This part is a kind of semiconductor called TOTX111.

Function of this product has FIBER OPTIC TRANSMITTING MODULE.

Manufacturers : Toshiba

Image and pinout :

Some of the text within the PDF file :

TOTX111 FIBER OPTIC TRANSMITTING MODULE TOTX111 FIBER OPTIC TRANSMITTING MODULE FOR APF l Non−connector (connector less) type l Data rate: DC to 6 Mb / s (NRZ code) l Transmission distance: Up to 10 m (With TORX111) l TTL interface Unit: mm 1. Maximum Ratings (Ta = 25°C) Characteristics Storage Temperature Operating Temperature Supply Voltage Input Voltage Clamped Fiber Bearable Force Soldering Temperature Symbol Tstg Topr VCC VIN FCB Tsol Rating −40 to 85 −20 to 70 −0.5 to 7 −0.5 to VCC + 0.5 19.6 (Note 1) 260 (Note 2) Unit °C °C V V N °C Note 1: Pulling in the axial direction. Momentary value. Note 2: Soldering time ≤ 3 s (More than 1 mm apart from the package). Handling precaution: The LEDs used in this product contain GaAs (Gallium Arsenide). Care must be taken to pr [ ... ]

TOTX111 PDF Datasheet Download