The ULN2003D1013TR is a Darlington transistor array from STMicroelectronics that is used as an output driver for TTL- and CMOS-compatible logic signals. It features a maximum output current of 0.5 A and can support voltages up to 50V. The package consists of an array of seven NPN darlington transistors, including integrated flyback diodes. The part is packaged in a SO16 plastic surface-mount package and is designed for use in applications such as controlling lamps, relays, or data displays.