This part is a kind of semiconductor called TLP105.

Function of this product has PHOTOCOUPLER IRED & PHOTO-IC.

Manufacturers : Toshiba

Image and pinout :

Some of the text within the PDF file :

TLP105 TOSHIBA PHOTOCOUPLER GaAℓAs IRED & PHOTO-IC TLP105 Isolated bus drivers High-speed line receivers Microprocessor system interfaces Unit in mm The Toshiba TLP105 consists of a GaAℓAs light emitting diode optically coupled to a high-gain, high-speed photodetector. The TLP105 is housed in a 6-pin MFSOP. With a totem-pole output, the TLP105 is capable of both sinking and sourcing current. The TLP105 has an internal Faraday shield, which provides a guaranteed common-mode transient immunity of ±10 kV/μs. The TLP105 has a noninverting output. An inverting-output version, the TLP108, is also available. JEDEC ― TOSHIBA 11-4C2 Weight: 0.09 g (typ.) z z z z z z z Buffer logic type (totem-pole output) Guaranteed Performance Over Temperature: -40 to 100°C Power Supply Voltage: 4.5 t [ ... ]

TLP105 PDF Datasheet Download