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Original question:

LM2904: Difference between LM2904PWR-JF and LM2904PWR

LM2904: Difference between LM2904PSR-JF and LM2904PSR

Shinichi Inoue
Guru 21686 points
Part Number: LM2904

Dear Specialists,

My customer'd like to know the difference between LM2904PSR-JF and LM2904PSR.

I would be grateful if you could advise.

I found a thread of the difference between LM2904PWR-JF and LM2904PWR.

Is it the same as the difference between LM2904PWR-JF and LM2904PWR? 


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It is only distributed in Japan.

The JF typically has lower supply current and less phase margin in some unity gain circuits.

The part number has specific silicon die revision.

It would recommend changing to LM2904BIPWR instead. It is more stable and has better sink current than JF. 

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I appreciate your great help in advance.

Best regards,

Shinichi

  • 0
    TI__Guru**** 164976 points

    Hello Shinichi-san,

    The same advice applies to all packages of -JF. 

  • 0 in reply to Ron Michallick
    Guru 21686 points

    Hi Ron,

    Thank you for your reply.

    I understand the difference between LM2904NSR-JF and LM2904NST is the same as LM2904PWR-JF and LM2904PWR.

    I'd like to confirm the LM2904-JF datasheet, but I couldn't find.

    I have to explain the customer the difference of the spec between LM2904NSR-JF and LM2904NSR in detail. 

    Could you please provide the LM2904NSR-JF datasheet with us.

    Or could you provide the difference of the spec supply current, phase margin, sink current in detail.

     I appreciate your great help and cooperation.

    Best regards,

    Shinichi

  • 0 in reply to Shinichi Inoue
    TI__Guru**** 164976 points

    Shinichi,

    There is no JF data sheet. It has the same specifications as non JF

    In 2006, I personally noticed lower supply current (temperature was 0C)

    JF was less current for low VOL range, curves in red circle. LM2904B is even higher low VOH current (not on this chart) The jump up occurs further to the right

    J oscillated with less direct output capacitance more series resistance was needed to make that stop

  • 0 in reply to Ron Michallick
    Guru 21686 points

    Hi Ron,

    Thank you for your reply.

    These are very helpful information.

    I'd like to confirm about sink current VOH.

    I understand Red circle has 4 line for JF.

    On the other hand, are lines of navy blue and blue for non JF?

    Also, could you please suggest each of Vcc voltage.(Could you please see attached figure)

     ...

    I appreciate your great help and cooperation.

    Best regards,

    Shinichi

  • 0 in reply to Shinichi Inoue
    Guru 21686 points

    Hi Ron,

    This is a Figure Output Sinking Characteristics of LM2904.

    It is described each of Vcc.

    Best regards,

    Shinichi

  • 0 in reply to Shinichi Inoue
    TI__Mastermind 32941 points

    Shinichi-san,

    Ron is out of office for this week, and will return on the 21st of March.

    In the mean time I can do my best to answer your questions. I'm not certain what the supply voltage was of the tested units. I'm assuming the blue and navy blue lines are both channels of a non-JF device. The multiple lines in the red circles are probably multiple JF devices tested. However I would expect the JF device to shift across supply voltage similarly to the non-JF devices.

    Best,
    Jerry

  • 0 in reply to Gerasimos Madalvanos
    Guru 21686 points

    Hi Jerry,

    Thank you for your reply.

    I understand supply voltage is uncertain and blue and navy blue line is probably non JF.

    I'll share this information with the customer.

    When they have an additional question, I consult you again.

    I appreciate your great help and cooperation.

    Best regards,

    Shinichi