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参数资料
| 型号： | I2781A-08TT |
| 厂商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分类： | XO, clock |
| 英文描述： | General Purpose EMI Reduction IC |
| 中文描述： | 78 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封装： | TSSOP-8 |
| 文件页数： | 2/11页 |
| 文件大小： | 169K |
| 代理商： | I2781A-08TT |
July 2005
rev 1.5
Pin Configuration
Pin Description (P278XA)
Pin#
Pin Name
P2781/82/84
General Purpose EMI Reduction IC
2 of 11
Notice: The information in this document is subject to change without notice.
Type
Description
1
XIN/CLKIN
I
Connect to crystal or clock input. This pin has dual functions. It can be connected
either to an external crystal or an external reference clock.
Crystal connection. If using an external reference, this pin must be left
unconnected.
Digital logic input used to select input frequency range
(see the Input Frequency Selection Table). This pin has an internal pull-up
resistor.
External Loop Filter for the PLL. By changing the value of the CRC circuit, the
percentage spread can be adjusted accordingly. See the Loop Filter Selection
Table for detail value.
Ground Connection. Connect to system ground.
2
XOUT
O
3
FS1
I
4
LF
I
5
VSS
I
6
ModOUT
O
Spread Spectrum Clock Output.
Digital logic input used to select input frequency range
(see the Input Frequency Selection Table). This pin has an internal pull-up
resistor.
Connect to +3.3 V
7
FS0
I
8
VDD
P
Input Frequency Selection Table
Output Frequency Scaling (MHz)
P2781A
P2782A
3 to 9
6 to 18
10 to 19
20 to 38
20 to 38
40 to 76
39 to 78
78 to 156
FS1
FS0
Input (MHz)
P2784A
12 to 36
40 to 76
80 to 152
156 to 312
Modulation Rate (KHz)
0
0
1
1
0
1
0
1
3 to 9
10 to 19
20 to 38
39 to 78
Fin / 128
Fin / 256
Fin / 512
Fin / 1024
1
2
3
4
8
7
6
5
XIN / CLKIN
XOUT
FS1
LF
VDD
FS0
ModOUT
VSS
P278XA-08S
P278XA-08T
Standard pin Configuration offered in both
8 pin SOIC and TSSOP Packages
相关PDF资料 |
PDF描述 |
|---|---|
| I2782A-08SR | General Purpose EMI Reduction IC |
| I2782A-08ST | General Purpose EMI Reduction IC |
| I2782A-08TR | General Purpose EMI Reduction IC |
| I2782A-08TT | General Purpose EMI Reduction IC |
| I2782AF-08TR | General Purpose EMI Reduction IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| I2781AF-08SR | 制造商:PULSECORE 制造商全称:PulseCore Semiconductor 功能描述:General Purpose EMI Reduction IC |
| I2781AF-08ST | 制造商:PULSECORE 制造商全称:PulseCore Semiconductor 功能描述:General Purpose EMI Reduction IC |
| I2781AF-08TR | 制造商:PULSECORE 制造商全称:PulseCore Semiconductor 功能描述:General Purpose EMI Reduction IC |
| I2781AF-08TT | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:General Purpose EMI Reduction IC |
| I2781AG-08SR | 功能描述:时钟发生器及支持产品 3-78MHZ 3.3V 1X GP EMI RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
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