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TCA9511A: TCA9511A I2C hot-plugging

Wang Bill
Prodigy 20 points

Part Number: TCA9511A

Hi Expert,

Could you help to check if TCA9511 on main board of which SCL/SDA In are connecting I2C Master, and SCL/SDA Out are connecting AC PSU hot-plugging in/out? Is it workable? And can TCA9511 SCL/SDA In be connecting In in series connection? There's only SCL/SDA Out connecting Out on 10.2.1.1 Series connections of TCA9511 datasheet.

  • 0
    TI__Guru 61608 points

    Hi Wang,

    Adding Jack to help with your question. 

    Regards,

    Tyler

  • 0
    TI__Guru 56281 points

    Hi Wang,

    This device can be used in a hot-plug I2C application as the device keeps the buses disconnected during the insertion event. Once the buses are idle or a stop bit on IN side is detected, the TCA9511A connects the buses and READY goes high. The device can also be used in series, however the VOL after each TCA9511A used in series will be increased by an offset of ~60mV due (explained further in section 9.2.1 of the data sheet). 

    Regards,

    Jack