SLVSM19 July   2026 TCAN942H-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 System-Level Transient and ESD Ratings
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Characteristics
    6. 6.6 Supply Characteristics
    7. 6.7 Dissipation Ratings
    8. 6.8 Electrical Characteristics
    9. 6.9 Switching Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Detailed Pin Description
      1. 7.3.1 TXD
      2. 7.3.2 GND
      3. 7.3.3 VCC
      4. 7.3.4 RXD
      5. 7.3.5 VIO (only for TCAN942HV-Q1)
      6. 7.3.6 CANH and CANL
      7. 7.3.7 STB (Standby)
    4. 7.4 Feature Description
      1. 7.4.1 CAN Bus States
      2. 7.4.2 TXD Dominant Timeout (DTO)
      3. 7.4.3 CAN Bus Short-Circuit Tolerance
      4. 7.4.4 Thermal Shutdown (TSD)
      5. 7.4.5 Undervoltage Lockout
      6. 7.4.6 Unpowered Device
      7. 7.4.7 Floating Pins
    5. 7.5 Device Functional Modes
      1. 7.5.1 Operating Modes
      2. 7.5.2 Normal Mode
      3. 7.5.3 Standby Mode
        1. 7.5.3.1 Remote Wake Request Using Wake-Up Pattern (WUP) in Standby Mode
      4. 7.5.4 Driver and Receiver Function
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.1 Overview

The TCAN942H-Q1 devices meet or exceed the specifications of the ISO 11898-2 Controller Area Network (CAN) physical layer standard. The devices support both CAN and CAN FD at data rates up to 8Mbps, allowing for high-performance multipoint communication across various network topologies. This generation of transceivers is designed with enhanced functionality to provide system-level robustness against short-circuit and ground-loss faults in higher-voltage environments, such as battery electric vehicles or automobiles with 48V battery supplies.

In CAN networks, common mode chokes (CMCs) can cause high voltage transients due to inductive flyback in system-level short-circuit conditions which may greatly exceed the maximum ratings of the transceiver. The TCAN942H-Q1 is designed to handle these fault events without destroying the device. ECUs using TCAN942H-Q1 can be designed to meet stringent system-level requirements, such as those outlined in ISO 16750, ISO 21780, and ISO/WD 25769.

The TCAN942HV-Q1 has two separate supply input rails: VCC for the 5V CAN bus supply and VIO logic supply for logic-level translation, allowing for connection directly to 3.3V or 5V controllers.