SN74LV161A: Quality issue

Danilo A.

Mastermind 31900 points

Part Number: SN74LV161A

Hi Team,

Posting on behalf of our customer.

I will share this E2E post to our customer so he can reply when needed.

I have attached both images. The top image is from the new production (new code) and the bottom image is from the old production (old code).

This is a series device since 2022.

The device exhibits significant speed fluctuations, especially at 1000 rpm.

We have equipped approximately 20 circuit boards with the old production (old code) and the error has been fixed.

The question is: Does the new production (new code) that we are now using come from TI?

I would be very grateful for your feedback!

SN74LV161APWR.pdf

Regards,

Danilo

8 days ago

0 Malcolm Lyn 8 days ago

TI__Mastermind 30710 points

Hi Danilo,

Does the customer have the shipping label? I can't identify either device from the top marking alone.

Best,

Malcolm

0 Clemens Ladisch 8 days ago

Guru 320650 points

New devices might be more sensitive to violations of the ∆t/∆v limit or the V_IL/V_IH thresholds. Please show an oscilloscope trace of a rising edge of the CLK signal.

0 Danilo A. 7 days ago in reply to Clemens Ladisch

TI__Mastermind 31900 points

Hi Malcolm, Clemens,

Thank you for your response.

I have shared this thread to our customer so he can continue the communication with you.

Regards,

Danilo

0 Danilo A. 6 days ago in reply to Danilo A.

TI__Mastermind 31900 points

Hi Malcolm, Clemens,

For some reason, our customer can't reply to this thread. Please see his response below.

I recorded the rise of the CLK signal. The site isn't working well; I couldn't update my email address.

I don't have a shipping label. I have an HS code from the new IC version, which is: 8542399000.

Regards,

Danilo

0 Clemens Ladisch 6 days ago in reply to Danilo A.

Guru 320650 points

This looks OK.

What exactly do you mean with "speed fluctuations"? Does it count too fast or too slow? Can you show the input and the wrong output together on the oscilloscope?

Logic

Logic forum

SN74LV161A: Quality issue