UPD411AC

4096-word by 1-bit high-reliability dynamic random-access memory (DRAM) integrated circuit constructed with a premium ceramic package to handle early microprocessor bus caching loops. | 22-Pin Ceramic DIP | Early 8-bit personal microcomputers, classic coin-operated arcade game mainboards, legacy industrial data logging rigs. | UPD411AC | None | None | NEC uPD411, uPD411A, D411AC, Intel 2107B, MK4096 | Retro Microcomputer Frame Restorer: Wired into an active S-100 bus expansion prototyping deck to act as an exact 4K storage replacement core, cleanly retrieving and holding active byte notes during diagnostic code execution sweeps. | NEC Electronics / Nippon Electric Co. Historic Memory Formats: This landmark high-voltage NMOS memory block was engineered by NEC to provide data bus format expansion and reliable state memory storage inside early automated computing networks and laboratory test benches.