The RCA F104 is a vintage flat pack integrated circuit (IC) that was part of RCA’s early digital and linear semiconductor offerings, primarily used in high-reliability military and aerospace applications during the late 1960s and 1970s - Form Factor: The "flat pack" is a rectangular or square surface-mount package with leads extending horizontally from two opposing sides, parallel to the base. Construction: These ICs typically featured hermetically sealed ceramic or metal bodies to protect the internal silicon die from moisture and corrosion. Lead Count: RCA's flat packs from this era were commonly 14-lead configurations. Durability: They were designed for extreme environments, often rated for the military temperature range of -55°C to +125°C