The ChannelSelect and Enable inputs are compatible with TTLtype input thresholds. The input protection circuitry on this device allows overvoltage tolerance on the input, allowing the device to be used as a logiclevel translator from 3.0V CMOS logic to 5.0V CMOS Logic or from 1.8V CMOS logic to 3.0V CMOS Logic while operating at the highervoltage power supply.