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參數(shù)資料
| 型號(hào)： | ICS843004-01 |
| 英文描述： | FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS -商標(biāo)晶體至3.3的LVPECL頻率合成器 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大小： | 227K |
| 代理商： | ICS843004-01 |
843004AG-01
www.icst.com/products/hiperclocks.html
REV. B MAY 6, 2005
9
Integrated
Circuit
Systems, Inc.
ICS843004-01
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-
3.3V LVPECL F
REQUENCY
S
YNTHESIZER
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS843004-01 has been characterized with 18pF paral-
lel resonant crystals. The capacitor values shown in Figure 3
Figure 3. C
RYSTAL
I
NPU
t I
NTERFACE
below were determined using a 25MHz 18pF parallel reso-
nant crystal and were chosen to minimize the ppm error.
ICS843004-01
C1
33p
X1
18pF Parallel Crystal
C2
27p
XTAL_OUT
XTAL_IN
VCC=3.3V
VDD
V
Zo = 50 Ohm
+
-
18pF
V
R5
133
RD1
To Logic
Input
pins
VCC
Zo = 50 Ohm
RU2
3.3V
R9
133
U1
ICS843004-01
1
2
3
4
5
6
7
8
9
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
n
Q
V
Q
n
M
n
N
V
F
V
F
X
X
V
T
n
V
V
n
Q
V
Q
n
VCC
C3
10uF
+
-
R3
C7
X1
25MHz
Zo = 50 Ohm
R7
3.3V
VDD
R6
VCCA
C4
0.01u
C8
VCCO=3.3V
Logic Control Input Examples
C6
0.1u
C2
33pF
C9
R2
10
RU1
1K
R4
Set Logic
Input to
'1'
C1
To Logic
Input
pins
R10
Zo = 50 Ohm
R8
Set Logic
Input to
'0'
VCCO
RD2
L
AYOUT
G
UIDELINE
Figure 4shows a schematic example of the ICS843004-01. An
example of LVEPCL termination is shown in this schematic. Ad-
ditional LVPECL termination approaches are shown in the
LVPECL Termination Application Note. In this example, an 18pF
F
IGURE
4. ICS843004-01 S
CHEMATIC
E
XAMPLE
parallel resonant 25MHz crystal is used. The C1=27pF and
C2=33pF are recommended for frequency accuracy. For differ-
ent board layout, the C1 and C2 may be slightly adjusted for
optimizing frequency accuracy.
相關(guān)PDF資料 |
PDF描述 |
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| ICS843004A01 | FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004AG-01 | FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004AG-01T | FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004-02 | CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004A02 | CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843004-02 | 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004-125 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FemtoClock? Crystal-to-3.3V LVPECL Frequency Synthesizer |
| ICS843004A01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004A02 | 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004AG | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ LVCMOS/CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
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