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MC10E411 PDF预览

MC10E411

更新时间: 2024-11-17 22:58:07
品牌 Logo 应用领域
安森美 - ONSEMI 时钟
页数 文件大小 规格书
6页 131K
描述
1:9 DIFFERENTIAL ECL/PECL RAMBUS CLOCK BUFFER

MC10E411 数据手册

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SEMICONDUCTOR TECHNICAL DATA  
The MC10E411 is a low skew 1-to-9 differential driver, designed with  
clock distribution in mind. The MC10E411’s function and performance are  
similar to the popular MC10E111, with the added feature of 1.2V output  
swings. It accepts one signal input, which can be either differential or  
single-ended if the V  
identical differential outputs.  
output is used. The signal is fanned out to 9  
BB  
1:9 DIFFERENTIAL  
ECL/PECL RAMBUS  
CLOCK BUFFER  
200ps Part-to-Part Skew  
50ps Output-to-Output Skew  
Differential Design  
V  
Output  
BB  
Voltage Compensated Outputs  
V Range of –4.5 to –5.5V  
EE  
75kInput Pulldown Resistors  
The output voltage swing of the E411 is larger than a standard ECL  
swing. The 1.2V output swings provide a signal which can be AC coupled  
into RAMBus compatible input loads. The larger output swings are  
produced by lowering the V  
of the device. With the exception of the  
OL  
lower V , the E411 is identical to the MC10E111. Note that the larger  
OL  
output swings eliminate the possibility of temperature compensated  
outputs, thus the E411 is only available in the 10E style of ECL. In  
FN SUFFIX  
PLASTIC PACKAGE  
CASE 776-02  
addition, because the V  
be terminated to –2.0V. This datasheet provides a few termination  
alternatives.  
is lower than standard ECL, the outputs cannot  
OL  
The E411 is specifically designed, modeled and produced with low  
skew as the key goal. Optimal design and layout serve to minimize gate to  
gate skew within a device, and empirical modeling is used to determine  
process control limits that ensure consistent t distributions from lot to  
pd  
lot. The net result is a dependable, guaranteed low skew device.  
To ensure that the tight skew specification is met it is necessary that both sides of the differential output are terminated, even if  
only one side is being used. In most applications, all nine differential pairs will be used and therefore terminated. In the case  
where fewer than nine pairs are used, it is necessary to terminate at least the output pairs on the same package side as the  
pair(s) being used on that side, in order to maintain minimum skew. Failure to do this will result in small degradations of  
propagation delay (on the order of 10–20ps) of the output(s) being used which, while not being catastrophic to most designs, will  
mean a loss of skew margin.  
The MC10E411, as with most other ECL devices, can be operated from a positive V  
supply in PECL mode. This allows the  
CC  
E411 to be used for high performance clock distribution in +5.0V systems. Designers can take advantage of the E411’s  
performance to distribute low skew clocks across the backplane or the board. In a PECL environment, series or Thevenin line  
terminations are typically used as they require no additional power supplies. For more information on using PECL, designers  
should refer to Motorola Application Note AN1406/D.  
11/95  
REV 1  
Motorola, Inc. 1996  

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