Hallo, all!
I have the device with standard digital lines 0...5 V.
But I have to receive/transmit data with levels of a signal 0...30 V in a parallel mode. Tell, please, a simple way of a signal level transformation. Thanks.
A Cmos logic IC has protective diodes at its inputs to prevent damage from static electricity. The diodes limit the input voltage to slightly above its supply voltage and to slightly below ground. If a single resistor is used to limit the current into the protective diodes then any high voltage input can be used.