What is the voltage of the LIN line?

[EloiseFitz]

LIN bus voltage is 12V. The control units controlled by the LIN bus are generally distributed in relatively close proximity, and data transmission is single-wire, with the data line length reaching up to 40m. In the main node, a 1kΩ resistor is configured to terminate the 12V power supply, while in the slave node, a 30kΩ resistor is configured to terminate the 12V power supply. More details are as follows: 1. The LIN bus is a low-cost serial communication network defined for automotive distributed electronic systems, serving as a complement to other automotive multiplex networks such as the Controller Area Network (CAN). It is suitable for applications that do not require high bandwidth, performance, or fault tolerance. 2. The LIN bus is based on the SCI (UART) data format and adopts a single-master/multi-slave mode, which is a special case of UART.