Toshiba optical receiver & transmitter modules used for S/P-DIF

TORX173, TOTX173 top view:

    opto
   +----+
  6.    .5
   +....+
    1234

Pin  TORX173     TOTX173
1    out         GND
2    GND         R
3    Vcc         Vcc
4    GND         in
5    case(GND)   case(GND)
6    case(GND)   case(GND)

Vcc  +5V (use 0.1 uF decoupling to GND)
         (use 47 uH choke to connect Pin 3 to Vcc for TORX)
R    8.2 kOhm to Vcc

TORX and TOTX are both high active and are CMOS/TLL logic compatible

check also:
http://www.components.toshiba.com/components/category/Optoelectronics--TOSLINKFiberopticDevices.shtml