The 6N139(SL)(T1) Optocoupler with SOP-8 RoHS is a high-speed, high-isolation, photocoupler manufactured by CT Micro International. It's a quad-channel, light-activated electronic switch that combines two independent transfer elements: an infrared light emitting diode (LED) and a phototransistor. It is designed for use in industrial applications such as signal isolation, PWM control, and switching among different electrical circuits. This optocoupler has a high transfer rate of up to 10 Mbps and can switch between two distinct logic levels. The operating supply voltage is 5.0V, while the supply current is 5mA. The package of the 6N139(SL)(T1) optocoupler is RoHS compliant, meaning it is free of hazardous substances.