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TXS0108E: CLK signal

Chong Yu

Intellectual 1435 points

Part Number: TXS0108E

Hi,

My customer need assistance.

When using the chip TXS0108EPWR, the 3.3V side is connected to VCCB, the 1.8V side is connected to VCCA, the OE end is pulled up to 1.8V on 10K, and the B side is connected to JTAG, TDO, TMS, TDI, TCK.

Problem: The 1.8V side（side A） directly connect the JTAG ，It can communicate normally, but through TXS0108, measuring TCK（pin14） signal is incorrected，why？Looking forward to your reply.

Please help. Thanks.

over 3 years ago

0 Clemens Ladisch over 3 years ago

Guru 317370 points

Please show a schematic.

What is wrong with the signal? Can you show an oscilloscope trace?

0 Chong Yu over 3 years ago in reply to Clemens Ladisch

TI__Intellectual 1435 points

Hi Ladisch,

Are you an engineer of TI? I am not seeing this post assigned to anyone.

Regards.

0 Clemens Ladisch over 3 years ago in reply to Chong Yu

Guru 317370 points

I'm just a random guy on the internet.

0 Chong Yu over 3 years ago in reply to Clemens Ladisch

TI__Intellectual 1435 points

Hi Ladisch,

Thanks for your warmth. But I have a customer. I have to build communication between customer and TI's engineer.

Thanks again.

0 Dylan Hubbard over 3 years ago in reply to Chong Yu

TI__Mastermind 46045 points

Hey Chong,

Please show a schematic.

What is wrong with the signal? Can you show an oscilloscope trace?