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There is no internal pull-down resistor at the OE pin.
The datasheet tells you that if you want the I/Os to be high impedance during power up, then you must add a pull-down resistor, and force OE high later.
(The pull-up resistors at the I/O pins are disconnected when OE is low, or when either supply is at zero.)
Hi Clemens,
Thank you for your reply.Then I have a question. If the chip is not powered when the TXS0104 is powered off, will the TXS0104 affect the pull-up signal in the original circuit? If OE is connected with a pull-down resistor, will it affect the pull-up signal?
When the TXS is disabled or powered off, the internal pull-up resistors are disconnected.
Hi Clemens,
When the TXS is unpowered, all I/Os have high impedance, i.e., they are disconnected. If there are external pull-up resistors, they will pull the signals high.