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BQ25731: MSL2 BQ25731 was delivered, not listed on the data sheet

Shinichi Inoue
Guru 22016 points
Part Number: BQ25731


Tool/software:

Dear Specialists,

My customer is using BQ25731 and has a question.

The BQ25731RSNR was delivered in a package containing a mixture of reels with two MSL markings (MSL1, MSL2).

I would be grateful if you could advise.

---Question

Our site received a mixed shipment of BQ25731RSNR reels with two MSL markings (MSL1, MSL2).

The data sheet states only MSL1 and MSL2 does not exist.

We have not received a PCN.

Could you please let us know why an MSL2 product exists and were delivered to us.

Also could you please let us know that it is correct that reels with different MSL markings are mixed together when they are delivered together as the same part.

---

I appreciate your great help in advance.

Best regards,

Shinichi

  • 0
    TI__Mastermind 35345 points

    Hi, Shinichi,

    I think TI has recently qualified TI parts from MSL2 to MSL1. In the transition, we may have both products existing. I don't think this will affect any function, but simply how to store the devices and how long is the shelf time. 

    Regards,

    Tiger

  • 0 in reply to Tiger Zhou
    Guru 22016 points

    Hi Tiger,

    Thank you for your reply.

    I understand.

    Since the part was recently changed from MSL2 to MSL1, there is a possibility that MSL2 will be delivered with MSL1.

    Could you please let us know questions listed below.

    ---

    When did the part change from MSL2 to MSL1?

    Please provide the document that confirms the change.

    I can't confirm it in the datasheet (SLUSE66A).

    ---

    I appreciate your great help and cooperation.

    Best regards,

    Shinichi

  • 0 in reply to Shinichi Inoue
    TI__Mastermind 35345 points

    See answer in a similar thread. 

    e2e.ti.com/.../tps62745-msl-of-tps62745dssr

    Excerpted as below. 

    "PCN is only required for any MSL downgrade per QSS009-043. MSL 2 to MSL1 is an improvement on the floor life after the bag is opened from 1 year to unlimited per J-STD-020E. MSL upgrade has been taking place for years and has never resulted in a PCN.
    MSL change happened around Sep/2023 timeframe."

  • 0 in reply to Tiger Zhou
    Guru 22016 points

    Hi Tiger,

    Thank you for your reply.

    I understand the situation.

    I'll share the customer.

    When the customer has an additional question, I consult you again.

    I appreciate your great help and cooperation.

    Best regards.

    Shinichi