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TCAN4550: TCAN4551 vs TCAN4550: LDO

Lucas Pucheta
Expert 4741 points
Part Number: TCAN4550
Other Parts Discussed in Thread: TCAN4551-Q1,

What is the difference between the TCAN4551-Q1 and the TCAN4550-Q1?

The comparison table shows the TCAN4551-Q1 without an LDO but the datasheet is showing an LDO. Is this a mistake with the comparision table? I understand the TCAN4551-Q1 does not support SBE.

 

  • 0
    TI__Mastermind 33440 points

    Hi Lucas,

    I'm not sure I understand what you are referring to with "SBE". 

    Both the TCAN4551-Q1 is a reduced feature version of the TCAN4550-Q1.  Both devices have a 5V LDO used to supply the CAN transceiver, but the TCAN4551-Q1 does not have the capability to source excess current from this LDO to power external circuitry.

    The TCAN4551-Q1 also has the Watchdog removed and the input capability of the GPIO1 pin which was used to service the watchdog.  Therefore this pin can only be used as an output.

    The VIO undervoltage lockout was also removed in the TCAN4550-Q1 which allows it to be used in 1.8V digital IO applications.  However, because the VIO powers the crystal/clock circuit, a single-ended clock must be used when VIO=1.8V.  Either 3.3V or 5V is required when using a crystal oscillator.

    Regards,

    Jonathan