The PS2801-4-F3 is a Transistor Output Optocoupler with 16-PIN SSOP manufactured by Renesas. It is typically used for providing isolation between a signal source and a load, preventing errors caused by noise and EM interference. It consists of a light source, usually an LED, and a detector, typically a phototransistor, which are physically separated by a barrier that allows only light to travel between the two devices. This optocoupler offers high electrical and high optical isolation, with typical CTR values up to 1000%, fast response time of 1µS and high CMR values to 50kV/µs. The optocoupler is available in a 16-pin small outline surface-mount package and is RoHS compliant.