-TO- LVPECL CLOCK GENERATOR
ICS843071AGILFT FEMTOCLOCKS⑩ CRYSTAL-TO- LVPECL CLOCK GENERATOR
ICS843071AGIT FEMTOCLOCKS⑩ CRYSTAL-TO- LVPECL CLOCK GENERATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICS843034AYT 制造商:ICS 制造商全稱(chēng):ICS 功能描述:MULTI-RATE 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
ICS843051 制造商:ICS 制造商全稱(chēng):ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR
ICS8430-51 制造商:ICS 制造商全稱(chēng):ICS 功能描述:600MHZ, LOW JITTER LVCMOS/ LVTTL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
ICS843051AG 制造商:ICS 制造商全稱(chēng):ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR
ICS843051AGLF 功能描述:IC CLK GEN GIG ETH LVPECL 8TSSOP RoHS:是 類(lèi)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:2,000 系列:- 類(lèi)型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無(wú)/無(wú) 頻率 - 最大:1GHz 除法器/乘法器:是/無(wú) 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-LSSOP（0.175"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱(chēng):NJW1504V-TE1-NDNJW1504V-TE1TR
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