NE5532: 413111

Hi Janett, 

Janett Aguilar said:

The 1st picture is a "good" chip, the 2nd picture is a label from a reel
that the "good" chips came from, Made in Mexico

The PCN has issued in NE5532 product due to RFAB change. Both pre-PCN and post-PCN are in the inventory currently. 

The "good" ICs, made in Mexico is likely manufactured by pre-PCN process. The "bad" ICs (made in Malaysia) by the customer is likely the post-PCN good that is related to the information below. 

https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5726/PCN20231114002.1.pdf

Both pre-PCN and post-PCN products are equivalent, but they may have some differences (e.g. GBW and open loop output impedance etc.). If the customer is able to send us the schematic, we can review the circuit and make a suggestion to compensate for the post-PCN op amp product. It is likely that it is op amp stability related issues in post-PCN product. Please specify the findings that are associated with "bad" behaviors, so that we can correct the behaviors for the customer's product.  

If the customer does not want to post the schematic in public forum, please post a "friendship" request over E2E, and we are able to establish a communication via E2E private messaging system. Please let us know. 

Best,

Raymond 

Hi Janett, 

Ok, please let us know. 

Best,

Raymond

Hello Raymond, 

The customer responded with the below information:

"For information back to TI via Mouser:

In the application where we are experiencing failures of NE5532DR and it
has been identified as post PCN inventory that is failing, in our circuit
application we are employing power rails at +/-20 VDC.

We have been building our product with these power supply rail voltages,
which are within the +/-22VDC ABS MAX specifications, for 15+ years and
have not experienced any failures related to the supply rail voltages
until now with the post PCN parts.

The post PCN parts appear to be failing immediately and catastrophically
when supply voltage rails of +/-20VDC are applied.
Additionally, we have numerous other products where we employ +/-18VDC
power rails and have also seen significant rise in failures on these
products where post PCN parts have been placed.

Our usage of +/-18VDC and +/-20VDC are within the ABS MAX specification of
the parts but the post PCN parts appear to be unable to tolerate the
specified ABS MAX voltage.

We need to be able to utilize NE5532DR parts without regard to pre/post
PCN conditions.

The post PCN NE5532DR parts are clearly not meeting your published
specifications therefore we propose and demand this issue to be escalated
for immediate resolution.

This a very serious problem and we need to know how to move forward."

Hi Janett,

Janett Aguilar said:

Additionally, we have numerous other products where we employ +/-18VDC
power rails and have also seen significant rise in failures on these
products where post PCN parts have been placed.

I understand your frustration. However, the pre-PCN NE5532DR's max. supply ratings is up to ±22Vdc, and the recommended operating voltage is only rated up to ±15Vdc or total Vs = Vcc - Vee <= 30Vdc (single supply rail). 

The post-PCN NE5532DR is rated at the similar range, slightly higher in the recommended operating voltage up to +/-16Vdc, NOT +/-20Vdc. In addition, the abs. max. voltage rating in the post-PCN is rated slightly lower up to 36Vdc (36Vdc in single supply rail, or +/-18Vdc in dual supplies), which is the abs. max. ratings. 

If your product has to withstand +/-20Vdc in abs. max. ratings, then please consider OPA1678 or similar audio amplifier product. OPA1678 is a low cost and high performance audio amplifier. In terms of recommended operating voltage, it is still considered as 36Vdc in a single supply or +/-18V in dual supplies. 

Here is our precision audio op amp link. 

https://www.ti.com/product-category/amplifiers/op-amps/audio/overview.html

If you have other questions, please let us know. 

Best,

Raymond