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参数资料
| 型号： | ICS843001AGLFT |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 226.66 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封装： | 4.40 MM X 3 MM, 0.925 MM HEIGHT, LEAD FREE, MO-153, TSSOP-8 |
| 文件页数： | 15/15页 |
| 文件大小： | 246K |
| 代理商： | ICS843001AGLFT |
843001AG
www.icst.com/products/hiperclocks.html
REV. B DECEMBER 14, 2004
9
Integrated
Circuit
Systems, Inc.
ICS843001
FEMTOCLOCKSCRYSTAL-TO-
3.3V LVPECL CLOCK GENERATOR
FIGURE 3A. ICS843001 SCHEMATIC EXAMPLE
LAYOUT GUIDELINE
Figure 3A shows a schematic example of the ICS843001. 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 18pF
parallel resonant crystal is used. The C1 = 27pF and C2 = 33pF
are recommended for frequency accuracy. The C1 and C2 val-
ues may be slightly adjusted for optimizing frequency accuracy.
FIGURE 3B. ICS843001 PC BOARD LAYOUT EXAMPLE
VCCA
C1
27pF
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
PC BOARD LAYOUT EXAMPLE
Figure 3B shows an example of ICS843001 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
5
C
,
4
C3
0
6
0
2
R3
0
6
0
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
e
z
i
s
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS843001AGT | 制造商:ICS 制造商全称:ICS 功能描述:FEMTO CLOCKS CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR |
| ICS843001AI22 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL/LVCMOS-TO-3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
| ICS843001AI23 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER |
| ICS843001AK-40LF | 功能描述:IC SYNTHESIZER LVPECL 16-VFQFPN 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 |
| ICS843001AK-40LFT | 功能描述:IC SYNTHESIZER LVPECL 16-VFQFPN 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 |
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