參數(shù)資料
型號(hào)： ICS843003
英文描述： FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
中文描述： FEMTOCLOCKS晶體到3.3的LVPECL頻率合成器
文件頁(yè)數(shù)： 4/17頁(yè)
文件大?。?/td> 295K
代理商： ICS843003
843003AG
www.icst.com/products/hiperclocks.html
REV. A JULY 27, 2004
12
Integrated
Circuit
Systems, Inc.
ICS843003
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL
FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
Figure 5A shows a schematic example of the ICS843003. 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
FIGURE 5A. ICS843003 SCHEMATIC EXAMPLE
pF parallel resonant 31.25MHz crystal is used. The C1=27pF
and C2=33pF are recommended for frequency accuracy.
The C1 and C2 may be slightly adjusted for optimizing fre-
quency accuracy.
FIGURE 5B. ICS843003 PC BOARD LAYOUT EXAMPLE
R7
133
C2
33pF
Set Logic
Input to
'0'
VCCA
VCCO=3.3V
R6
82.5
RD2
1K
VCC
RU2
Not Install
VDD
C8
0.1u
C3
10uF
R9
133
Zo = 50 Ohm
VDD
+
-
RU1
1K
3.3V
R2
10
VCC
X1
31.25MHz
R4
82.5
U1
ICS843003
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
D
IV_
SEL
B0
VC
O
_
SEL
MR
V
CCO
_
A
QA
0
nQ
A
0
OE
B
OE
A
FB
_
D
IV
VC
C
A
VC
C
D
IV_
SEL
A0
D
IV_
SEL
A
1
VE
E
XT
AL
_
O
U
T
XT
AL
_
IN
TE
S
T_
C
L
K
XT
AL
_
SEL
nQB
1
QB
1
nQB
0
QB
0
V
CCO
_
B
D
IV_
SEL
B
1
+
-
To Logic
Input
pins
C7
0.1u
Set Logic
Input to
'1'
VC
C
O
R5
133
Zo = 50 Ohm
18pF
R10
82.5
C1
27pF
VCC=3.3V
R8
82.5
R3
133
Zo = 50 Ohm
VCCO
RD1
Not Install
C4
0.01u
Logic Control Input Examples
Zo = 50 Ohm
C6
0.1u
To Logic
Input
pins
3.3V
PC BOARD LAYOUT EXAMPLE
Figure 5B shows an example of ICS843003 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 7. 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.
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
,
7
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 7. FOOTPRINT TABLE
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICS843003AG 制造商:ICSI 制造商全稱:Integrated Circuit Solution Inc 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
ICS843003AGI-01 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
ICS843003AGI-01LF 功能描述:IC SYNTHESIZER LVPECL 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)包裝:27 系列:Precision Edge® 類型:頻率合成器 PLL:是 輸入:PECL，晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/是 頻率 - 最大:800MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
ICS843003AGI-01LFT 功能描述:IC SYNTHESIZER LVPECL 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時(shí)鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT
ICS843003AGI-01T 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
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