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參數(shù)資料
| 型號： | ICS843004AGT |
| 英文描述： | FEMTOCLOCKS⑩ LVCMOS/CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS⑩LVCMOS/CRYSTAL-TO- 3.3 LVPECL的頻率合成器 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大小： | 299K |
| 代理商： | ICS843004AGT |
843004AG
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 18, 2004
10
Integrated
Circuit
Systems, Inc.
ICS843004
F
EMTO
C
LOCKS
LVCMOS/C
RYSTAL
-
TO
-
3.3V LVPECL F
REQUENCY
S
YNTHESIZER
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS843004 has been characterized with 18pF parallel
resonant crystals. The capacitor values shown in Figure 3
Figure 3. C
RYSTAL
I
NPU
t I
NTERFACE
below were determined using a 26.5625MHz 18pF parallel
resonant crystal and were chosen to minimize the ppm error.
ICS843004
C1
33p
X1
18pF Parallel Crystal
C2
27p
XTAL_OUT
XTAL_IN
Zo = 50 Ohm
U1
ICS843004
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
R7
133
VCC
C1
RU1
1K
C8
To Logic
Input
pins
VCCO=3.3V
C2
33pF
Set Logic
Input to
'1'
C7
Zo = 50 Ohm
R5
133
C4
0.01u
Set Logic
Input to
'0'
To Logic
Input
pins
VCCA
X1
25MHz
C3
10uF
+
-
VCC
RD2
1K
V
VCC=3.3V
C6
0.1u
R4
82.5
18pF
RU2
Not Install
+
-
VDD
R3
133
3.3V
VDD
R10
82.5
Zo = 50 Ohm
R9
133
VCCO
Logic Control Input Examples
R6
82.5
R2
10
R8
82.5
RD1
Not Install
Zo = 50 Ohm
V
3.3V
C9
L
AYOUT
G
UIDELINE
Figure 4 shows a schematic example of the ICS843004. An ex-
ample of LVEPCL termination is shown in this schematic. Addi-
tional LVPECL termination approaches are shown in the LVPECL
Termination Application Note. In this example, an 18pF parallel
F
IGURE
4. ICS843004 S
CHEMATIC
E
XAMPLE
resonant 26.5625MHz 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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843004AI01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004AI04 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL/LVCMOS-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004I | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004I-01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004I-04 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL/LVCMOS-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
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