Hi Andrew,Series termination
what the series resistance does is match the line impedance to the driver impedance,
so the signal is launched, and is only at half volts till it hits the end, where its now reflected to make full voltage.
The effect is to slow the edge,
Now if you drive say two loads, off one resistor, then one is going to not be at the end,
so its going to initially see half volts,
In reality, if two loads are "close" then its generally Ok, but what means close depends upon the edge speed you want.
another option, is to use two series resistors in parallel, each sending to its own line / load.
But generally, keep one load on each output
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by Jake Hertz
by Jake Hertz