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I2C one channel extend two channels and have level conversion

Cooper Zhang1
Expert 2190 points
Other Parts Discussed in Thread: PCA9543A, TCA9543A

Dear:

Does Ti have I2C one channel extend two channels and have level conversion chip ? can you give me promotion ?

  • 0
    Guru 287370 points

    I guess you want the TCA9543A (or the older PCA9543A):

    "The TCA9543A is a dual bidirectional translating switch controlled by the I²C bus. The SCL/SDA upstream pair fans out to two downstream pairs, or channels. Either individual SCn/SDn channel or both channels can be selected, determined by the contents of the programmable control register. […]
    The pass gates of the switches are constructed such that the VCC terminal can be used to limit the maximum high voltage, which will be passed by the TCA9543A. This allows the use of different bus voltages on each pair."