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Is P82B96 Hot swappable ?

Other Parts Discussed in Thread: P82B96, TCA4311A, TCA9517, TCA9617A

I need to drive a long cable (200 meters)with I2C data and be able to hot swap. P82B96 may be able to drive it because it can handle 4000pF but I don't know if it can be hot swapped.  I cannot take care of hot

Is P82B96 Hot swappable ?

  • Hello Hoshang,

    Thanks for the question.

    If you require a true hotswap capable part, then the TCA4311A is currently our only device supporting hot swap capabilities like this. If your setup can handle data glitch during a the event of a slave connecting to it, then our repeaters can handle a hot connect event. It seems like you are not able to handle a hot connect case.

    I don't believe 1nF or even 4nF (in the case of the P82B96) will be capable of driving a 200 m cable. The capacitance varies significantly by cable, but I've never seen a cable this long able to hit that low of a capacitance (if you do manage to find one, please share!).

    I believe you will need to go with multiple I2C buffers and repeaters in series in order to achieve 200m cable length (essentially splitting the load into smaller segments).

    It might also be possible to use some repeaters in series with a TCA4311A, but you will need to take care in order to make sure the B side of a TCA9517/9617A is not connected to the TCA4311A side. You CANNOT use a static voltage offset buffer with the rise time accelerators in the TCA4311A.

    It would be possible to attempt this with multiple P82B96 or a few TCA9617As (I suggest TCA9617A over TCA9517 because it has smaller propagation delays, which will be critical to your communication speed supported by such a large length of cable)