SLLSFV7A July   2024  – December 2025 TCAN1473A-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  ESD Ratings - IEC Specifications
    4. 5.4  Recommended Operating Conditions
    5. 5.5  Thermal Information
    6. 5.6  Power Dissipation Ratings
    7. 5.7  Power Supply Characteristics
    8. 5.8  Electrical Characteristics
    9. 5.9  Timing Requirements
    10. 5.10 Switching Characteristics
    11. 5.11 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Signal Improvement
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Supply Pins
        1. 7.3.1.1 VSUP Pin
        2. 7.3.1.2 VCC Pin
        3. 7.3.1.3 VIO Pin
      2. 7.3.2 Digital Inputs and Outputs
        1. 7.3.2.1 TXD Pin
        2. 7.3.2.2 RXD Pin
        3. 7.3.2.3 nFAULT Pin
        4. 7.3.2.4 EN Pin
        5. 7.3.2.5 nSTB Pin
        6. 7.3.2.6 INH_MASK Pin
      3. 7.3.3 GND
      4. 7.3.4 INH Pin
      5. 7.3.5 WAKE Pin
      6. 7.3.6 CAN Bus Pins
      7. 7.3.7 Faults
        1. 7.3.7.1 Internal and External Fault Indicators
          1. 7.3.7.1.1 Power-Up (PWRON Flag)
          2. 7.3.7.1.2 Wake-Up Request (WAKERQ Flag)
          3. 7.3.7.1.3 Undervoltage Faults
            1. 7.3.7.1.3.1 Undervoltage on VSUP
            2. 7.3.7.1.3.2 Undervoltage on VCC
            3. 7.3.7.1.3.3 Undervoltage on VIO
          4. 7.3.7.1.4 CAN Bus Fault (CBF Flag)
          5. 7.3.7.1.5 TXD Clamped Low (TXDCLP Flag)
          6. 7.3.7.1.6 TXD Dominant State Timeout (TXDDTO Flag)
          7. 7.3.7.1.7 TXD Shorted to RXD Fault (TXDRXD Flag)
          8. 7.3.7.1.8 CAN Bus Dominant Fault (CANDOM Flag)
      8. 7.3.8 Local Faults
        1. 7.3.8.1 TXD Clamped Low (TXDCLP)
        2. 7.3.8.2 TXD Dominant Timeout (TXD DTO)
        3. 7.3.8.3 Thermal Shutdown (TSD)
        4. 7.3.8.4 Undervoltage Lockout (UVLO)
        5. 7.3.8.5 Unpowered Devices
        6. 7.3.8.6 Floating Terminals
        7. 7.3.8.7 CAN Bus Short-Circuit Current Limiting
    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 Silent Mode
        3. 7.4.1.3 Standby Mode
        4. 7.4.1.4 Go-To-Sleep Mode
        5. 7.4.1.5 Sleep Mode
          1. 7.4.1.5.1 Remote Wake Request via Wake-Up Pattern (WUP)
          2. 7.4.1.5.2 Local Wake-Up (LWU) Using WAKE Input Terminal
      2. 7.4.2 CAN Transceiver
        1. 7.4.2.1 CAN Transceiver Operation
          1. 7.4.2.1.1 CAN Transceiver Modes
            1. 7.4.2.1.1.1 CAN Off Mode
            2. 7.4.2.1.1.2 CAN Autonomous: Inactive and Active
            3. 7.4.2.1.1.3 CAN Active
          2. 7.4.2.1.2 Driver and Receiver Function Tables
          3. 7.4.2.1.3 CAN Bus States
  9. 8 Application Information Disclaimer
    1. 8.1 Application Information
      1. 8.1.1 Typical Application
      2. 8.1.2 Design Requirements
        1. 8.1.2.1 Bus Loading, Length and Number of Nodes
      3. 8.1.3 Detailed Design Procedure
        1. 8.1.3.1 CAN Termination
      4. 8.1.4 Application Curves
    2. 8.2 Power Supply Recommendations
    3. 8.3 Layout
      1. 8.3.1 Layout Guidelines
      2. 8.3.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.4 Device Functional Modes

The TCAN1473A-Q1 has six operating modes: normal, standby, silent, go-to-sleep, sleep, and off mode. Operating mode selection is controlled using the nSTB pin and EN pin in conjunction with supply conditions, temperature conditions, and wake events.

TCAN1473A-Q1 TCAN1473A-Q1 State MachineFigure 7-6 TCAN1473A-Q1 State Machine
  1. The enable pin can be in a logical high or low state while in sleep mode but since the pin has an internal pull-down, the lowest possible power consumption occurs when the pin is left either floating or pulled low externally.
  2. At power-up, the undervoltage timers for VCC and VIO are disabled, allowing for longer period for VCC and VIO supplies to power up (up to tINACTIVE). VCC or VIO need to be above UVCC(R) and UVIO(R) respectively to enable the respective tUV timers. The VCC undervoltage timer starts when VCC falls below UVCC(F), while VIO undervoltage timer starts when VIO falls below UVIO(F). When either of these timers exceed tUV, the device enters sleep mode.
  3. The Sleep Wake Error (SWE) timer starts as soon as the device enters Standby mode. The timer halts and resets as soon as the device enters Normal mode. If the device enters Silent mode from Standby mode, the SWE timer does not halt and the device needs to be transitioned to Normal mode before the SWE timer expires. If the device enters Silent mode from Normal mode, the SWE timer is not active in Silent mode.
  4. When the Sleep mode is entered from Go-To-Sleep Mode or from a UVCC or UVIO event, a low-to-high transition on nSTB is required to move the device into Normal or Silent mode. If EN is high during the rising edge on nSTB, the device moves to Normal mode. If EN is low during the rising edge on nSTB, the device moves to Silent mode. VIO must be above UVIO(R) to leave Sleep mode using the EN and nSTB signals.
  5. When Sleep mode is entered due to an SWE timer timeout (>tINACTIVE), there is an extra requirement to exit Sleep mode and transition into Normal or Silent mode directly using the EN and nSTB signals. To move to Normal mode, the nSTB pin must be high and a low-to-high transition must occur on EN. To move to Silent mode, the nSTB pin must be high and a high-to-low transition must occur on EN. If the device entered Sleep mode while the nSTB is already high, there must be a transition on the EN pin while nSTB is low prior to the sequence described above. See Figure 7-7 for more information. VIO must be above UVIO(R) to leave Sleep mode by using the EN and nSTB signals.
TCAN1473A-Q1 TCAN1473A-Q1 Transitioning from Sleep Mode to Normal or Silent Mode if Sleep Mode is Entered Due to SWE Timer Timeout
  1. nSTB must remain low for a minimum of tMODE1 after the edge on EN. Once this tMODE1 has elapsed, nSTB can be driven high. The following edge on EN causes the device to exit Sleep mode. The final edge on EN does not have any minimum delay from the rising edge of nSTB. The enable pin can be in a logical high or low state while in sleep mode, but since the pin has an internal pull-down, the lowest possible power consumption occurs when the pin is left either floating or pulled low externally.
Figure 7-7 TCAN1473A-Q1 Transitioning from Sleep Mode to Normal or Silent Mode if Sleep Mode is Entered Due to SWE Timer Timeout
Table 7-4 TCAN1473A-Q1 Mode Overview
MODEVCC and VIOVSUPENnSTBWAKERQ FLAGDRIVERRECEIVERRXDINH
Normal> UVCC and > UVIO> UVSUPHighHighXEnabledEnabledMirrors bus stateOn
Silent> UVCC and > UVIO> UVSUPLowHighXDisabledEnabledMirrors bus stateOn
Standby> UVCC and > UVIO> UVSUPHighLowSetDisabledLow power bus monitor enabledLow signals wake-upOn
> UVCC and > UVIO> UVSUPLowLowXDisabledLow power bus monitor enabledLow signals wake-upOn
> UVCC and < UVIO> UVSUPLowLowXDisabledLow power bus monitor enabledHigh impedanceOn
Go-to-sleep(1)> UVCC and > UVIO> UVSUPHighLowClearedDisabledLow power bus monitor enabledHigh or high impedance (no VIO)On(2)
Sleep(3)> UVCC and > UVIO> UVSUPHighLowClearedDisabledLow power bus monitor enabledHigh or high impedance (no VIO)High

Impedance

< UVCC or <UVIO> UVSUPXXXDisabledLow power bus monitor enabledHigh or high impedance (no VIO)High impedance
ProtectedX< UVSUPXXXDisabledDisabledHigh impedanceHigh impedance
(1) Go-to-sleep: Transitional mode for EN = H, nSTB = L until tGOTOSLEEP timer has expired.
(2) The INH pin transitions to high impedance after the tGOTOSLEEP timer has expired.
(3) Mode change from go-to-sleep mode to sleep mode once tGOTOSLEEP timer has expired.