P8085A - AMD - 3MHz Base Core Clock Frequency, High-Integration 8-Bit Monolithic

3MHz Base Core Clock Frequency, High-Integration 8-Bit Monolithic NMOS Microprocessor, Single 5.0V Unified Power Supply Rail, Multiplexed 8-Bit Data / Low-Address Bus Layout, Foundational 40-Pin Plastic Dual Inline Package (PDIP-40) Mechanical Layout, 64-Kilobyte (64KB) Maximum Direct External Memory Addressing Space, Four On-Chip Hardware Interrupt Pins (RST 5.5 / 6.5 / 7.5, TRAP), Built-In Serial Input Data (SID) and Serial Output Data (SOD) Logic Lines, Complete 100% Software Backward Compatibility with 8080A Instruction Sets, Next-Generation Embedded Automation and System Process Control Hub | High-efficiency vintage industrial-grade 8-bit monolithic central processing unit manufactured by Intel Corporation under foundational product architecture layout P8085A. Designed as a major architectural evolution over the legacy 8080 series, this chip integrates the functions of an external clock driver and system controller straight onto its single silicon substrate matrix, while shrinking operation down to a single +5V supply line. It features a multiplexed address/data bus string that frees up physical microchip pins, enabling the addition of dedicated serial I/O communication pathways and hardwired maskable priority interrupt channels to run peripheral sensors cleanly. Heavily implemented inside early programmable logic controllers (PLCs), point-of-sale (POS) terminal computers, automated lab analytics boxes, carrier telecommunication interfaces, and vintage electronic instruments. | Industry Exact Equivalents: Intel P8085A, AMD AM8085A, NEC μPD8085A, Toshiba TMP8085AP | Industry Functional Cross-References: Intel P8085A-2 (5MHz upgrade), 8085, Intel D8085A (Ceramic), National INS8085A, NTE7145 | Military Specification National Stock Number (NSN): 5962-01-082-2432 (Base 8085A Processor Grid Core Matrix) [1, 2, 3]