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MK1449SI PDF预览

MK1449SI

更新时间: 2024-11-30 22:46:15
品牌 Logo 应用领域
矽成 - ICSI 晶体外围集成电路光电二极管以太网时钟
页数 文件大小 规格书
4页 64K
描述
Sound/SCSI+Fast Ethernet Clock

MK1449SI 数据手册

 浏览型号MK1449SI的Datasheet PDF文件第2页浏览型号MK1449SI的Datasheet PDF文件第3页浏览型号MK1449SI的Datasheet PDF文件第4页 
MK1449B  
Sound/SCSI+Fast Ethernet Clock  
Description  
Features  
• Packaged as 8 pin SOIC  
The MK1449B is the most cost effective way to  
generate high quality, high frequency clock  
outputs for SCSI plus Fast Ethernet devices, or  
AC97 sound chips. Using Phase-Locked-Loop  
(PLL) techniques, the device uses a standard  
fundamental mode, inexpensive 14.31818 MHz  
crystal or clock to produce two output clocks.  
• For Fast Ethernet plus SCSI on computer  
motherboards  
• For AC97 sound on computer motherboards  
• Less than 1 ppm synthesis error  
• Input crystal frequency of 14.31818 MHz  
• Operating voltages of 3.0 to 5.5V  
• Available in industrial temperature  
• Full CMOS level outputs with 25mA drive  
capability at TTL levels  
The device can accept either a crystal or clock  
input. Also on the chip is the ability to generate a  
1.25x clock of the reference plus the reference,  
making it possible to generate 20 and 25 MHz  
clocks from a 20 MHz crystal.  
• Ideal for oscillator replacement  
• Advanced, low power CMOS process  
Block Diagram  
VDD GND  
2
Output  
S1, S0  
CLK1  
Buffer  
PLL  
Clock  
Synthesis  
and Control  
Circuitry  
14.31818MHz  
crystal  
or clock  
X1  
Output  
CLK2  
Buffer  
Crystal  
Oscillator  
X2  
MDS 1449B C  
1
Revision 120799  
Printed 11/15/00  
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408)295-9800tel • www.icst.com  

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