Using the ULN2003A Transistor Array with Arduino - YouTube
300 Series Low-Noise Matched Transistor Array ICs - THAT | Mouser
Can I use a CA3081 NPN transistor array instead of a bunch of 2N3904 transistors to drive a bunch of MOSFETs? - Electrical Engineering Stack Exchange
The standard ULN2003A darlington transistor array for the 28byj-48 stepper motor only uses 4 pins of the seven available on the ULN2003A can I use two ULN2003A to drive three stepper motors?
Electronic Integrated Circuits ( ICs ): TRANSISTOR IC ARRAY