SN74LS398N

Quadruple 2-Input Multiplexer with Storage Register Latches, standard 16-pin plastic dual-in-line package footprint. Implements an explicit three-state output architecture over standard register cells to handle high-density data bus isolation tasks natively. Applied in high-performance arithmetic blocks, shift register expansions, temporary caching arrays, and dual-source data controllers. Industry exact equivalents include Texas Instruments SN74LS398N, Motorola MC74LS398N, Fairchild DM74LS398N, and specialized bus logic arrays. Historical equipment applications include Atari Trongame inputs, Seeburg FC1 logic matrices, Oberheim Eight Voice synths, Bally Eight Ball Deluxepinball, and Williams Defender units.