TXB0104: there is no output on pins B if there are signals of input pins

Yellow line A2 input, purple   B2 output.

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Hi,

Based on the picture you gave, the TXB is connected correctly. But what are the lines connected to? If the output is being held low by another device, TXB does not have the drive strength to pull it up.

What channel are you showing in the scope shot?

Can you confirm that OE pin is at 1.8V at the pin?

Thanks!

-Karan

"But what are the lines connected to? If the output is being held low by another device, TXB does not have the drive strength to pull it up."

They were connected to  ICM-20948, but it didn't work. So I decided disconnect from this IC and try without it. There is no output signal in any cases.

"What channel are you showing in the scope shot?"

Output pins are disconected (left floating), yellow pin 3 (A2) - purple  pin 12 (B2).

"Can you confirm that OE pin is at 1.8V at the pin?"

yes

I've tryed two ICs,but result is the same. Please see connection schematic for B output of level shifter.

Hi Vasyl,

Thanks for confirming with initial questions from Karan.

I see that the input is fine, and probing at the output without any IC should have shown some response. It is unlikely that 2 ICs you have tried would behave the same way. Please share the top side marking of the device, we can also look internally if there were any issues( unlikely).

Is this on all the output pins or only on A2/ B2 channels?  Meanwhile, please show the Vcca, Vccb, and OE pins scope shots.

I am also confused here. You have A2 (and Vcca ) at 1.8V level, but the scopeshot shows 3.3V input? Please confirm.

and please put the trigger level below 1.8V and on the output channel.

Hi Shreyas, 

thank you for fast responce. Tomorrow I'will attached scope shots that you require. And photo of the top of ICs.

Thanks,

Vasyl

"I am also confused here. You have A2 (and Vcca ) at 1.8V level, but the scopeshot shows 3.3V input? Please confirm."

you are right. scope picture is correct but my description is wrong. Input is B2, and output is A2. 

Thanks,

Vasyl

"Please share the top side marking of the device, we can also look internally if there were any issues( unlikely)."

Please see attached picture.

Is this on all the output pins or only on A2/ B2 channels?  

The same situation for all pins, no output even there are signals on input pins.

"Meanwhile, please show the Vcca, Vccb, "

yellow VCCA - 1.8, purple VCCB- 3.3V 

yellow - B2 (input), purple - OE.

"what is that paper which seems to be in the within the device pins? " 

The paper is dedicated to isolate 1.8 pins of TXB0104 from IMU IC (to make sure this IC doesn't make any influence on TXB0104)

"Would you happen to have another set of devices(not from the same lot/ reel) which you could try out? "

I've bought 5 TXB0104 and will try when they arrived.