TXB0104: sometime power will be turn off randomly

David lin

Part Number: TXB0104
Other Parts Discussed in Thread: TXU0304, TXU0104, TXU0204

Hi
we use your TXB0104 for our new ODM project design,
our MCU control PSU(MCUoutput/PSU input) via TXB0104 level shift

(TXB0104 between MCU with PSU)

currently our customer highlight sometime power will be turn off randomly
we measure TXB0104 output pin (pin 7) get abnormally waveform as attached,
could you please give me some suggestion ?

Q1: why we see waveform will be switch ??
Q2: do you suggest pin to pin solution to replace defect parts??

[waveform]

[MCU TXB0104 circuit]

[PSU audio_on circuit]

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 295460 points

The TXB has a drive strength of 20 µA, which is not enough for that circuit.

For unidirectional signals, use a unidirectional translator like the TXU0104/TXU0204/TXU0304.

0 David lin over 1 year ago in reply to Clemens Ladisch

Prodigy 135 points

Hi Clements

thanks for your reply, we will use TXU0104 to check , it drive strength up to 12mA at 5V,

because I need to explain why work abnormally with my customer, I can't find driver strength of 『20uA』 in datasheet ,

could you tell me where I can find it.

0 Michael Ikwuyum over 1 year ago in reply to David lin

TI__Mastermind 37465 points

Hi David,

Please help see below from the datasheet, thanks.

Best Regards,

Michael.

Logic

Logic forum

TXB0104: sometime power will be turn off randomly