BUY DM74LS14M https://www.utsource.net/itm/p/344958.html
Hex Inverter with Schmitt Trigger Inputs
Description: Hex Schmitt Trigger Inverter Features: Schmitt trigger action on all inputs Outputs source/sink 24mA Fanout of 2 LS-TTL loads Inputs compatible with TTL levels Outputs directly interface to CMOS, NMOS and TTL Operating voltage range: 3.0 to 18V Operating temperature range: -55°C to 125°C Application: The DM74LS14M Hex Schmitt Trigger Inverter is used in applications such as logic level conversion, waveform shaping, clock generation, and signal buffering. It is also used in digital logic circuits, such as counters, shift registers, and other digital logic devices. (For reference only)