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P82B715: P82B715

PHILIP HSU
Expert 1900 points
Part Number: P82B715

Hello.,

BUFFER IC VCC 3.3V

and MASTER is 3V,  I2C PULL-HIGH was 3V also

then through 715 to SLAVE side PULL-HIGH all 3.3V

is there any concern for the application, thanks

  • 0
    TI__Guru 62920 points

    Hi Philip,

    This isn't typical usage of the device, but it may work (especially given that the voltage difference is small and the bus voltages will not exceed VCC). We will examine this in more detail and get back to you later in the week to confirm.

    Max

  • 0 in reply to Miguel Robertson
    TI__Guru 53555 points

    Hi Philip,

    The P82B715 Lx and Ly connections are clamped at Vcc +.07v but are otherwise independent of the supply voltage. As long as the bus voltage does not exceed Vcc by this margin and Vcc is within the datasheet specifications, the device should operate as normal.

    Reduced performance will occur with Vcc < 4.5v. This mainly impacts the dynamic sink currents and requires accommodation for timing-critical designs. Let me know if you have any questions regarding this trait.

    Regards,

    Eric