Vintage SEMI NP5SB 6445P IC Chip Purple Gold Ceramic CDIP-24 Rare Collectible

The chip features the stylistically blocky, retro "SEMI" logo. This signifies Semi Processes Inc. (SPI) (often abbreviated or marketed as SEMI), a boutique semiconductor manufacturer prominent in the late 1970s and 1980s. Unlike giants like Intel or AMD, SEMI specialized in custom fabrication, proprietary CMOS processes, second-sourcing established architectures, and high-reliability logic arrays.Part Code and Date CryptographyNP5SB: This is the primary internal designator or part family code. Given SEMI's focus on high-speed communications and data interfaces during the early-to-mid 1980s, chips of this form factor and style generally mapped to high-reliability military/aerospace logic devices, Early Static RAM (SRAM) memory interfaces, or specialized operational bus controllers.6445P: This is a manufacturing tracking stamp. The "P" corresponds to the assembly location in the Philippines, corroborating the silver-stamped marking on the underbelly of the ceramic package.