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ESD2CAN24-Q1: Difference between CAN and CAN FD

Frank QIN
Expert 8950 points
Part Number: ESD2CAN24-Q1
Other Parts Discussed in Thread: ESD2CAN24, ESD2CANFD24, , ESD2CANFD24-Q1

Tool/software:

Hi Team,

We are comparing the ESD2CAN24-Q1 and ESD2CANFD24-Q1. According to the datasheet, we didn't find too much spec or data difference between the ESD2CAN24 and ESD2CANFD24, we would like to learn which value is the key spec for ESD2CANFD24 to support CAN FD?

Due to our pcb is reserved SC-70 pkg to ESD production TVS, we also would like to know if ESD2CAN24 can support CAN FD communication?

Thanks!

Best,

Frank

  • 0
    Guru 317370 points

    CAN FD uses higher data rates, so the "FD" diode has a lower capacitance to allow a higher signal bandwidth.

    Here is a list of diodes with a working voltage of at least 24 V and a low capacitance: ti.com/interface/diodes/esd-protection-diodes/products.html#1498=Automotive&3285=24;36&1516typ=0.13;2.5
    There is none in the SC-70 package.

    If the total capacitance of your CAN bus is low enough, then you might be able to use a diode with a higher capacitance.

  • 0
    TI__Expert 8400 points

    Hi Frank, 

    To add onto what Clemens said, the main differences between ESD2CAN24-Q1 and ESD2CANFD24-Q1 is capacitance, ESD rating, and surge current. I have provided a table below to compare the two. Also, ESD2CAN24-Q1 comes in both SOT-23 and SC-70. 

    Devices ESD2CAN24-Q1 ESD2CANFD24-Q1
    Number of Channels 2 2
    Bi/Uni-Directional Bidirectional Bidirectional
    Working Voltage (Vrwm) 24V 24V
    Clamping Voltage 35V @ 16A TLP 36V @ 16A TLP
    Capacitance (pF) 3pF 2.5pF
    IEC 61000-4-2 (Contact/Air) (kV) 30kV/30kV 25kV/25kV
    IEC 61000-4-5 (Surge) 5.7A 3.5A
    Max Leakage Current   50nA 50nA
    Package Designator SOT-23, SC-70 SOT-23

    Please let me know if you have any questions or comments. 

    Best,

    McKenzie

  • 0 in reply to McKenzie Eaker
    TI__Expert 8950 points

    Hi Clemens and McKenzie,

    Thanks for your reply.

    Just curious, why the CAN FD part doesn't have SC-70 package?

    We have reserved SC-70 layout on the PCB, or can we apply ESD2CAN24 for CAN FD network?

    Thanks

    Best,

    Frank

  • 0 in reply to Frank QIN
    TI__Expert 8400 points

    Hi Frank, 

    Yes, you can use ESD2CAN24 for the CAN FD network. I wasn't hear at the time of this part definition so I am not entirely sure why the CAN FD part is not in the SC-70 package. 

    Best,

    McKenzie