TXS0108E: [TXS0108EPWR] Inquiry about distortion of output waveform

MJ Jeon

Genius 5240 points

Part Number: TXS0108E
Other Parts Discussed in Thread: TXU0304

Hi, TI Support Team

Inquiries regarding the following items have been received from customers.

TXS0108EPWR product is being used and SPI and data signal are input as input.

The clock is 18.8 MHz.

Vcca=3.3V

Vvvb=5V

The output waveform is distorted and output, please review what is the cause.

Below is the circuit diagram. Please review the circuit diagram for errors.

There is a possibility that it may be affected by the clock, so I changed it to TXB0108PW and tested it, but the waveform is distorted in the same way.

Thanks.

Regards,

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 242930 points

Please show the output waveform.

But I guess that the capacitive load is too high (the edge accelerators of both the TXS and TXB have problems with that). What is connected to the outputs? Are there long traces, connectors, or cables?

0 Michael Ikwuyum over 1 year ago in reply to Clemens Ladisch

TI__Mastermind 21935 points

Hi MJ,

In addition to Clemens' feedback, please note that the devices you are trying to use are not recommended for SPI applications and would suggest considering two TXU0304 to better suit the application, thanks.

Best Regards,

Michael.

Logic

Logic forum

TXS0108E: [TXS0108EPWR] Inquiry about distortion of output waveform