TXS0104E: using a 5V SPI waveform output from the MCU to the B end of the chip TXS0104EPWR. I hope the A end can output a 3.3V waveform

Bao Songhao

Part Number: TXS0104E

Tool/software:

Hello, I'm using a 5V SPI waveform output from the MCU to the B end of the chip TXS0104EPWR. I hope the A end can output a 3.3V waveform. However, when I designed it as follows, I found no waveform output. Could you please help me check which side has the problem?

3 months ago

0 Jack Guan 3 months ago

TI__Mastermind 44451 points

Hi Bao,

What is the state of the VCCA/ VCCB/ OE pins at the time of testing? Is the B-side inputs referenced to 5V? It is suggested to also see if power supply current is being clamped and continuity checks for all the pins to rule out potential shorts.

Regards,

Jack

0 Bao Songhao 3 months ago in reply to Jack Guan

Intellectual 840 points

VCCA is stable at 5V, VCCA is stable at 3.3V, and OE is stable at 5V

0 Jack Guan 3 months ago in reply to Bao Songhao

TI__Mastermind 44451 points

Hi Bao,

Did you mean VCCB is at 5V? Please note that VCCA at 5V will damage the device. (The absolute max rating for VCCA is 4.6V). Please share any other detail may you have regarding the setup to debug this further.

Regards,

Jack

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TXS0104E: using a 5V SPI waveform output from the MCU to the B end of the chip TXS0104EPWR. I hope the A end can output a 3.3V waveform