• LIN transceiver (PHY)

LIN Bus

There are several types of networks in cars. The best known, and mostly used is probably CAN (Controller Area network); these networks are designed to allow microcontrollers and devices to communicate with each other in applications without a host computer. LIN (Local Interconnect Network) is a serial network protocol used for communication between components in vehicles. LIN is a lower cost version of CAN, allowing data to be transmitted over a single line. It is typically used for non-safety critical applications, such as (light) sensors, seat positioning motors or even cruise control. As it is connected to the car battery, the supply range is broadly defined (7V-18V). The PHY should be designed to drive a variable load, depending on the number of slaves on the LIN bus. Additionally, the robustness requirements are quite severe; for example, the IC should survive loss of ground or loss of battery, pass high ESD levels and have a well thought out EMC design.
Sofics' LIN transceiver PHY combines all these elements.

  • Sofics' LIN PHY with built-in on-chip robustness against a myriad of automotive disturbances

Adaptable design

Though the LIN specifications are fixed (ISO 17987-4, SAE J2602), some options can be added, both from a functional as well as from a robustness point of view. For example, for functionality, options for mode control include:
  • Enable, disable, sleep, power down, ready, receiver only…
  • Low emission v/s fast switching mode options
  • Power saving options
  • ...
LIN PHY's need to comply to high ESD (e.g. 6kV HBM) and system level ESD (e.g. 6kV or 8kV ISO 10605/IEC 61000-4-2). In the Sofics design this is augmented by:
  • Predictable and high EMC
    • Limited EM emission: Slew-rate control (slope control) (IEC 61967-4)
    • Immune for EMI: Remain operational for RF disturbances (IEC 62132)
  • ISO 7637-3 capability with on-chip elements only (no off-chip protection required) (Optional)

  • Flexible design to cover all your requirements

Sofics LIN PHY

Sofics offers a LIN PHY, including:
  • Driver design (receiver and transmitter)
  • EMC optimized (slope control, EMI)
  • Protection for ESD
  • Compatible with automotive disturbances (ISO 7637)
  • ... And of course compliant to LIN standard (ISO 17987)
Digital Logic (Controller) is not included.

Sofics LIN transciever PHY is currenlty designed in TSMC 0.25um BCD GEN II, and readily portable to any other technology.

  • LIN PHY design readily available at your fingertips


Lin Block Diagram