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  • ISO1641: ISO1641 pull-up resistor time constant check for 1 MHz SWD signals

    TI Thinks Resolved
    Part Number: ISO1641 Hello, We are using ISO1641BDR to isolate an SWD program download interface (SWDIO and SWCLK), as shown in the attached schematic. Signal line speed (SWDIO/SWCLK): 1 MHz ISO1641 maximum I2C operating frequency: 1.7 MHz …

  • ISO1641: ISO1641 certification status (UL/IEC) – datasheet shows “pending”, please confirm latest

    TI Thinks Resolved
    Part Number: ISO1641 Hi, ISO1641 datasheet indicates that certifications are pending. Could you please let us know the current certification status for UL and IEC standards? Thanks, Conor

  • ISO1641: How to share schematic and PCB files privately for review

    TI Thinks Resolved
    Part Number: ISO1641 Hello, We would like TI to review our schematic and PCB layout, but our customer does not want the design files to be made public. Could you please let us know how we can send the files to you privately? Thank you.

  • 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: Do you have any I2C isolator parts that have VOL = 400mV max

    TI Thinks Resolved
    Part Number: ISO1641 Other Parts Discussed in Thread: TCA9517 , , LP5569 , ISO7731 , ISO6041 e2e, I noticed the ISO164x series has a VOL1 = 650mV (nom), 710mV (max). Do you have any I2C isolator parts that have VOL = 400mV max. For instance, this part…

  • 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…
    • 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

  • 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…

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