LMK05318B: How can I apply single-ended LVCMOS clock signal to reference input port (PRIREF or SECREF)?

Hi,

I want to put a 3.3V LVCMOS clock into the reference input port (PRIREF or SECREF). Page 30 of the datasheet shows the recommended input interface as shown below.

If I apply a 3.3V LVCMOS clock to REF_P using only one serial resistor (Rs) as shown in the figure above, what should I do with the rest of the REF_N pin?

And what value do you usually recommend for the Rs resistor?

Thanks.