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

7.4.6 Unpowered Device

The TCAN942H-Q1 is designed to be passive to the CAN bus if the device is unpowered. The bus pins were designed to have low leakage currents when the device is unpowered, so the pins do not load the bus. This is critical if some nodes of the network are unpowered while the rest of the network remains operational.

The logic pins also have low leakage currents when the device is unpowered so that the pins do not load other powered circuits.