The STMicroelectronics M27C512-12FI is a 512 Kbit UV-erasable and OTP EPROM memory (64K × 8) in a 28-pin ceramic DIP with a quartz window (FDIP28W) and a parallel interface. It operates at 5 V ±10% with a 12.75 V programming voltage, 120 ns access time, and an operating temperature range of 0°C to +70°C. Used across industrial electronics and embedded systems, it is commonly found in PLCs, CNC machines, arcade systems, and telecommunications equipment for permanent firmware or configuration storage; this part is obsolete and no longer manufactured (lifecycle status: Obsolete / No Longer Manufactured).
