SLLSFJ3C February   2021  – December 2021 TCAN1044A-Q1 , TCAN1044AV-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  ESD Ratings - IEC Specifications
    4. 7.4  Recommended Operating Conditions
    5. 7.5  Thermal Characteristics
    6. 7.6  Supply Characteristics
    7. 7.7  Dissipation Ratings
    8. 7.8  Electrical Characteristics
    9. 7.9  Switching Characteristics
    10. 7.10 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Pin Description
        1. 9.3.1.1 TXD
        2. 9.3.1.2 GND
        3. 9.3.1.3 VCC
        4. 9.3.1.4 RXD
        5. 9.3.1.5 VIO
        6. 9.3.1.6 CANH and CANL
        7. 9.3.1.7 STB (Standby)
      2. 9.3.2 CAN Bus States
      3. 9.3.3 TXD Dominant Timeout (DTO)
      4. 9.3.4 CAN Bus short-circuit current limiting
      5. 9.3.5 Thermal Shutdown (TSD)
      6. 9.3.6 Undervoltage Lockout
      7. 9.3.7 Unpowered Device
      8. 9.3.8 Floating pins
    4. 9.4 Device Functional Modes
      1. 9.4.1 Operating Modes
      2. 9.4.2 Normal Mode
      3. 9.4.3 Standby Mode
        1. 9.4.3.1 Remote Wake Request via Wake-Up Pattern (WUP) in Standby Mode
      4. 9.4.4 Driver and Receiver Function
  10. 10Application Information Disclaimer
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
        1. 10.2.1.1 CAN Termination
      2. 10.2.2 Detailed Design Procedures
        1. 10.2.2.1 Bus Loading, Length and Number of Nodes
    3. 10.3 System Examples
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Receiving Notification of Documentation Updates
    2. 13.2 Support Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.3.6 Undervoltage Lockout

The supply pins, VCC and VIO, have undervoltage detection that places the device into a protected state. This protects the bus during an undervoltage event on either supply pin.

Table 9-1 Undervoltage Lockout - TCAN1044A-Q1
VCCDEVICE STATEBUSRXD PIN
> UVVCCNormalPer TXDMirrors bus
< UVVCCProtectedHigh impedance High impedance
Table 9-2 Undervoltage Lockout - TCAN1044AV-Q1
VCCVIODEVICE STATEBUSRXD PIN
> UVVCC> UVVIONormalPer TXDMirrors bus
< UVVCC > UVVIO STB = High: Standby Mode Weak biased to GND VIO: Remote wake request
See Section 9.4.3.1
STB =Low: Protected Mode High impedance Recessive
> UVVCC< UVVIOProtectedHigh impedance High impedance
< UVVCC< UVVIOProtected High impedanceHigh impedance

Once the undervoltage condition is cleared and tMODE has expired the TCAN1044A-Q1 will transition to normal mode and the host controller can send and receive CAN traffic again