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ISO7330FC: Vih and supply voltage

D3j4nHr01
Intellectual 410 points
Part Number: ISO7330FC
Other Parts Discussed in Thread: ISO7730

Tool/software:

Hello,

I'm using ISO7330FCDW to isolate PWM signals. I'm using 5 V for VCC1, ampitude of PWM signals (connected to IN inputs of the ISO7330FCDW) is 3.3 V. In datasheet's section 6.3 is written that Vih is minimum 2 V. Since, there is not mentioned for which supply voltage is Vih minimum 2 V, can I assume that this applies for whole valid range of recommended supply voltage which equals 3 - 5 V?

Many thanks,
Kind regards,
Dejan.

  • +1
    TI__Mastermind 18745 points

    Hello,

    Thank you for your question.

    D3j4nHr01 said:
    Since, there is not mentioned for which supply voltage is Vih minimum 2 V, can I assume that this applies for whole valid range of recommended supply voltage which equals 3 - 5 V?

    Yes, the VIH and VIL values in the recommended operating conditions apply to the entire range of the recommended supply voltage. The ISO7330 device uses TTL based inputs since the device uses edge-based technology. Due to this, devices with TTL-based inputs will have a fixed VIH and VIL threshold.

    We highly recommend using one of our newer devices since the ISO7330 device is an older device in our line-up. We currently offer newer CMOS based devices, such as the ISO7730, which is one of our newest and popular devices we currently offer.

    Regards,
    Aaditya Vittal