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参数资料
| 型号： | ICS841608AKI |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 2/17页 |
| 文件大小： | 0K |
| 描述： | IC CLOCK GENERATOR 32-VFQFPN |
| 产品培训模块： | PCI-Express |
| 标准包装： | 490 |
| 系列： | HiPerClockS™, FemtoClock™ |
| 类型： | 时钟发生器，扇出配送，多路复用器 |
| PLL： | 带旁路 |
| 输入： | LVCMOS，LVTTL，晶体 |
| 输出： | HCSL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 2:8 |
| 差分 - 输入:输出： | 无/是 |
| 频率 - 最大： | 125MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-VFQFPN（5x5） |
| 包装： | 托盘 |
| 其它名称： | 841608AKI |
IDT / ICS HCSL CLOCK GENERATOR
10
ICS841608AKI REV. A JUNE 18, 2008
ICS841608I
FEMTOCLOCKS CRYSTAL-TO-HCSL CLOCK GENERATOR
FIGURE 5. ICS841608I SCHEMATIC EXAMPLE
SCHEMATIC EXAMPLE
Figure 5 shows an example of ICS841608I application
schematic. In this example, the device is operated at V
DD
= 3.3V.
The 18pF parallel resonant 25MHz crystal is used. The C1 =
27pF and C2 = 27pF are recommended for frequency accuracy.
For different board layout, the C1 and C2 may be slightly
adjusted for optimizing frequency accuracy. Two examples of
HCSL terminations are shown in this schematic. The decoupling
capacitors should be located as close as possible to the power
pin.
INPUTS:
CRYSTAL INPUTS
For applications not requiring the use of the crystal oscillator input,
both XTAL_IN and XTAL_OUT can be left floating. Though not
required, but for additional protection, a 1k
Ω resistor can be tied
from XTAL_IN to ground.
REF_IN INPUT
For applications not requiring the use of the reference clock,
it can be left floating. Though not required, but for additional
protection, a 1k
Ω resistor can be tied from the REF_IN to ground.
LVCMOS CONTROL PINS
All control pins have internal pulldowns; additional resistance is
not required but can be added for additional protection. A 1k
Ω
resistor can be used.
RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS
OUTPUTS:
HCSL OUTPUTs
All unused HCSL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential output
pair should either be left floating or terminated.
C3
0. 1u
+
-
R8
50
VDD
X1
25MHz
TL4
Zo = 50
VDD
Set Logic
Input to
'0'
RD2
1K
TL3
Zo = 50
To Logic
Input
pins
C1
27pF
U1
ICS841608I
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
32
31
30
29
28
27
26
25
XTAL_I N
XTAL_OUT
MR/nOE
VDD
Q0
nQ0
Q1
nQ1
GN
D
Q2
nQ
2
Q3
nQ
3
VD
D
Q4
nQ
4
Q5
nQ5
GND
Q6
nQ6
Q7
nQ7
VDD
GN
D
VD
D
RE
F
_
IN
RE
F
_
S
E
L
VD
D
A
BY
PAS
S
IR
E
F
FS
E
L
+
-
R6
50
MR/nOE
FS
E
L
Recommended for PCI
Express Point-to-Point
Connection
VDD=3.3V
VDD
Set Logic
Input to
'1'
RE
F
_
S
E
L
R4
33
VDD
RD1
Not I nstall
R1
10
R7
50
VDD
VDDA
C2
27pF
(U1:6)
RU1
1K
Logic Control Input Examples
(U1:14)
VDD
TL2
Zo = 50
To Logic
Input
pins
VDD
C7
.1uf
VDD
TL1
Zo = 50
18pF
VD
D
R3
33
(U1:31)
R5
50
BYP
ASS
Recommended for
PCI Express Add-In
Card
VDD
RU2
Not I nst all
C6
.1uf
C8
.1uf
C4
10u
C5
0.1u
HCSL Termination
(U1:24)
R2
475
VDD
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS841608AKILF | 功能描述:IC CLOCK GENERATOR 32VFQFPN 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:2,000 系列:- 类型:PLL 频率合成器 PLL:是 输入:晶体 输出:时钟 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/无 频率 - 最大:1GHz 除法器/乘法器:是/无 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-LSSOP（0.175"，4.40mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:NJW1504V-TE1-NDNJW1504V-TE1TR |
| ICS841608AKILFT | 功能描述:IC CLOCK GENERATOR 32-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 |
| ICS841608AKIT | 功能描述:IC CLOCK GENERATOR 32-VFQFPN RoHS:否 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 |
| ICS841608I | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:FEMTOCLOCKS CRYSTAL-TO-HCSL CLOCK GENERATOR VCO: 500MHz |
| ICS841654AGI | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:FEMTOCLOCKS? CRYSTAL-TO-HCSL CLOCK GENERATOR |
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