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IMISG509XB

更新时间: 2024-11-20 23:58:39
品牌 Logo 应用领域
其他 - ETC 时钟发生器
页数 文件大小 规格书
7页 78K
描述
Miscellaneous Clock Generator

IMISG509XB 数据手册

 浏览型号IMISG509XB的Datasheet PDF文件第2页浏览型号IMISG509XB的Datasheet PDF文件第3页浏览型号IMISG509XB的Datasheet PDF文件第4页浏览型号IMISG509XB的Datasheet PDF文件第5页浏览型号IMISG509XB的Datasheet PDF文件第6页浏览型号IMISG509XB的Datasheet PDF文件第7页 
IMISG509  
REDUCED EMI CLOCK CHIP  
April 1996  
CMOS LSI  
SPECTRUM SPREAD CLOCK GENERATOR  
PRODUCT FEATURES  
PRODUCT DESCRIPTION  
þ
Generates CPU clock signals for microprocessor  
systems  
The IMISG509 is a spectrum spread clock generator  
specially designed for personal computers, laser  
printers and other digital systems. IMISG509 uses a  
patented concept to generate popular clock frequencies  
that are intentionally broadbanded to reduce  
electromagnetic interference. The radiated emissions,  
associated with either the clock, harmonics or any  
signals derived from the clock, nominally reduced by  
10 dB and could significantly reduce the cost of  
complying with the regulatory requirements.  
þ
þ
þ
þ
Reduces measured EMI by 10 dB nominal  
4V to 6V operating supply range  
Supports CPUs from all major manufacturers.  
Wide range of selectable output frequencies  
including 60, 50, 48, 40, 33.3, 16.7  
þ
Single, low-cost crystal used as reference  
frequency  
PRCLK is the broadbanded output and can be  
programmed by the PRCLK Frequency Selection Table  
on Page 2. A single, low cost external crystal is  
required as reference frequency for the synthesizer.  
The output modulation function can be disabled when  
the SSON pin is high.  
þ
þ
þ
Glitch-free switching  
50% duty cycle  
TTL or CMOS compatible outputs with 6 mA drive  
capability  
þ
þ
Low, short and long-term jitter  
16 pin P-DIP and 16 Pin SOIC (300 mil body)  
package options  
CONNECTION DIAGRAM  
VDD  
OSCin  
OSCout  
VSS  
MPSEL  
AVDD  
S0  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
S3  
VDD  
BLOCK DIAGRAM  
MPCLK  
VSS  
PRCLK  
AVSS  
LF1  
3
14  
/4 OR /12  
REF  
44.2 MHz  
MPCLK  
2
5
S1  
SSON  
MPSEL  
LF  
10  
7
8
S0  
S1  
SPECTRUM  
SPREAD  
12  
/2  
PRCLK  
16  
9
CLOCK GEN  
S3  
APPLICATIONS  
SSON  
IMISG509 eliminates the need for multiple oscillators  
and generates the CPU clock signals for personal  
computers, laser printers and other digital systems.  
Supports CPUs from all major manufacturers.  
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.  
MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571  
Page 1 of 7  

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