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LSF0204: Need P2P recommend solution to replace NXP NTX0104 and UM3204QT

Statham Su
Genius 4990 points
Part Number: LSF0204
Other Parts Discussed in Thread: TXS0104E, TXB0104, TXU0304,

Hello Sir:

Do you have solutions to replace NXS0104GU12 or UM3204QT?

https://assets.nexperia.com/documents/data-sheet/NXS0104.pdf

http://www.union-ic.com/Upload/Datasheet/Datasheet_UM3204_Rev13.pdf

We have around 500~600kpcs/year opps on it. 

Please kindly provide your recommendations for us.

Thanks a lot.

  • 0
    TI__Guru 50496 points

    Hi Statham,

    Thanks for reaching out. TXS0104E is the P2P recommendation, thanks.

    Best Regards,

    Michael.

  • 0 in reply to Michael Ikwuyum
    Genius 4990 points

    Hi Michael:

    Package is the key point.

    Customer is using XQFN12 (NXP name).

    Please kindly check it again.

    Thanks a lot.

  • 0 in reply to Statham Su
    TI__Guru 50496 points

    Hi Statham,

    The device has similar architecture as the TXS family. Unfortunately, the below are the package options we can replace with TXS.

    Could you help clarify the application type (push-pull/open-drain), signal (I2C/SPI etc) to help recommend another suitable device for the package of interest (TXB0104 or TXU0304 as shown below for example)?

    Best Regards,

    Michael.

  • 0 in reply to Michael Ikwuyum
    Genius 4990 points

    Hi Michael:

    I double confirm with customer, their application are both I2C and SPI.

    And NXS0104 has internal pull up 10Kohm, but TXB0104 and LSF0204 has no pull up resistance inside.

    Customer needs to modify PCBA, please recommend other solutions which has pull up resistance inside for us.

    Thanks a lot.

  • 0 in reply to Statham Su
    TI__Guru 50496 points

    Hi Statham,

    Correct me if I am wrong, but customer is using external pull-ups with the I2C application, as this is how the application typically works.

    Hence, LSF would would work just fine with existing external pull-ups. TXS works where external pull-ups may not be necessary (customers save on BOM) as the pull-ups would lead towards a voltage divider with the existing internal 10K for a higher VOL. See Effects of Pull-ups on TXS.

    Statham Su said:
    I double confirm with customer, their application are both I2C and SPI.

    For I2C, the recommendation is LSF/ TXS (where external pull-ups may be unnecessary).

    For SPI, the recommendation is TXB, thanks.

    Best Regards,

    Michael.