Port internal circuit

ACGUY

Part Number: TXS0104E

Hello E2E,

The datasheet states that when it enter Low into the OE port, each I/O_port will be High-Z.
Each I/O_port has pull-up resistor.

Q1: If the OE has Low, is each I/O_port High?
Q2: Why is Ioz(High-impedance state output current) 2-uA? With a 10-kohm pull-up resistor only, Ioz should be around 100-uA.
Q3: Does the each I/O_port have an internal buffer circuit?

We want to do set to Low for I/O_port when device disable.
Q4: Is pull-down resistor effective on I/O_port?

Regards,
ACGUY

over 4 years ago

+1 Clemens Ladisch over 4 years ago

Guru 317280 points

See [FAQ] If the OE pin is asserted to maintain Hi-Z at the IO, will it disconnect the internal pull-up resistors in TXS devices?

It would be possible to add pull-down resistors, but when the TXS is enabled, they form a voltage divider together with the internal 10 kΩ pull-ups, so they must be much weaker than those.

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Port internal circuit