For the LVPECL output, VOH maximum is spec’d as Vcc-0.88, or 2.42V at Vcc=3.3V. VOL minimum is given as VCC-2.02, or 1.28V at Vcc=3.3V. This gives up to 1.14 V swing on each LVPECL output, or up to 2.28 V differential swing. Even if we assume nominal levels for VOH and VOL as midway between the MIN and MAX specs, we get 1.66 V differential swing.
So, what is meant by the specification: |VOD| Differential output voltage? It is specified to be between 610 and 970 mV. Is this intended as the differential peak-peak output swing? If so, it seems at odds with the value that we would compute from the combined VOH and VOL values for the individual outputs.