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THVD1429: Driver status when device is not powered

Alberto Burani
Intellectual 345 points

Part Number: THVD1429

Hello

does anyone knows the behaviour of the driver stage of this part when the VCC is not supplied? I would like to know if the driver remains in high impedance allowing the BUS to properly works even when vcc is not supplied.

Thank you

  • 0
    TI__Guru 62920 points

    Hi Alberto,

    Yes, the THVD1429 is designed such that the driver outputs (pins A and B) will be high impedance when the device is unpowered.  For details you could reference the "bus input current" specification, which gives a test condition including both VCC = 0 V and VCC = 5.5 V.   (It is listed in the receiver section rather than the driver section, but really it defines both - the receiver inputs and driver outputs share a common pair of pins for a half-duplex transceiver like this.)

    Please let me know if you have any further questions.

    Regards,
    Max