UARTs, or Universal Asynchronous Receiver/Transmitters, are not a specific brand but a type of hardware component used in serial communication. They are commonly integrated into microcontrollers or available as standalone ICs from various manufacturers worldwide, including companies like Texas Instruments (USA), NXP Semiconductors (Netherlands), and STMicroelectronics (Switzerland/France). UARTs serve industries such as industrial automation, telecommunications, and consumer electronics, facilitating data exchange between devices via serial protocols. Key products include UART ICs, modules, and development tools, enabling reliable asynchronous communication in embedded systems.