The growing number of convenience and comfort features in vehicles, coupled with the desire to eliminate point-to-point wiring harnesses associated with non-critical features such as wipers, mirrors, climate control and rain sensors, led to the demand for lower-cost alternatives to CAN for sensor and actuator applications. LIN (Local Interconnect Network) was developed to provide a common sensor/actuator bus standard. Initially introduced in 2000 as an inexpensive serial communication bus, the latest version (2.2A) is now standardized as ISO 17987. LIN uses a simple and low-cost single wire physical layer implementation based on ISO 9141 (as used by the K-line onboard diagnostic standard). This single-wire implementation does make LIN more susceptible to EMC than two-wire buses, which in turn limits the data rate to 20 kb/s and the recommended number of nodes to 16.
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