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參數(shù)資料
| 型號： | ICS843001BGILF |
| 英文描述： | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| 中文描述： | FEMTOCLOCKS⑩晶體至3.3V的LVPECL時(shí)鐘發(fā)生器 |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 233K |
| 代理商： | ICS843001BGILF |
843001BKI
www.icst.com/products/hiperclocks.html
REV. A OCTOBER 6, 2005
7
Integrated
Circuit
Systems, Inc.
ICS843001BI
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
PRELIMINARY
F
IGURE
3A. ICS843001BI S
CHEMATIC
E
XAMPLE
L
AYOUT
G
UIDELINE
Figure 3A
shows a schematic example of the ICS843001BI.
An example of LVEPCL termination is shown in this sche-
matic. Additional LVPECL termination approaches are shown
in the LVPECL Termination Application Note. In this example,
an 18pF parallel resonant crystal is used. The C1 = 27pF and
C2 = 33pF are recommended for frequency accuracy. The C1
and C2 values may be slightly adjusted for optimizing fre-
quency accuracy.
F
IGURE
3B. ICS843001BI PC B
OARD
L
AYOUT
E
XAMPLE
PC B
OARD
L
AYOUT
E
XAMPLE
Figure 3B
shows an example of ICS843001BI P.C. board
layout. The crystal X1 footprint shown in this example allows
installation of either surface mount HC49S or through-hole
HC49 package. 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 ca-
pacitors 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
s
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
o
y
a
0
0
0
0
t
m
a
o
c
.
s
VCCA
C1
nQ
C4
0.01u
Q
R5
133
R1
1K
Zo = 50 Ohm
VCC
R6
82.5
18pF
C5
0.1u
C3
10uF
+
-
U1
ICS843001
1
2
3
4
8
7
6
5
VCCA
VEE
XTAL_OUT
XTAL_IN
VCC
Q0
nQ0
FREQ_SEL
VCC
R3
133
R4
82.5
VCC
Zo = 50 Ohm
X1
26.5625MHz
R2
10
VCC
C2
33pF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS843001BGILFT | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843001BGIT | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843001BI | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843001BKI | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843001BKILF | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843001BGILFT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843001BGIT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843001BI | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843001BKI | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS843001BKILF | 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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