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參數(shù)資料
| 型號： | ICS843051 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Twisted Pair Flat Cable, 1700/26 28 AWG, .050 (1.27) |
| 中文描述： | FEMTOCLOCKS晶體至3.3V的LVPECL時鐘發(fā)生器 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 241K |
| 代理商： | ICS843051 |
843051AG
www.icst.com/products/hiperclocks.html
REV. A DECEMBER 14, 2004
9
Integrated
Circuit
Systems, Inc.
ICS843051
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
XTAL2
R1
1K
+
-
Zo = 50 Ohm
R3
133
R4
82.5
Q
X1
19.44MHz
VCC
C2
33pF
C5
C3
10uF
C4
R6
82.5
R2
10
VCC
C1
VCC
18pF
XTAL1
U1
ICS843051
1
2
3
4
8
7
6
5
VCCA
VEE
XTAL2
XTAL1
VCC
Q0
nQ0
FREQ_SEL
VCC
nQ
R5
133
Zo = 50 Ohm
VCCA
L
AYOUT
G
UIDELINE
Figure 3Ashows a schematic example of the ICS843051. An
example of LVEPCL termination is shown in this schematic.
Additional LVPECL termination approaches are shown in the
LVPECL Termination Application Note. In this example, an 18 pF
parallel resonant crystal is used. The C1 = 27pF and C2 = 33pF
are recommended for frequency accuracy. The C1 and C2 val-
ues may be slightly adjusted for optimizing frequency accuracy.
F
IGURE
3A. ICS843051 S
CHEMATIC
E
XAMPLE
F
IGURE
3B. ICS843051 PC B
OARD
L
AYOUT
E
XAMPLE
PC B
OARD
L
AYOUT
E
XAMPLE
Figure 3B shows an example of ICS843051 P.C. board layout.
The crystal X1 footprint shown in this example allows installa-
tion of either surface mount HC49S or through-hole HC49 pack-
age. The footprints of other components in this example are listed
in the Table 6. There should be at least one decoupling capacitor
per power pin. The decoupling capacitors should be located as
close as possible to the power pins. The layout assumes that
the board has clean analog power ground plane.
T
ABLE
6. F
OOTPRINT
T
ABLE
e
c
n
e
r
e
R
2
C
,
C
3
C
5
C
,
C
2
R
e
a
T
:
E
T
O
N
n
n
w
o
h
s
s
e
z
e
2
5
3
3
e
n
x
e
z
S
4
0
8
0
6
0
6
0
o
p
m
t
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.
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| ICS8430-51 | 制造商:ICS 制造商全稱: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: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 類別:集成電路 (IC) >> 時鐘/計(jì)時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/無 頻率 - 最大:1GHz 除法器/乘法器:是/無 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類型: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:NJW1504V-TE1-NDNJW1504V-TE1TR |
| ICS843051AGLFT | 功能描述:IC CLOCK GENERATOR LVPECL 8TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計(jì)時 - 時鐘發(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 |
| ICS843051AGT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
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