DS34C87T: Damage to input pins

David,

I'm not sure if it's a ESD damage. But it looks like the pin is no longer a high impedance. You can confirm this by measuring how much current is drawn from DS34C87T when the input is around 1.2V? Can you contact TI quality team to submit the parts for the failure analysis? Knowing what went wrong in IC could help identity the cause.

Regards,

Hao

David,

Have you been able to debug the issue further? Do you have any new information? Please let me know if there are anything I can help.

Regards,

Hao

Hello Hao,

Thank you for your response. We are working with our distributor (Arrow) to return the parts for evaluation. We filled out the return paperwork from Arrow but are haven't received authorization to return the parts yet. Can you provide any guidance regarding how long it will take for TI to evaluate the parts after they are received?

Below is an X-Ray of a failed DS34C87T part. The circled area is thought to be a damaged wire bond. 

Any guidance you can provide will be appreciated. 

Thank you, Dave Fenton

Dave,

Once the parts are returned to TI the Failure Analysis may take up to 14-20 days to complete, or possibly more depending on the complexity of the issue. 

As the quality team checked, they haven’t seen this return entered into TI system yet. So I assume it is still being processed on Arrow’s side. Can you push them to expediate it?

Regards,

Hao

Hello Hao,

Arrow issued a return authorization for the parts. The 3 ICs were received at Arrow's return facility in Reno on July 23. Can you determine if they are in the TI system yet?

Thank you,

Dave

Hi Dave,

I think we'll need to confirm on Monday if that is OK with you.  Both Hao and the component quality engineer involved in this effort are out of the office for the remainder of this week.

Regards,
Max

Hi Max,

That is fine.

Thank you,

Dave

Dave,

I wasn't able to get a hold of the quality engineer today; I will discuss with him more tomorrow.  Sorry for the delay.  I did check our internal return database and didn't see any recent entries involving this device, though.  Have you received any further status updates from Arrow?

Max

Dave,

Just to follow up - it seems there was an approval that had stalled on our end after Arrow submitted the failure analysis request to us.  That is resolved now and so Arrow should be getting a message indicating where to ship the units.  Sorry about the delay on this.

I think it may make sense to continue the discussion over email at this point.  If you agree, I'll contact you via the address associated with your myTI account.

Regards,
Max