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參數(shù)資料
| 型號(hào)： | P2681A |
| 廠商： | Alliance Semiconductor Corporation |
| 英文描述： | General Purpose EMI Reduction IC |
| 中文描述： | 通用集成電路減少電磁干擾 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大小： | 471K |
| 代理商： | P2681A |
October 2003
rev D
Pin Configuration
P2681A
General Purpose EMI Reduction IC
2 of 10
Notice: The information in this document is subject to change without notice.
Pin Description
Pin#
Pin Name
Type
Description
1
XIN/CLKIN
I
Connect to crystal or clock input.
2
XOUT
I
Crystal output
Digital logic input used to select normal output mode or divide-by-2 output
mode. When this pin is Low, the frequency of the output clock is the same
as the input clock frequency. When it is tied High, the output frequency is
half the input clock frequency. This pin has an internal pull-low resistor.
External Loop Filter for the PLL. By changing the value of the CRC circuit,
the % spread can be adjusted accordingly. See Table 1.2 for detail value.
Ground Connection. Connect to system ground.
3
DIV2
I
4
LF
I
5
VSS
I
6
ModOUT
O
Spread Spectrum Clock Output.
Digital logic input used to select Spreading Range between large or small
for a given LF value (see Table 1.1 and 1.2). When SR0=0, the spreading %
is smaller than SR0=1. This pin has an internal pull-up resistor.
Connect to +3.3V or 5.0V
7
SR0
I
8
VDD
P
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| P2681A-08SR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:General Purpose EMI Reduction IC |
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