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参数资料
| 型号： | ICS843002AGI |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 226.67 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： | 3/16页 |
| 文件大小： | 306K |
| 代理商： | ICS843002AGI |
843002AGI
www.icst.com/products/hiperclocks.html
REV. A JANUARY 4, 2006
11
Integrated
Circuit
Systems, Inc.
ICS843002I
FEMTOCLOCKS CRYSTAL-TO-3.3V, 2.5V
LVPECL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
Figure 5A shows a schematic example of the ICS843002I. 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
FIGURE 5A. ICS843002I SCHEMATIC EXAMPLE
18pF parallel resonant 26.5625MHz crystal is used. The
C1=27pF and C2=33pF are recommended for frequency ac-
curacy. For different board layout, the C1 and C2 may be
slightly adjusted for optimizing frequency accuracy.
FIGURE 5B. ICS843002I PC BOARD LAYOUT EXAMPLE
PC BOARD LAYOUT EXAMPLE
Figure 5B shows an example of ICS843002I 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.
TABLE 6. FOOTPRINT TABLE
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
ICS843002I
C7
0.1u
C1
27pF
Zo = 50 Ohm
C4
0.01u
C9
0.1u
To Logic
Input
pins
VCC
U1
ICS843002i
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
V
CCO
Q0
nQ
0
MR
nP
L
L_S
E
L
nc
VC
C
A
F
_
SEL
0
VC
C
F
_
SEL
1
XT
AL
_
O
U
T
XT
AL
_
IN
RE
F
_
CL
K
nX
T
A
L_S
E
L
VC
C
VE
E
nQ
1
Q1
VC
C
O
n
c
R9
50
Logic Control Input Examples
VCC
Set Logic
Input to
'0'
R3
133
Set Logic
Input to
'1'
R8
50
Zo = 50 Ohm
RU2
Not Install
Zo = 50 Ohm
R2
10
C6
0.1u
R4
82.5
R7
50
R5
133
C3
10uF
VCCO=3.3V
+
-
Optional Termination
RD1
Not Install
VCC
VCCO
VCC=3.3V
+
-
VC
C
VCCA
3.3V
RD2
1K
To Logic
Input
pins
VCCO
C2
33pF
C8
0.1u
RU1
1K
Zo = 50 Ohm
VCC
18pF
X1
26.5625MHz
R6
82.5
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|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| ICS843002AGILF | 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 |
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