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参数资料
| 型号： | ICS408MT |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 80 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO8 |
| 封装： | 0.150 INCH, SOIC-8 |
| 文件页数： | 2/6页 |
| 文件大小： | 66K |
| 代理商： | ICS408MT |
PC PERIPHERAL CLOCK
MDS 408 B
2
Revision 032602
Integrated Circuit Systems, Inc. q 525 Race Street, San Jose, CA 95126 q tel (408) 295-9800 q
www.icst.com
ICS408
Pin Assignment
40/80M Frequency Selection
* Frequency after power up
Pin Descriptions
External Components
Series Termination Resistor
Clock output traces over one inch should use series
termination. To series terminate a 50
trace (a
commonly used trace impedance), place a 33
resistor
in series with the clock line, as close to the clock output
pin as possible. The nominal impedance of the clock
output is 20
.
Decoupling Capacitor
As with any high performance mixed-signal IC, the
ICS408 must be isolated from system power supply
noise to perform optimally.
A decoupling capacitor of 0.01F must be connected
between VDD and the PCB ground plane.
Crystal Load Capacitors
The device crystal connections should include pads for
small capacitors from X1 to ground and from X2 to
ground. These capacitors are used to adjust the stray
capacitance of the board to match the nominally
required crystal load capacitance. Because load
capacitance can only be increased in this trimming
process, it is important to keep stray capacitance to a
minimum by using very short PCB traces (and no vias)
1
2
3
X1
4
VDD
GND
O E/LAT
24.576M
40/80M
25M
8
7
6
5
X2
8 Pin (1 50 mi l ) SO IC
At Power Up
Pin 3* (40/80)
040M
180M
Pin
Number
Pin
Name
Pin
Type
Pin Description
1
X1
Input
Crystal connection. Connect to 14.31818 MHz parallel mode crystal.
2
24.576M
Output
24.576 MHz clock output. Tri-state when OE/LAT is low.
3
40/80M
Input/
Output
40M or 80M selectable clock output. Latched on rising edge of
OE/LAT. Tri-state when OE/LAT is low.
4
25M
Output
25 MHz clock output.
5
GND
Power
Connect to ground.
6
VDD
Power
Connect to voltage supply.
7
OE/LAT
Input
Disables or latches 40/80 MHz output.
8
X2
Input
Crystal connection. Connect to 14.31818 MHz parallel mode crystal.
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| ICS409 | 制造商:ICS 制造商全称:ICS 功能描述:PC PERIPHERAL CLOCK |
| ICS409M | 功能描述:IC PC PERIPHERAL CLOCK 8-SOIC 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:- 产品变化通告:Product Discontinuation 04/May/2011 标准包装:96 系列:- 类型:时钟倍频器，零延迟缓冲器 PLL:带旁路 输入:LVTTL 输出:LVTTL 电路数:1 比率 - 输入:输出:1:8 差分 - 输入:输出:无/无 频率 - 最大:133.3MHz 除法器/乘法器:是/无 电源电压:3 V ~ 3.6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:管件 其它名称:23S08-5HPGG |
| ICS409MLF | 功能描述:IC PC PERIPHERAL CLOCK 8-SOIC 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:- 产品变化通告:Product Discontinuation 04/May/2011 标准包装:96 系列:- 类型:时钟倍频器，零延迟缓冲器 PLL:带旁路 输入:LVTTL 输出:LVTTL 电路数:1 比率 - 输入:输出:1:8 差分 - 输入:输出:无/无 频率 - 最大:133.3MHz 除法器/乘法器:是/无 电源电压:3 V ~ 3.6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:管件 其它名称:23S08-5HPGG |
| ICS409MLFT | 功能描述:IC PC PERIPHERAL CLOCK 8-SOIC 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:- 产品变化通告:Product Discontinuation 04/May/2011 标准包装:96 系列:- 类型:时钟倍频器，零延迟缓冲器 PLL:带旁路 输入:LVTTL 输出:LVTTL 电路数:1 比率 - 输入:输出:1:8 差分 - 输入:输出:无/无 频率 - 最大:133.3MHz 除法器/乘法器:是/无 电源电压:3 V ~ 3.6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:管件 其它名称:23S08-5HPGG |
| ICS409MT | 功能描述:IC PC PERIPHERAL CLOCK 8-SOIC 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:- 产品变化通告:Product Discontinuation 04/May/2011 标准包装:96 系列:- 类型:时钟倍频器，零延迟缓冲器 PLL:带旁路 输入:LVTTL 输出:LVTTL 电路数:1 比率 - 输入:输出:1:8 差分 - 输入:输出:无/无 频率 - 最大:133.3MHz 除法器/乘法器:是/无 电源电压:3 V ~ 3.6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:管件 其它名称:23S08-5HPGG |
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