TLP181GB-S with Optocouplers SOP-4 RoHS by Youtai is an optoelectronic device that uses an optically coupled LED and a phototransistor to provide high isolation between the input and output circuits. This device comes in a 4-pin SOP package and meets RoHS requirements for environmental protection. This part offers high common-mode transient immunity, high off-state resistance, low collector-emitter saturation voltage, and wide operating temperature range. It is suitable for a variety of works in isolating and switching circuits such as current switching, high voltage level shifting, and signal transmission.