The NL17SH14 is a single gate CMOS Schmitt trigger inverter fabricated with silicon gate CMOS technology. The internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output. The NL17SH14 input structure provides protection when voltages up to 7 V are applied, regardless of the supply voltage. This allows the NL17SH14 to be used to interface 5 V circuits to 3 V circuits. The NL17SH14 can be used to enhance noise immunity or to square up slowly changing waveforms.