The Z0109MA 1AA2 part is an optically isolated digital output IC from STMicroelectronics. It is a single-channel device with wide-range input voltage up to 24 VDC and is capable of delivering 10mA. It provides an open-drain output, which is ideal for driving load switching or logic interface. It also offers minimum propagation delay, noise immunity, and UL approval. The part is available in small-sized SMD packages, making it well-suited for space-restricted designs in industrial, consumer and medical applications.