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参数资料
| 型号： | ICS843002AG-01T |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 170 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| 封装： | 6.50 X 4.40 MM, 0.92 MM HEIGHT, MO-153, TSSOP-20 |
| 文件页数： | 2/17页 |
| 文件大小： | 445K |
| 代理商： | ICS843002AG-01T |
843002AG-01
www.icst.com/products/hiperclocks.html
REV. B MAY 6, 2005
10
Integrated
Circuit
Systems, Inc.
ICS843002-01
FEMTOCLOCKSCRYSTAL-TO-
3.3V LVPECL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
Figure 4A shows a schematic example of the ICS843002-01.
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
FIGURE 4A. ICS843002-01 SCHEMATIC EXAMPLE
parallel resonant 26.5625MHz crystal is used. The C1=27pF
and C2=33pF are recommended for frequency accuracy. For
different board layout, the C1 and C2 may be slightly adjusted
for optimizing frequency accuracy.
PC BOARD LAYOUT EXAMPLE
Figure 4B shows an example of ICS843002-01 P.C. board lay-
out. The crystal X1 footprint shown in this example allows in-
stallation 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 capacitors should be
located as close as possible to the power pins. The layout as-
sumes that the board has clean analog power ground plane.
FIGURE 4B. ICS843002-01 PC BOARD LAYOUT EXAMPLE
C1
27pF
VCC
VCCO
Zo = 50 Ohm
R6
50
C6
0.1u
C4
0.01u
VC
C
X1
25 MHz
VCC=3.3V
18pF
To Logic
Input
pins
C7
0.1u
Zo = 50 Ohm
RU1
1K
To Logic
Input
pins
C9
0.1u
Set Logic
Input to
'1'
VCCO=3.3V
VCC
R5
50
U1
ICS843002-01
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
VC
C
O
Q0
nQ
0
MR
nP
LL_S
E
L
nc
V
CCA
F
_
SEL
0
VC
C
F
_
SEL
1
X
T
A
L_O
U
T
X
T
A
L_I
N
T
E
S
T
_C
LK
nX
T
A
L_S
E
L
VC
C
VE
E
nQ
1
Q1
VC
C
O
n
c
VCC
VCCO
RD2
1K
VCCA
R4
50
C3
10uF
Zo = 50 Ohm
RD1
Not Install
R2
10
Set Logic
Input to
'0'
Zo = 50 Ohm
+
-
C8
0.1u
R7
50
Logic Control Input Examples
R9
50
C2
33pF
R8
50
+
-
RU2
Not Install
e
c
n
e
r
e
f
e
Re
z
i
S
2
C
,
1
C2
0
4
0
3
C5
0
8
0
8
C
,
7
C
,
6
C
,
5
C
,
4
C3
0
6
0
2
R3
0
6
0
s
e
z
i
s
t
n
e
n
o
p
m
o
c
s
t
s
il
,
6
e
l
b
a
T
:
E
T
O
N
.
e
l
p
m
a
x
e
t
u
o
y
a
l
s
i
h
t
n
i
n
w
o
h
s
TABLE 6. FOOTPRINT TABLE
ICS843002-01
FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
TSD
IDT / ICS FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
ICS843002-01
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS843002AGI | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
| ICS843002AGI-01 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
| ICS843002AGI-01LF | 功能描述:IC SYNTHESIZER LVPECL 20-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™, FemtoClock™ 标准包装:27 系列:Precision Edge® 类型:频率合成器 PLL:是 输入:PECL，晶体 输出:PECL 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/是 频率 - 最大:800MHz 除法器/乘法器:是/无 电源电压:3.135 V ~ 5.25 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ICS843002AGI-01LFT | 功能描述:IC SYNTHESIZER LVPECL 20-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™, FemtoClock™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS843002AGI-01T | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
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