Part Number: TXU0202
Hi TI Team,
The device marking of TXU0202DCUR cannot be found in datasheet. How to verify that the chip (Top marking : 2PCT) is belong to TXU0202DCUR or not, please advise. Thanks.
The TXS is a passive switch; the high-level voltage indeed is created by the internal pull-up resistor. The higer spike is caused by the TXS's edge accelerators.
UART signals are unidirectional; use a unidirectional translator like the TXU0202.
Please note that all auto-bidirectional devices will have bias requirements for their supplies.
A good recommendation would be TXU0102 or TXU0202 (4 channel options are also available if needed) as UART signals are not auto-bidirectional…
The LSF is just a passive switch. It does not detect anything; pull-up resistors are needed when the circuit is not able to generate a high voltage otherwise.
Even with push/pull input signals, the LSF outputs usually need pull-up resistors. See the FAQ…
In addition to Clemens' feedback, please note that the device you are trying to use is not recommended for UART applications and would suggest considering using TXU0202, thanks.
The TCA9416 can be used for push/pull signals, but its outputs always are open drain. It can be used for all these applications as long as you do not need pull-down resistors and the speed is below 1 MHz.
Possible alternatives are TCA9800/1/2/3 for I…