HD6821P-DIP, Peripheral Interface Adapter (PIA) - 8-bit, 40-Pin DIP Package for Microprocessor-Based Systems

The HD6821P Peripheral Interface Adapter (PIA) is a versatile 8-bit interface device designed to connect microprocessors with peripheral devices in microprocessor-based systems. This 40-pin DIP package features two bidirectional 8-bit peripheral data buses and four programmable control or interrupt lines, offering comprehensive support for both input and output operations. The PIA can operate as an interface between the MPU and external peripherals, allowing for a variety of operational modes with high flexibility.

It is fully compatible with NMOS and CMOS technologies, ensuring seamless integration across different applications. The HD6821P also includes two programmable data direction registers, a handshake control logic, and high-impedance 3-state outputs, making it ideal for a wide range of embedded applications and microprocessor-based designs that require robust and efficient communication with peripherals. Additionally, it operates within a temperature range of -20°C to +75°C, providing reliability in various environments.

• Two 8-bit bidirectional data buses for interfacing peripherals.
• Four individually controlled interrupt input lines.
• High-impedance 3-state outputs for efficient driving.
• Fully compatible with HD6301/HD6303 microprocessors.
• Dual port, programmable direction registers.
• Operates over a wide temperature range (-20°C to +75°C).