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参数资料
| 型号： | I2784AF-08TR |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 312 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封装： | ROHS COMPLIANT, TSSOP-8 |
| 文件页数： | 6/11页 |
| 文件大小： | 384K |
| 代理商： | I2784AF-08TR |
P2781/82/84
Rev. 2 | Page 4 of 11 | www.onsemi.com
Spread Spectrum Selection
The P278xA performs Zero Cycle Slip when set at low
percentage spreading. This allows no occurrence of
system timing error. The optimal setting should minimize
system EMI to the fullest without affecting system
performance.
The
spreading
is
described
as
a
percentage deviation of the center frequency.
(Note: the center frequency is the frequency of the
external reference input on CLKIN, Pin 1.)
The P2781A is designed for PC peripheral, networking,
notebook PC, and LCD monitor applications. It is
optimized for operation between 3 to 78MHz range. In the
following application schematic example, the P2781A
spread percentage selection is determined by the
external LF value specified in the Loop Filter Selection
Table. The Input Frequency Selection Table specifies the
input frequency range. The external LF allows the user to
fine tune the spread percentage to optimize the EMI
reduction benefits of the spread spectrum.
Note: Both logic input pins FS1 and FS0 have to be connected to either VDD or VSS. Do not leave them floating.
1
2
3
4
8
7
6
5
VDD
FS0
ModOUT
VSS
LF
FS1
XOUT
XIN / CLKIN
P278xA
+3.3V
Modulated 16MHz Clock
To target Chip
16 MHz
0.1F
C2
C1
R1
0 Ohm
2.2 K
相关PDF资料 |
PDF描述 |
|---|---|
| I2784AF-08SR | 312 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2783AG-08SR | OTHER CLOCK GENERATOR, PDSO8 |
| I2784A-08SR | 312 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2781A-08TT | 78 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2781A-08TR | 78 MHz, OTHER CLOCK GENERATOR, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| I2784AF-08TT | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:General Purpose EMI Reduction IC |
| I2784AG-08SR | 制造商:PULSECORE 制造商全称:PulseCore Semiconductor 功能描述:General Purpose EMI Reduction IC |
| I2784AG-08ST | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:General Purpose EMI Reduction IC |
| I2784AG-08TR | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:General Purpose EMI Reduction IC |
| I2784AG-08TT | 制造商:PULSECORE 制造商全称:PulseCore Semiconductor 功能描述:General Purpose EMI Reduction IC |
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