Series USART, PLL & Early 7400 Logic Lot (19 Pieces)

This lot is a phenomenal find for arcade PCB programmers, retro-computing hobbyists, modular synthesizer builders, and vintage communications technicians who need original, high-quality 1970s and 1980s Signetics legacy silicon to match original factory schematics.

Signetics 2661 Series USARTs (12x). Features a massive matching cluster of SCN2661C, SCN2661A, and early 2661-3 N programmable communications interfaces (displaying clean 1983 and 1981 date codes). Signetics NE560N PLL: Includes a rare 1976 phase-locked loop IC highly sought after for legacy audio tracking and signal decoding pathways.

Contains rare 1974 and 1975 monostable multivibrators / timers (N74121 and N74123) and foundational logic gates (N7400A, N7402A, N74175) essential for Golden Age coin-op circuitry.

The components in this inventory have been preserved inside high-grade rigid plastic carrier frames, featuring classic name brands like Augat, Robinson Nugent (RN), and vintage Clover housings.

This secure nesting completely isolates the legs, guaranteeing all chips arrive with 100% straight, clean, and unbent pins ready for direct drop-in socket or circuit board installation. Sold strictly AS-IS due to the delicate vintage nature of legacy components.