SDAA537 October   2026 TCAN2845-Q1 , TCAN2847-Q1 , TCAN2855-Q1 , TCAN2857-Q1 , TCAN2947-Q1 , TCAN2957-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Detailed Description
    1. 2.1  Overview
    2. 2.2  Functional Safety
    3. 2.3  CAN Transceiver
    4. 2.4  LDOs
    5. 2.5  State Machine
    6. 2.6  Watchdog
    7. 2.7  SW Pin
    8. 2.8  High-Side Switches (HSSs)
    9. 2.9  WAKE Pins
    10. 2.10 Long Duration Timer and Cyclic Wake
    11. 2.11 Register Map
  6. 3Summary
  7. 4References

2.3 CAN Transceiver

Both SBC families include a CAN-FD or CAN-FD SIC transceiver that supports data rates up to 8Mbps. However, TCAN29xx-Q1 does not offer any variants that support partial networking/selective wake, unlike devices such as TCAN2845-Q1.

Design Consideration: If the system you are designing requires partial networking, consider adding a separate partial networking CAN transceiver such as TCAN1575-Q1 to the ECU to enable this capability. See the following figure for details.

TCAN29xx-Q1 Partial Networking Design Example Figure 2-1 TCAN29xx-Q1 Partial Networking Design Example

TCAN29xx-Q1 has a lower fault tolerance on the CANH and CANL pins compared to TCAN28xx-Q1 (40V vs 58V). This also applies to the LIN transceiver as well.

Design Consideration: If your system is prone to overvoltage on the CAN/LIN bus that exceeds 40V, considering shortening the cable length or adding clamping circuitry on the CANH and CANL and/or LIN pins to reduce the voltage seen by the device to not violate the pin ratings.

While TCAN28xx-Q1 detected a variety of CAN bus faults such as an open bus or short-to-ground, the TCAN29xx-Q1 will only detect "short" faults on the CAN bus (short-to-ground, short-to-battery, and so on.).

Design Consideration: If you were relying on TCAN28xx-Q1 to detect non-short faults, this needs to be done externally when using TCAN29xx-Q1.