Hi,
a customer of mine plans to use ISOW7841 to isolate a RS-485 interface. To optimize operation and EMI behavior, customer follows the recommendations provided in the low-emissions application report:
Customer is concerned about the overall current consumption. They plan to switch ISOW7841 off when the interface is not used.
What do they need to consider when cutting VCC supply? The corresponding MOSFET will leave decoupling capacitors connected to VCC.
Do they need to open the input signals as well? Looking at the Abs Max specification in the datasheet, I assume that these need to be either tied low or floating/disconnected from a driver.
VCC will be 5V.
Thanks and best regards,
Phil