TXB0108: TXB0104QPWRQ1 level translator is failing to translate from low to high & high to low when processor gpio pin is set to out(in/out),can you please help to resolve the issue.

satish reddy27

Part Number: TXB0108

TXB0104QPWRQ1 level translator is failing to translate from low to high & vice versa when processor gpio pin is set to out(in/out),can you please help to resolve the issue.

Issue explained below:

When processor is set to out and gpio pin will be at high level(1.8V) which connects A side of level translator(VCCA=1.8V) and when low is passed from 3.3V devices through B side level translator(3.3V) its observed that the processor GPIO pin is still at high & failing to pull down to low by level translator, please help to resolve the issue.

Thanks & Regards,

Satish

over 6 years ago

0 satish reddy27 over 6 years ago

Prodigy 30 points

Attached the schematics below.

0 Emrys Maier over 6 years ago in reply to satish reddy27

TI__Guru* 97046 points

Hi Satish, and welcome to the forums!

The schematic did not come through (what you see is what I see). I will need to see that -- also, can you post a scope shot of the input and output together?

Logic

Logic forum

TXB0108: TXB0104QPWRQ1 level translator is failing to translate from low to high & high to low when processor gpio pin is set to out(in/out),can you please help to resolve the issue.