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ASM2I99447 PDF预览

ASM2I99447

更新时间: 2024-01-25 17:29:57
品牌 Logo 应用领域
ALSC 时钟
页数 文件大小 规格书
14页 563K
描述
3.3V/2.5V 1:9 LVCMOS Clock Fanout Buffer

ASM2I99447 数据手册

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May 2005  
rev 0.3  
ASM2I99447  
3.3V/2.5V 1:9 LVCMOS Clock Fanout Buffer  
Features  
ASM2I99447 is specifically designed to distribute LVCMOS  
compatible clock signals up to a frequency of 350 MHz.  
Each output provides a precise copy of the input signal with  
a near zero skew. The outputs buffers support driving of  
50terminated transmission lines on the incident edge:  
each is capable of driving either one parallel terminated or  
two series terminated transmission lines.  
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9 LVCMOS Compatible Clock Outputs  
2 Selectable, LVCMOS Compatible Inputs  
Maximum Clock Frequency of 350 MHz  
Maximum Clock Skew of 150 pS  
Synchronous Output Stop in Logic Low State  
Eliminates Output Runt Pulses  
Two selectable independent LVCMOS compatible clock  
inputs are available, providing support of redundant clock  
source systems. The ASM2I99447 CLK_STOP control is  
synchronous to the falling edge of the input clock. It allows  
the start and stop of the output clock signal only in a logic  
low state, thus eliminating potential output runt pulses.  
Applying the OE control will force the outputs into high  
impedance mode.  
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High–Impedance Output Control  
3.3V or 2.5V Power Supply  
Drives up to 18 Series Terminated Clock Lines  
Ambient Temperature Range –40°C to +85°C  
32 Lead LQFP and TQFP Packaging  
Supports Clock Distribution in Networking,  
Telecommunications and Computer Applications  
Pin and Function Compatible to MPC947 and  
MPC9447  
All inputs have an internal pull–up or pull–down resistor  
preventing unused and open inputs from floating. The  
device supports a 2.5V or 3.3V power supply and an  
ambient temperature range of –40°C to +85°C. The  
ASM2I99447 is pin and function compatible but  
performance enhanced to the MPC947 and MPC9447.  
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Functional Description  
The ASM2I99447 is a 3.3V or 2.5V compatible, 1:9 clock  
fanout buffer targeted for high performance clock tree  
applications. With output frequencies up to 350 MHz and  
output skews less than 150 pS, the device meets the needs  
of most demanding clock applications.  
Alliance Semiconductor  
2575, Augustine Drive Santa Clara, CA Tel: 408.855.4900 Fax: 408.855.4999 www.alsc.com  
Notice: The information in this document is subject to change without notice.  

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