Open-Collector Outputs In Microcontrollers Explained

With microcontrollers, communications protocols, timers, and other devices, you'll sometimes hear that the outputs are "open-collector outputs," which may be confusing. In this overview, Josh reviews bipolar junction transistors (BJTs) and how BJTs are used inside microcontrollers and other devices to create open-collector outputs. Besides how they are used, he explains why you want an open collector output with some microcontrollers. Once you understand how an open-collector output works, it'll make sense why I2C communication lines use open-collector outputs to control common lines between multiple devices. We also recommend checking out the written tutorial on CircuitBread.com at https://www.circuitbread.com/tutorial... 0:00 Introduction 0:26 Review of Bipolar Junction Transistors (BJTs) 1:00 BJT internal to the device 1:49 MOSFETs and open-drain outputs 2:47 Trade-offs of open-collector or open-drain outputs 4:00 Check out our Friends of CircuitBread 4:18 What else is there on CircuitBread.com? For electronics tools, tutorials, equations and more check out our site: https://www.circuitbread.com And check out our Friends of CircuitBread, who offer special discounts, product samples, resources and more to our users: https://www.circuitbread.com/friends CircuitBread is joining the fight to help people more easily learn about and use electronics. With an ever-growing array of equations, tools, and tutorials, we're striving for the best ways to make electronics and electrical engineering topics more accessible to everyone. Connect with CircuitBread: Discord ➤   / discord   Instagram ➤   / circuitbread   Facebook ➤   / circuitbread   Twitter ➤   / circuitbread