BUY DM74LS14N https://www.utsource.net/itm/p/11215484.html
IC INVERTER SCHMITT 6CH 14DIP
Description: The DM74LS14N is a Hex Inverter Schmitt Trigger with open-collector outputs. Features: Inputs Accept Voltages to 5.5V Outputs Can Drive Up to 10 LSTTL Loads Low Power Consumption, 20-μA Max ICC Typical tpd = 8 ns ±4-mA Output Drive at 5V Low Input Current of 1 μA Max Schmitt Trigger Action for Noise Immunity Applications: Waveform Generation Clock Oscillators Timing Circuits Pulse Generators Level Translators Memory Address Selection Data Communication Line Receivers (For reference only)