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Re: SSM2603 doesn't work at low temp

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Hello Yuriy,

 

I have done a signal integrity analysis. It basically looks really good with just the single series resistors. The 33 ohm looked pretty good but the SCL line had a bit more overshoot. So 49 ohms ended up working well. Since it is important to try to treat both signals the same I would use 49 ohms for both series resistors. R15 and R16.

 

The worst overshoot or undershoot I got was just a few millivolts so that will work out really well. It will be interesting to see if this fixes it without adding any capacitance.

 

I have attached some screenshots.

 

Let me know how it goes.

 

Dave T


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