TOSHIBA PHOTOCOUPLER IRLED & PHOTO-IC TLX9378 TLX9378 HEV (Hybrid Electric Vehicle) and EV (Electric Vehicle) Applications Unit: mm The Toshiba TLX9378 consists of an infrared LED and integrated high gain, high-speed photodetector. The TLX9378 is housed in the SO6 package. The output stage is an open collector type. The photodetector has an internal Faraday shield that provides a guaranteed common-mode transient immunity of 15 kV/μs. TLX9378 guarantees minimum and maximum of propagation del.