The OSK64LS1C1A is a Quad Single-Ended Output Optocoupler, manufactured by Optosupply. It is a 4-channel digital isolator with a phototransistor output, designed for digital isolation and signal conversion between a variety of digital interfaces. This optocoupler has a wide operating temperature range of -40°C to +125°C, making it suitable for a variety of industrial, automotive, and consumer applications. It features a fast propagation delay of only 4µs, low crosstalk, and high common mode transient immunity of up to 50kV/µs.