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参数资料
| 型号： | ICS840004AG-01LFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 175 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| 封装： | 6.50 X 4.40 MM, 0.92 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-20 |
| 文件页数： | 2/14页 |
| 文件大小： | 418K |
| 代理商： | ICS840004AG-01LFT |
Integrated
Circuit
Systems, Inc.
8400042AG-01
www.icst.com/products/hiperclocks.html
REV. A FEBRUARY 28, 2006
10
ICS840004-01
FEMTOCLOCKSCRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
LAYOUT GUIDELINE
Figure 4 shows a schematic example of the ICS840004-01.
An example of LVCMOS termination is shown in this sche-
matic. Additional LVCMOS termination approaches are shown
in the LVCMOS Termination Application Note. In this example,
an 18pF parallel resonant 25MHz crystal is used. The
FIGURE 4. ICS840004-01 SCHEMATIC EXAMPLE
C1=22pF and C2=22pF are recommended for frequency ac-
curacy. For different board layout, the C1 and C2 may be
slightly adjusted for optimizing frequency accuracy. 1K
Ω pullup
or pulldown resistors can be used for the logic control input
pins.
R5
100
RU1
1K
Zo = 50 Ohm
R4
100
R2
10
Unused outputs can be left floating. There should be
no trace attached to unused outputs. Device
characterized and specification limits set with all
outputs terminated.
VDD
C3
10uF
C1
22pF
RU2
Not Install
RD2
1K
C6
0.1u
XTAL_IN
VDD
If not using the crystal input, it can be left floating.
For additional protection the XTAL_IN pin can be
tied to ground.
Logic Control Input Examples
VDDO
VDD
VDDA
X1
Set Logic
Input to
'1'
U1
ICS840004_01
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
20
19
18
17
F_SEL0
nc
nXTAL_SEL
REF_CLK
OE
MR
nPLL_SEL
VDDA
nc
VDD
XTAL_OUT
XTAL_IN
GND
Q3
Q2
VDDO
F_SEL1
GND
Q0
Q1
VDD
To Logic
Input
pins
LVCMOS
R3
36
RD1
Not Install
C2
22pF
VDD=3.3V
VDD
VDDO=3.3V
To Logic
Input
pins
C5
0.1u
Optional Termination
Zo = 50 Ohm
XTAL_OUT
VDD
C4
0.01u
LVCMOS
Set Logic
Input to
'0'
ICS840004-01
FEMTOCLOCKS CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER
TSD
IDT / ICS FEMTOCLOCKS CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER
ICS840004-01
10
相关PDF资料 |
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| ICS840008AR-01T | 160 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS840008BR-01LF | 160 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS840014AGI | 106.25 MHz, OTHER CLOCK GENERATOR, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS840004AG-01T | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004AG-11 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004AG-11LF | 功能描述:IC FREQ SYNTHESIZER 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 |
| ICS840004AG-11LFT | 功能描述:IC FREQ SYNTHESIZER 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 |
| ICS840004AG-11T | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
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