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Original question:

TCAN1042GV-Q1: Could you please provide the welding furnace temperature curve of TCAN1042GVDRQ1?

TCAN1042GV-Q1: TXD 4.8V

dawei sun
Prodigy 10 points
Part Number: TCAN1042GV-Q1
Other Parts Discussed in Thread: TCAN1042G-Q1,

Tool/software:

Hello TI colleagues，
I used below CAN FD chip to create a test PCBA to verify this chip performance,
but I can not send any CAN/CANFD msg when I power supply for this CAN transceiver with 5V,
below is my config:
     - 5V power for PIN3 Vcc
     - STB configured with Low Voltage == GND
     - GND connect with GND of battery
     - TXD connect with MCU TXD,  <-- verified this pin voltage is 4.9V
but CANL and CANH verified is 0V;
No messges is occured in CANoe trace;
could you do me a favor and help me clarify where is the isuue
TCAN1042GVDRQ1
thanks！
BR
SDW
  • 0
    TI__Mastermind 28030 points

    Hi Dawei,

    Thanks for your reaching out on E2E.

    Do you have VIO supplied? The V-suffix device requires a second power supply VIO for I/O level-shifting.

    If you don't need this feature, please use TCAN1042G-Q1.

    Regards,

    Sean

  • 0 in reply to Sean Guo
    Prodigy 10 points

    Hello Sean,

    thanks you response!

    I selected this chip TCAN1042GVDRQ1, maybe below red mark one;  I prefer this one is because the CANFD capability though not use 3V level shifter;

    I checked data sheet, maybe the the green marked could explain my confusing, 

    anyway very thanks your answer!

    BR

    SDW

  • 0 in reply to dawei sun
    TI__Mastermind 28030 points

    Hi Dawei,

    The G suffix represents the device can support up to 5Mbps (2Mbps on non-G device), V represents the device support level shifter so it has a VIO supply on pin 5 (NC on non-V device). You still need to supply VIO with 5V even if 3V level shifter not used. The TCAN1042GV-Q1 will not work if VIO is not supplied. Can you please check if VIO is also supplied 5V?

    When you input a 5V on TXD, the output on CAN bus will be recessive, however the voltage level should be at common mode 2.5V, not 0V.

    Regards,

    Sean