LM321: Markings to ID RoHS or non-RoHS part

Stephen Smith27

Part Number: LM321

I have some older boards we need to ID as RoHS or non-RoHS. Is there a date code or package marking that will identify the LM321 parts installed as RoHS or not?

over 4 years ago

0 Former Member over 4 years ago

Hi Stephen,

Do you know the full part number? If you don't, a picture of the top-side markings would help.

If you dig around on the part's page on ti.com, you'll come across the following information. Looks like the "NOPB" parts are ROHS compliant and the others are not.

Let me know if you you have any further questions.

Regards,

Daniel

0 Ron Michallick over 4 years ago

TI__Guru*** 140026 points

Stephen,

Do you have the full part numbers? Do you know approximately how old the boards or LM321 may be?

Samples of top side markings would also be helpful.

0 Stephen Smith27 over 4 years ago in reply to Ron Michallick

Prodigy 30 points

Hi Ron,

The parts are LM321MF, a 5 pin sot-23 type package. The boards are 1-3 years old. Top marking is A63A on all of the LM321 parts. I do not know if the are the /NOPB option or not. Thanks for any help.

Steve

0 Ron Michallick over 4 years ago in reply to Stephen Smith27

TI__Guru*** 140026 points

Steve,

Unfortunately the marking on the bottom is needed to find the date code. LM321MF/NOPB was RoHS in 2007, however the LM321MF is not RoHS even today. There is no obvious way to tell if the devices on board are /NOPB or not as the top marking is the same. With the bottom marking, I may be able to find out the full part number.

0 Stephen Smith27 over 4 years ago in reply to Ron Michallick

Prodigy 30 points

Thanks Ron,

We will assume not RoHS at this point as I do not see the /NOPB references in sourcing documents.

Best Regards

Amplifiers

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LM321: Markings to ID RoHS or non-RoHS part