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参数资料
| 型号： | I2040C-08ST |
| 元件分类： | 时钟及定时 |
| 英文描述： | 2040 SERIES, PLL BASED CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8 |
| 封装： | 0.150 INCH, SOIC-8 |
| 文件页数： | 3/9页 |
| 文件大小： | 159K |
| 代理商： | I2040C-08ST |
September 2005
P2040C
rev 1.4
LCD Panel EMI Reduction IC
3 of 9
Notice: The information in this document is subject to change without notice.
Spread Spectrum Selection
Table 1 illustrates the possible spread spectrum options. 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).
Example: P2040C is designed for high resolution flat panel applications and is able to support panel frequencies from 50MHz
to 170MHz. For a 65MHz pixel clock frequency, a spreading selection of MRA=0, SR1=1 and SR0 =1 provides a percentage
deviation of ±1.50% (see Table 1). This result in frequency on ModOUT being swept from 64.03MHz to 65.98MHz at a
modulation rate of 50.77KHz (see Table 1). This particular example (see Figure below) given here is a common EMI reduction
method for notebook LCD panel and has already been implemented by most of the leading OEM and mobile graphic
accelerator manufacturers.
Application Schematic for Mobile LCD Graphics Controllers
`
Modulated 65MHz signal with
±1.5 % deviation and modulation
rate of 50.77KHz. This signal is
connected back to the spread
spectrum input pin (SSIN) of the
graphics accelerator.
1
2
3
4
CLKIN
MRA
SR1
VSS
SR0
5
6
7
8
SSON#
ModOUT
VDD
65MHz from graphics accelerator
+3.3V
0.1F
P2040C
Digital control for the SS enable
or disable
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| I2041AF-8TT | 40.4 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2041A-8ST | 40.4 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2041AF-8ST | 40.4 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2041AG-8TT | 40.4 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2042AF-08ST | 2042 SERIES, PLL BASED CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| I2040C-08TR | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:LCD Panel EMI Reduction IC |
| I2040C-08TT | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:LCD Panel EMI Reduction IC |
| I2040CF-08SR | 制造商:PULSECORE 制造商全称:PulseCore Semiconductor 功能描述:LCD Panel EMI Reduction IC |
| I2040CF-08ST | 制造商:PULSECORE 制造商全称:PulseCore Semiconductor 功能描述:LCD Panel EMI Reduction IC |
| I2040CF-08TR | 制造商:PULSECORE 制造商全称:PulseCore Semiconductor 功能描述:LCD Panel EMI Reduction IC |
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