Connecting Toslink TORX179L optical receiver directly to S/PDIF coaxial input
The schematic shows a TORX173/176 which is confusing.

It also makes it look like the TORX modules have more than 3 pins yet these modules have only 3 pins: vdd, data and gnd, also confusing !

I believe the TORX modules already have some inverter like circuits build-in so adding inverters (the 74HCU04) seems somewhat pointless to me.

I build such a thing once, I did not include the inverters but I did include a 100 nF capacitor (using 3 x 47 nF is silly) and the resistive divider. As long as you do not have a very long Coax cable between this circuit and the SPDIF input, I expect this to work fine. Mine did anyway :-)