BUY HEF4020BT https://www.utsource.net/itm/p/11563524.html

Description: HEF4020BT is a 14-pin CMOS logic integrated circuit (IC) manufactured by Philips. It is a dual 4-input NAND gate. Features: High noise immunity Low power consumption High speed operation Low input current Low input capacitance High output current High output voltage High fan-out Applications: Interface circuits Logic gates Flip-flops Counters Shift registers Multiplexers Decoders Data selectors Pulse generators Oscillators Waveform generators Signal processing circuits (For reference only)