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TCA4307: Hot swappable

Shunsuke Yamamoto
Expert 8461 points
Part Number: TCA4307


Tool/software:

Hi team,

What is the function of how swappable? How does it work in TCA4307?

Best regards,

Shunsuke Yamamoto

  • +1
    TI__Guru 51598 points

    Hi Yamamoto-san, 

    Section 7.4 does a good job describing the different functional modes of this device for hot-insertion / hot swap events. 

    In short, a hot swap connection occurs. The TCA4307 waits for both sides of the device to be IDLE pulled high. The TCA4307 will wait until it sees a stop condition or a bus idle condition on the "IN" side of the device. Once 1 of 2 of these qualifiers are met, the READY pin will release HIGH through a PU resistor - this can be used as a flag for the MCU to know when the buffer is internally connected the IN side to the OUT side. When READY = HIGH, the buffer is ready for communication on either side of the buffer. 

    Regards,

    Tyler