BUY SN5404J https://www.utsource.net/itm/p/306340.html
These devices contain six independent inverters
SN5404J is a 14-pin dual 4-input NOR gate from Texas Instruments. It is part of the SN5400 series of TTL logic gates. Description: The SN5404J is a dual 4-input NOR gate with Schottky TTL (S-TTL) circuitry. It has two independent 4-input NOR gates with Schottky-clamped inputs to reduce power dissipation. Features: - Schottky TTL (S-TTL) circuitry - Low power dissipation - High noise immunity - High speed - Low input current Applications: - Logic gates - Flip-flops - Counters - Data selectors/multiplexers - Bus drivers - Decoders/demultiplexers (For reference only)