BUY SN7413N https://www.utsource.net/itm/p/1716376.html
DUAL 4-INPUT POSITIVE-NAND SCHMITT TRIGGERS
Description: The SN7413N is a quad 2-input NAND Schmitt trigger gate in a 14-pin DIP package from Texas Instruments. Features: Low Input Current: 1 μA High Noise Immunity Schmitt-Trigger Action Inputs Compatible With Most Logic Families Outputs Source/Sink 24 mA Outputs Directly Interface to CMOS, NMOS, and TTL Outputs Can Drive LEDs Directly Operating Voltage Range: 3 V to 15 V Applications: Clock Generators Pulse Generators Timing Circuits Waveform Generators Digital Logic Circuits Digital Counters Flip-Flops Data Selectors/Multiplexers (For reference only)