• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 34 subscribers
  • Views 379 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TLIN1021A-Q1: MCU I/O protection

Wei Xiao
Intellectual 615 points

Part Number: TLIN1021A-Q1
Other Parts Discussed in Thread: ESD1LIN24-Q1, ESD761-Q1, ESD2CAN24-Q1

Tool/software:

We use TLIN1021ADRQ1 in one of our automotive boards. One customer reported loss of related functionality after changing car battery. We then determined that the MCU was damaged at the I/O pins connected to the TLIN1021ADRQ1. In this case, ESD protection device added to the design can avoid such issues? If yes, it should be added to the MCU I/O pins or at the Lin input near the connector?

  • +1
    TI__Guru 70607 points

    Hi Wei,

    Yes, you may add ESD protection on LIN (we typically recommend ESD1LIN24-Q1) as close as possible to the external entry point / connector as this should be the primary place to stop the high energy pulse before it couples into the PCB and reach the MCU. Secondary / optional protection can also be included at the MCU's I/O if long / unshielded traces are present, thanks.

    Best Regards,

    Michael.

  • 0 in reply to Michael Ikwuyum
    Intellectual 615 points

    Thank you for the information. Can I use ESD761-Q1 for LIN, CAN, and MCU GPIO protection to reduce BOM size?

  • 0 in reply to Wei Xiao
    TI__Guru 70607 points

    Hi Wei,

    You can if the system is okay with its' lower surge / ESD ratings.

    Hence, ESD761-Q1 seems okay for MCU GPIO. However, further note that it may be less robust for harsh automotive environment / vehicle connectors and would recommend ESD1LIN24-Q1 for LIN instead.

    For CAN, dual channel ESD is recommended and would suggest ESD2CAN24-Q1 as ESD761-Q1 seems to actually increase BOM count and routing complexities, thanks.

    Best Regards,

    Michael.