I am analyzing signal integrity between an applications processor and DDR3 modules.I was looking at IBIS models for the device I am using. I was confused because certain IBIS models had "driver impedance" and certain ones had "ODT" - (on-die termination)

In that context, would anyone be able to outline the difference between termination impedance and driver impedance?



1 Answer 1


The data signals on this interface are bi-directional. It means that the same pins are receivers and transmitters. On-die termination refers to impedance in receiver mode, while driver impedance is when the circuit switches into driver mode and drives the signal.


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