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  • ISO1641: SDA1, SCL1 pull-up voltage

    TI Thinks Resolved
    Part Number: ISO1641 Other Parts Discussed in Thread: ISO1640 Tool/software: Hi Is it okay to evaluate I2C communication with VCC1 set to 5V and SCL1 and SDA1 pulled up to 3.3V? I have created a board containing an isolated power supply, ADC, sensor,…

  • ISO1641: output buffer voltage of ISO1641 is high as a risk

    TI Thinks Resolved
    Part Number: ISO1641 Other Parts Discussed in Thread: TCA9800 , Hi team, customer Master SOC VIL is 0.54V, so they think our buffer output 0.65V (VoL1) is too high to be read correctly , is there any workaround we can do to lower down this 0.65V…

  • ISO1641: SCL not consistently passing from side 1 to side 2

    TI Thinks Resolved
    Part Number: ISO1641 Tool/software: Hello, We are using the ISO1641 in an I2C level translation application with Side 1 at 3.3 V and side 2 at 5V. We do not need the isolation feature, so the grounds on both sides of the device are tied to our common…

  • TCA9802: Problem when connected to ISO1641: low state is not correctly transferred from side B to A

    TI Thinks Resolved
    Part Number: TCA9802 Other Parts Discussed in Thread: ISO1641 , TCA9509 Tool/software: We have processor driving side A of TCA9802 (2.2k pullups). Then side B of TCA9802 is connected to ISO1641 (side 1) - no other I2C device. Side 2 of ISO1641 is…

  • ISO1641: is somehow more robust for applications that do not need the bidirectional clock vs ISO1640

    TI Thinks Resolved
    Part Number: ISO1641 Other Parts Discussed in Thread: ISO1640 , Tool/software: e2e, I missed we couldn't support clock stretching with the ISO1641BDR and would appreciate some input on whether the ISO1641BDR is somehow more robust for applications…

  • ISO1641: Hot Plugging Waveforms

    TI Thinks Resolved
    Part Number: ISO1641 Other Parts Discussed in Thread: TCA9511A , TCA4307 , Hello, The system I have is a back-plane board where power modules can hot plug into. Below screen shot is triggered on the hot-plug event. Blue trace is I2C bus side SDA…

  • ISO1641: ISO1641B: SCL signals clipping

    Part Number: ISO1641 Other Parts Discussed in Thread: ISO1640 Hi, we're trying the isolator ISO1641B to isolate I2C communication. Below is the schematic: As the test circuit, both the master and slave devices are Arduino Uno operating at 5V. We…
    • Answered

  • ISO1641: Voltage Input threashold values correct?

    Resolved
    Part Number: ISO1641 Hello Team, My customer found a confusing specification in our datasheet. We have the following specification: I f I see this correctly, then the threshold where we recognize high and low could possibly overlap, namely…
    • Resolved
    • Answered

  • ISO1641: Do we need a buffer between INA237 and ISO1641

    Resolved
    Part Number: ISO1641 Other Parts Discussed in Thread: INA237 , , ISO1640 , INA226 , TCA9517A , TCA9800 Hi Team, We want to use I2C to output power telemetry data. But checked their H/L threshold voltage, INA237 consider 0 - 0.4 V as L. Will ISO1641…
    • Resolved
    • Answered

  • ISO1641: Not Getting Pulled Down to Zero

    Resolved
    Part Number: ISO1641 Hello, We have implemented an isolated I2C Bus using ISO1641BDR. Communication works properly. No communication errors are occurring says our FW team. Not sure why the image below is so hazy; But, the Yellow trace is micro…
    • Resolved

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