Toshiba TLP291-4 Quad Optocoupler

The Toshiba TLP291-4 is a high-density quad-channel optocoupler in a compact SOP-16 package. It uses infrared LEDs optically coupled to phototransistors to provide superior electrical isolation between low-voltage logic circuits and high-voltage loads. This protects your microcontroller from noise and voltage spikes. It is widely used in Programmable Logic Controllers (PLCs), switching power supplies, and telecommunication equipment.