SLLSEV0F November   2017  – November 2023 TCAN1043-Q1 , TCAN1043G-Q1 , TCAN1043H-Q1 , TCAN1043HG-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 ESD Ratings IEC Specification
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Dissipation Ratings
    7. 6.7 Electrical Characteristics
    8. 6.8 Switching Characteristics
    9. 6.9 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Internal and External Indicator Flags (nFAULT and RXD)
      2. 8.3.2 Power-Up Flag (PWRON)
      3. 8.3.3 Wake-Up Request Flag (WAKERQ)
      4. 8.3.4 Wake-Up Source Recognition Flag (WAKESR)
      5. 8.3.5 Undervoltage Fault Flags
        1. 8.3.5.1 Undervoltage on VCC Fault
        2. 8.3.5.2 Undervoltage on VIO Fault
        3. 8.3.5.3 Undervoltage on VSUP Fault
      6. 8.3.6 CAN Bus Failure Fault Flag
      7. 8.3.7 Local Faults
        1. 8.3.7.1 TXD Dominant Timeout (TXD DTO)
        2. 8.3.7.2 TXD Shorted to RXD Fault
        3. 8.3.7.3 CAN Bus Dominant Fault
        4. 8.3.7.4 Thermal Shutdown (TSD)
        5. 8.3.7.5 RXD Recessive Fault
        6. 8.3.7.6 Undervoltage Lockout (UVLO)
        7. 8.3.7.7 Unpowered Device
        8. 8.3.7.8 Floating Terminals
        9. 8.3.7.9 CAN Bus Short Circuit Current Limiting
    4. 8.4 Device Functional Modes
      1. 8.4.1 CAN Bus States
      2. 8.4.2 Normal Mode
      3. 8.4.3 Silent Mode
      4. 8.4.4 Standby Mode
      5. 8.4.5 Go-to-Sleep Mode
      6. 8.4.6 Sleep Mode with Remote Wake and Local Wake Up Requests
        1. 8.4.6.1 Remote Wake Request via Wake Up Pattern (WUP)
        2. 8.4.6.2 Local Wake Up (LWU) via WAKE Input Terminal
      7. 8.4.7 Driver and Receiver Function Tables
      8. 8.4.8 Digital Inputs and Outputs
      9. 8.4.9 INH (Inhibit) Output
  10. 9 Application Information Disclaimer
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Bus Loading, Length and Number of Nodes
      2. 9.2.2 Detailed Design Procedures
        1. 9.2.2.1 CAN Termination
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout
        1. 9.4.1.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

8.3.1 Internal and External Indicator Flags (nFAULT and RXD)

The following device status indicator flags are implemented to allow for the MCU to determine the status of the device and the system. In addition to faults, the nFAULT terminal also signals wake up requests and a cold power-up sequence on the VSUP battery terminal so the system can do any diagnostics or cold booting sequence necessary. The RXD terminal indicates wake up request and the faults are multiplexed (ORed) to the nFAULT output.

Table 8-1 Device Status Indicator Flags
EVENTFLAG NAMECAUSEINDICATORS(1)FLAG IS CLEAREDCOMMENT
Power-upPWRONPower up on VSUP and any return of VSUP after it has been below UVVSUPnFAULT = L upon entering Silent mode from Standby, Go-to-Sleep, or Sleep modeAfter transition to normal mode
Wake-up RequestWAKERQ(2)Wake up event on CAN bus, state transition on WAKE pin, or initial power upnFAULT = RXD = L after wake up in standby mode, go-to-sleep mode, and sleep modeAfter transition to normal mode, or either a UVVCC or UVVIO eventWake up request can only be set from standby, Go-to-sleep, or sleep mode. Resets timers for UVVCC or UVVIO
Wake-up Source Recognition(3)WAKESRWake up event on CAN bus, state transition on WAKE pin, initial power upAvailable upon entering normal mode(4) , nFAULT = L indicates wake from WAKE terminal, nFAULT = H indicates wake from CAN busAfter four recessive to dominant edges on TXD in normal mode,leaving normal mode, or either a UVVCC or UVVIO eventA LWU source flag is set on initial power up
Under voltageUVVCCUnder voltage VCCNot externally indicatedVCC returns, or Wake-up request occurs
UVVIOUnder voltage VIONot externally indicatedVIO returns, or Wake-up request occurs
UVVSUPUnder voltage VSUPNot externally indicatedVSUP returnsVSUP undervoltage event triggers the PWRON and WAKERQ flags upon return of VSUP
CAN Bus FailuresCBFCANH shorted to GND, VCC, VSUP or CANL shorted to GND, VCC, VSUPnFAULT = L in Normal mode only(5)Upon leaving Normal mode, or if no CAN bus fault is detected for four consecutive dominant to recessive transitions of the TXD pin while in normal mode.Failure must persist for four consecutive dominant to recessive transitions
Local FaultsTXDDTOTXD Dominant Time Out, dominant (low) signal for t ≥ tTXD_DTOnFAULT = L upon entering Silent mode from Normal modeRXD = L and TXD = H, or upon transitioning into Normal, Standby, Go-to-Sleep, or Sleep modesCAN driver remains disabled until the TXDDTO is cleared
TXDRXDTXD and RXD pins are shorted together for t ≥ tTXD_DTOCAN driver remains disabled until the TXDRXD is cleared
CANDOMCAN bus dominant fault, when dominant bus signal received for t ≥ tBUS_DOMRXD = H, or upon transitioning into Normal, Standby, Go-to-Sleep, or Sleep modesDriver remains enabled
TSDThermal Shutdown, junction temperature ≥ TTSDTJ drops below tTSD and either RXD = L and TXD = H, or upon transitioning into Normal, Standby, Go-to-Sleep, or Sleep modesCAN driver remains disabled until the TSD is cleared
(1) VIO and VSUP are present.
(2) Transitions to Go-to-sleep mode is blocked until WAKERQ flag is cleared.
(3) Wake-up source recognition reflects the first wake up source. If additional wake-up. events occur the source still indicates the original wake up source.
(4) Indicator is only available in normal mode until the flag is cleared.
(5) CAN Bus failure flag is indicated after four recessive-to-dominant edges on TXD.