Slew Rate/Rise Time Conversion

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matthej

Joined Oct 10, 2020
61
I just wanted to confirm that my oscillator will drive my circuit correctly. I am focused on rise time vs slew rate in this calculation.

The receiver which runs off 1.8V has a slew rate of 1V/ns which is measured from .35(1.8V) to .65(1.8V).

The clock driver has a rise and fall time spec of 1.1ns from 10% of 1.8V (.18V) to 90% of 1.8V (1.62V)

So if I just do: 1V/ns = (1.62-.18)/x, I get a time of 1.44ns which will meet my 1.1ns rise time of the oscillator? Is this correct?Screenshot 2022-04-02 155947.png
 

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MrChips

Joined Oct 2, 2009
26,489
In order to give you a qualified answer more information is needed.

What is the oscillator?
What is the oscillator driving?
What is the frequency of oscillation?

A circuit schematic would be most helpful.
 
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