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LSF0102-Q1: I want to change the I2C buffer (PCA9600). Used for Long distance I2C-bus communication.

Sekaihiroshi
Prodigy 10 points
Part Number: LSF0102-Q1
Other Parts Discussed in Thread: TCA39306-Q1, TCA9517-Q1

Hi,

I'm looking for an automotive I2C buffer.

I usually use PCA9600 (other company). But It's not an automotive.

Is [My choise] interchangeable with PCA9600?

[My choise]

1. LSF0102QDCURQ1 (TI)

2. TCA39306DCURQ1 (TI)

*Required Frequency : 1MHz

Or... Please Introduce TI products.

(PCA9600 Block Diagram)

Best regards,

  • 0
    Guru 257900 points

    The LSF0101-Q1 and TCA39306-Q1 are passive switches; they are intended only for voltage translation.

    The only automotive buffer is the TCA9517-Q1, which runs only at 400 kHz.

  • 0 in reply to Clemens Ladisch
    Prodigy 10 points

    Thank you for the reply.

    I confirmed that there are no problems with 400kHz.

     

    Please let me ask some additional question.

    about connection I2C buffer

    Q1. Is this possible? Connect with SDAB-SDAB(SCLB-SCLB), SDAA-SDAA(SCLA-SCLA).

    *reason : more better? make A(B) and A(B) the same.

    Q2. Is this possible? Connect TCA9517-Q1 to PCA9600.

    *reason : new borad [TCA9517-Q1]. old board [PCA9600]. 

    Best regards,

  • +1 in reply to Sekaihiroshi
    Guru 257900 points

    1. B-side ports have a voltage offset and must not be connected together.

    2. The PCA9600 has a voltage offset on the SX/SY pins. The TX/TY and RX/RY pins have no voltage offset and can be connected to the TCA9517-Q1's B-side pins.