You are assuming that a powered-down device will have a well-defined (and preferably very high) resistance between the output and ground.
In general, this isn't true; if you apply a signal to a pin of an unpowered device, then undefined (and possibly damaging) things will happen; for example, the device may try to power itself up from that signal, in which case the current flow will be highly device-specific, with a very non-linear relationship to the applied voltage.
Just use an analog multiplexer.
In general, this isn't true; if you apply a signal to a pin of an unpowered device, then undefined (and possibly damaging) things will happen; for example, the device may try to power itself up from that signal, in which case the current flow will be highly device-specific, with a very non-linear relationship to the applied voltage.
Just use an analog multiplexer.
Statistics: Posted by jayben — Sat Jul 06, 2024 9:58 am
