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SK100E111

Semtech Corporation
Part Number SK100E111
Manufacturer Semtech Corporation
Description 1:9 Differential Clock Driver
Published Apr 8, 2005
Detailed Description SK10/100E111 HIGH-PER.ORMANCE PRODUCTS PRODUCTS HIGH-PER.ORMANCE Description The SK10E/100E111 is a low skew 1-to-9 diff...
Datasheet PDF File SK100E111 PDF File

SK100E111
SK100E111

Overview
SK10/100E111 HIGH-PER.
ORMANCE PRODUCTS PRODUCTS HIGH-PER.
ORMANCE Description The SK10E/100E111 is a low skew 1-to-9 differential driver designed with clock distribution in mind.
It accepts one signal input which can be either differential or singleended if the VBB output is used.
The signal is fanned out to 9 identical differential outputs.
An enable input is also provided.
A HIGH disables the device by forcing all Q outputs LOW and all Q* outputs HIGH.
The device is specifically designed, modeled, and produced with low skew as the key goal.
Optimal design and layout serve to minimize gate-to-gate skew withindevice, and characterization is used to determine process control limits that ensure consistent tpd distributions from lot to 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 into 50Ω , 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 (i.
e.
sharing the same VCCO) 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.
1:9 Differential Clock Driver .
eatures • • • • • • • • • • • PRELIMINARY Low Skew Guaranteed Skew Spec Differential Design VBB Output Enable Input Extended 100E VEE Range of –4.
2 to –5.
5V 75KΩ Internal Input Pulldown Resistors Fully Compatible with MC10E111 and MC100E111 Specified Over Industrial Temperature Range: –40 oC to 85oC ESD Protection of >4000V Available in 28-pin PLCC Package .
unctional Block Diagram Q0 Q0* Q1 Q1* Q2 Q2* Q3 Q3* Q4 Q4* IN IN* Q5 Q5* Q6 Q6* Q7 Q7* ...


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