SGS - Z8420B1 - IC. Z80 PIO Parallel Input/Output Controller, 40 DIP. Removed from Equipment / Used.

SGS - Z8420B1 - IC. Z80 PIO Parallel Input/Output Controller, 40 DIP. Removed from Equipment / Used. The Z8420B1 is an integrated circuit, specifically a Z80 PIO (Parallel Input/Output) Controller manufactured by SGS-Thomson (now STMicroelectronics). It is part of the Z80 microprocessor family, designed to interface peripheral devices directly to the Z80 CPU. • Function: It is a programmable parallel input/output controller that allows the Z80 CPU to communicate with external devices (like printers or keyboards) without requiring additional external logic. • Package: It comes in a 40-pin Dual In-Line Package (DIP40). • Manufacturer: SGS-Thomson Microelectronics. • Key Features: It features two 8-bit ports (Port A and Port B) for bidirectional data transfer. • Applications: It is commonly used in vintage computer systems, embedded systems, and industrial equipment based on the Z80 architecture.