Hello Support team,
According to Figure 12 in datasheet p14, we can define VTH/VTL as differential voltage range level.

VTH defines as +90mV@max, VTL does as -90mV@min in CML RECEIVER DC SPECIFICATIONS (RIN+, RIN-) in p.8.

I guess each voltage level from GND may define by making center level as VCM below.
VTH voltage level@min = VCM + 90mV
VTL voltage level@max = VCM - 90mV
So, I'm understanding that VIN will define 180mV@min as the differential range.
My understanding is correct?
Best Regards,
Hirokazu Takahashi