BUY HEF4093BT https://www.utsource.net/itm/p/11222999.html

Description: Quad 2-Input NAND Schmitt Trigger Features: - High noise immunity - High gain - Low power consumption - High speed - Low input current - High input impedance - Output compatible with TTL, MOS and CMOS Applications: - Clock generators - Pulse shapers - Timers - Pulse width modulators - Frequency dividers - Logic gates - Flip-flops - Shift registers - Data selectors/multiplexers (For reference only)