SLLSF83B May   2021  – July 2025 TCAN11623-Q1 , TCAN11625-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configurations and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 ESD Ratings IEC Specification
    4. 5.4 Recomended Operating Conditions
    5. 5.5 Thermal Information
    6. 5.6 Power Supply Characteristics
    7. 5.7 Electrical Characteristics
    8. 5.8 Switching Characteristics
    9. 5.9 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  VSUP Pin
      2. 7.3.2  VCCOUT Pin
      3. 7.3.3  VFLT Pin
      4. 7.3.4  VLDO3 Pin
      5. 7.3.5  Digital Inputs and Outputs
      6. 7.3.6  Digital Control and Timing
      7. 7.3.7  VIO Pin
      8. 7.3.8  GND
      9. 7.3.9  INH Pin
      10. 7.3.10 WAKE Pin
      11. 7.3.11 nRST Pin
      12. 7.3.12 CAN Bus Pins
      13. 7.3.13 Local Faults
        1. 7.3.13.1 TXD Dominant Timeout (TXD DTO)
        2. 7.3.13.2 Thermal Shutdown (TSD)
        3. 7.3.13.3 Under/Over Voltage Lockout
        4. 7.3.13.4 Unpowered Devices
        5. 7.3.13.5 Floating Terminals
        6. 7.3.13.6 CAN Bus Short Circuit Current Limiting
        7. 7.3.13.7 Sleep Wake Error Timer
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operating Mode Description
        1. 7.4.1.1 Normal Mode
        2. 7.4.1.2 Standby Mode
        3. 7.4.1.3 Sleep Mode
          1. 7.4.1.3.1 Remote Wake Request via Wake-Up Pattern (WUP)
          2. 7.4.1.3.2 Local Wake-Up (LWU) via WAKE Input Terminal
        4. 7.4.1.4 Reset Mode
        5. 7.4.1.5 Fail-safe Mode
      2. 7.4.2 CAN Transceiver
        1. 7.4.2.1 CAN Transceiver Operation
        2. 7.4.2.2 CAN Transceiver Modes
          1. 7.4.2.2.1 CAN Off Mode
          2. 7.4.2.2.2 CAN Autonomous: Inactive and Active
          3. 7.4.2.2.3 CAN Active
        3. 7.4.2.3 Driver and Receiver Function Tables
        4. 7.4.2.4 CAN Bus States
  9. 8 Application Information
    1. 8.1 Application Information Disclaimer
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Bus Loading, Length and Number of Nodes
      2. 8.2.2 Detailed Design Procedures
        1. 8.2.2.1 CAN Termination
    3. 8.3 Application Curves
    4. 8.4 Power Supply Requirements
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.13.5 Floating Terminals

The TCAN1162x-Q1 has internal pull-ups and pull-downs on critical pins to ensure a known operating behavior if the pins are left floating.

The TXD pin is pulled up to VIO which forces a recessive level if the pin floats. This internal bias should not be relied upon by design but rather a fall-safe option. Special care needs to be taken when the device is used with a CAN controller that has open drain outputs. The device implements a weak internal pull-up resistor on the TXD pin. The CAN bit timing for CAN FD data rates will require special consideration and the pull-up strength should be considered carefully when using open drain outputs. An adequate external pull-up resistor must be used to make sure the TXD output of the CAN controller maintains adequate bit timing input to the CAN device.

The nSLP pin is weakly pulled down which forces the device into the low-power sleep mode if the terminal is left floating. See Table 7-2.

Table 7-2 Terminal Fail-Safe Biasing
TERMINALPULL-UP or PULL-DOWNCOMMENT
TXDPull-upWeakly biases TXD toward recessive to prevent bus blockage or TXD DTO triggering
nSLPPull-downWeakly biases the nSLP terminal towards low power sleep mode to prevent excessive system power