SLLSEV0E November   2017  – March 2021 TCAN1043-Q1 , TCAN1043G-Q1 , TCAN1043H-Q1 , TCAN1043HG-Q1


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (continued)
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 ESD Ratings IEC Specification
    4. 7.4 Recommended Operating Conditions
    5. 7.5 Thermal Information
    6. 7.6 Dissipation Ratings
    7. 7.7 Electrical Characteristics
    8. 7.8 Switching Characteristics
    9. 7.9 Typical Characteristics
  8. Parameter Measurement Information
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Internal and External Indicator Flags (nFAULT and RXD)
      2. 9.3.2 Power-Up Flag (PWRON)
      3. 9.3.3 Wake-Up Request Flag (WAKERQ)
      4. 9.3.4 Wake-Up Source Recognition Flag (WAKESR)
      5. 9.3.5 Undervoltage Fault Flags
        1. Undervoltage on VCC Fault
        2. Undervoltage on VIO Fault
        3. Undervoltage on VSUP Fault
      6. 9.3.6 CAN Bus Failure Fault Flag
      7. 9.3.7 Local Faults
        1. TXD Dominant Timeout (TXD DTO)
        2. TXD Shorted to RXD Fault
        3. CAN Bus Dominant Fault
        4. Thermal Shutdown (TSD)
        5. RXD Recessive Fault
        6. Undervoltage Lockout (UVLO)
        7. Unpowered Device
        8. Floating Terminals
        9. CAN Bus Short Circuit Current Limiting
    4. 9.4 Device Functional Modes
      1. 9.4.1 CAN Bus States
      2. 9.4.2 Normal Mode
      3. 9.4.3 Silent Mode
      4. 9.4.4 Standby Mode
      5. 9.4.5 Go-to-Sleep Mode
      6. 9.4.6 Sleep Mode with Remote Wake and Local Wake Up Requests
        1. Remote Wake Request via Wake Up Pattern (WUP)
        2. Local Wake Up (LWU) via WAKE Input Terminal
      7. 9.4.7 Driver and Receiver Function Tables
      8. 9.4.8 Digital Inputs and Outputs
      9. 9.4.9 INH (Inhibit) Output
  10. 10Application Information Disclaimer
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
        1. Bus Loading, Length and Number of Nodes
      2. 10.2.2 Detailed Design Procedures
        1. CAN Termination
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout
      1. 12.1.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Links
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Community Resources
    4. 13.4 Trademarks
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|14
  • DMT|14
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Local Wake Up (LWU) via WAKE Input Terminal

The WAKE terminal is a high voltage input terminal which can be used for local wake up (LWU) requests via a voltage transition. The terminal triggers a local wake up (LWU) event on either a low-to-high, or a high-to-low transition since it has a bi-directional input threshold (falling or rising edge).

This terminal may be used with a switch to VSUP or to ground. If the terminal is unused it should be pulled to ground or VSUP to avoid unwanted parasitic wake up events.

GUID-D727565B-36FE-4275-8C77-B8C1659C86C6-low.gifFigure 9-6 TCAN1043xx-Q1 WAKE Circuit Example

Figure 9-6 shows two possible configurations for the WAKE terminal, the low-side and high side switch configurations. The objective of the series resistor, RSERIES, is to protect the WAKE pin of the transceiver from over current conditions that may occur in the event of a ground shift or ground loss. The minimum value of RSERIES can be calculated using the maximum supply voltage, VSUPMAX and the maximum allowable current of the WAKE pin, IIO(WAKE). RSERIES is calculated using:


If the battery voltage never exceeds 58 V DC, then the RSERIES value is approximately 20 kΩ.

The RBIAS resistor is used to set the static voltage level of the WAKE pin when the switch is not in use. When the switch is in use in a high-side switch configuration, the RBIAS resistor in combination with the RSERIES resistor sets the WAKE pin voltage appropriately above the VIH threshold. The maximum value of RBIAS can be calculated using the maximum supply voltage, VSUPMAX, the maximum WAKE threshold voltage VIH, the maximum WAKE input current IIH and the series resistor value RSERIES. RBIAS is calculated using:

Equation 3. RBIAS < ((VSUP - VIH) / IIH) - RSERIES

If the battery voltage never exceed 58 V DC, then the RBIAS resistor value must be less than 60 kΩ.

For lower current consumption, the low-side switch configuration is the ideal architecture.

The LWU circuitry is active in Section 9.4.6, Section 9.4.4 and Section 9.4.5. If a valid LWU event occurs the device transitions to standby mode. The LWU circuitry is not active in Normal mode or Silent mode.

To minimize system level current consumption, the internal bias voltages of the terminal follows the state on the terminal with a delay of tWAKE(min). A constant high level on WAKE has an internal pull-up to VSUP and a constant low level on WAKE has an internal pull-down to GND. This minimizes the current flowing into the WAKE pin under these steady-state conditions so that it does not need to be factored into calculations of the total draw from VSUP.

The RXD pin is only driven once VIO is present.
Figure 9-7 Local Wake Up – Rising Edge
The RXD pin is only driven once VIO is present.
Figure 9-8 Local Wake Up – Falling Edge