The sample circuit has a pull-up resistor because the idle state of a UART line is high.
If you are using a different protocol where you want the default state to be low, then use a pull-down resistor (or rely on the ISO7631FC's internal pull-down current…
Yes, you should not use ISO721 if your application requires 1200Vpk continuous operating voltage between input and output sides.
We don't have a single channel isolator with 1200Vpk working voltage but we have 2, 3, and 4 channel isolators that meet this…
Hi Natallia,
ISO7231C is a failsafe high part. Its outputs go to high when the input side power is lost. This may be the reason why you are seeing the output (high?) pulse of 1 or 2 msec duration. Though I am not sure why the pulse is going low again…
Quickly find solutions to common questions about digital isolator devices by clicking this link. This FAQ answers the most common questions asked about these devices …… ……… …
FAQ: Isolation >> Digital Isol…
