I'm using a CD4504B level shifter to translate 5V signals to 12V.
However, the 5V power supply is not always present...
... and I have the impression that the device is doing stupid things (high power consumption, and output switching unexpectedly (at least it happened once...)).
Inputs are also not powered, but I have pull-downs on all the inputs, so I presume they should not disturb the CD4504B, but I can find no information about what is supposed to happen when VCC = 0 and VDD = 12V...
Does anyone know?
Thanks for your help!