SN7403N

Quadruple 2-Input Positive-NAND Gate with Open-Collector Outputs, standard 14-pin plastic dual-in-line package footprint manufactured by Texas Instruments. Allows direct wire-ANDing output flexibility across shared lines for custom logic routing while providing basic logical gating. Applied to interface distinct logic systems, drive small indicators, and handle multi-source bus configurations. Industry exact equivalents include Signetics N7403N, Fairchild DM7403N, Motorola MC7403N, and NTE7403. Historical equipment applications include Bally Xenon sound modules, Atari Pong systems, Sequential Circuits Prophet-5 synthesizers, Wurlitzer OMT assemblies, and Williams Flash Gordon pinball tables.