TOSHIBA PHOTOCOUPLER IRED & PHOTO-IC TLP2166A TLP2166A Plasma Display Panels (PDPs) High-Speed Interfaces 3.3-V Voltage Source Unit: mm The Toshiba TLP2166A consists of an infrared emitting diode and an integrated high-gain, high-speed photodetector. The TLP2166A is housed in the 8-pin SO package. Since the TLP2166A contains two photocouplers, it saves board space. The TLP2166A operates with a 3.3-V supply voltage. Inverting logic output (totem-pole output) SO8 package Gua.