LIN Overview

Local Interconnect Network (LIN) is a low-cost serial communications protocol implemented mostly in automotive networks. It is typically used for mechatronic sub-nodes in automobiles (sensors, actuators), but is also well suited for industrial applications.

The following figure shows an example of an automotive communications architecture with a central gateway. Here, LIN controls the damper motors of the air conditioning system. The LIN specification denotes a LIN sub bus as a LIN Cluster:


Key Features

  • Master-Slave medium access control concept
  • Low-cost silicon implementation based on common UART/SCI interface hardware, an equivalent in software or as a pure state machine.
  • Self-synchronization without a quartz or ceramics resonator in the slave nodes
  • Deterministic signal transmission with signal propagation time computable in advance
  • Low cost, single-wire implementation
  • Speed up to 20 kbit/s
  • "Signal" based application interaction
  • Predictable behavior
  • Reconfigurability
  • Transport layer and diagnostic support

There are a variety of LIN node configuration possibilities, however, all nodes contain a LIN Transceiver, a Universal Asynchronous Receiver Transmitter (UART) Module and an Application Controller (MCU) as shown:


Microchip offers a variety of LIN Transceivers and MCUs with LIN-Enhanced UARTs to enable these common LIN node configurations.

Table of Contents

© 2024 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.