XD82C55-5 – Programmable Peripheral Interface (PPI) – Xinluda

The Xinluda XD82C55-5 is a CMOS Programmable Peripheral Interface (PPI) compatible with the industry-standard 82C55A/8255A. It provides 24 programmable I/O lines arranged in three ports, in a DIP-40 package, with the “-5” 5 MHz speed grade.

The Xinluda XD82C55-5 is a CMOS Programmable Peripheral Interface (PPI) that is functionally compatible with the long-running, industry-standard 82C55A / 8255A family. It is a general-purpose, software-programmable parallel I/O device originally designed for 8080/8085-class microprocessor buses and widely reused today in legacy system maintenance, industrial controllers, instrumentation, and retro-computing designs. The “-5” suffix denotes the 5 MHz speed grade, matching the classic 8255A-5 / 82C55-5 timing rating.

The device organizes 24 programmable I/O pins into three 8-bit ports—Port A, Port B, and Port C—which may be individually programmed in two groups of 12. Each group is independently configurable in software, allowing the part to be tailored to a wide range of TTL-compatible interfacing tasks without external glue logic.

Key Features

• CMOS Programmable Peripheral Interface, compatible with the 82C55A / 8255A standard
• 24 programmable I/O pins organized as three 8-bit ports (Port A, Port B, Port C), individually programmable in two groups of 12
• Three operating modes: Mode 0 (basic input/output), Mode 1 (strobed input/output with handshaking), and Mode 2 (strobed bidirectional bus on Port A with Port C control/status)
• Direct bit set/reset capability on Port C
• Single 5 V supply operation
• “-5” speed grade rated for 5 MHz operation; supports no-wait-state operation with 80C86/80C88-class buses
• Fully TTL-compatible interface
• Pin compatible with the NMOS 8255A
• 40-pin DIP (DIP-40) package

Applications

• Legacy 8080/8085/8086-class microprocessor and microcontroller systems
• Industrial control and automation I/O boards
• Instrumentation and test equipment
• Parallel printer and keyboard/display interfacing
• Retro-computing and embedded system maintenance/repair
• General-purpose TTL-compatible digital I/O expansion

Why Source XD82C55-5 from Pacific Component Xchange

The XD82C55-5 and other 82C55A-class PPI devices are increasingly hard to find through authorized distribution, making them a common pain point for engineers maintaining or refurbishing legacy hardware. Pacific Component Xchange is an independent distributor that specializes in sourcing scarce, end-of-life, and hard-to-find interface devices and peripheral controllers like the XD82C55-5.

When you source the XD82C55-5 through Pacific Component Xchange, you gain access to our global supply network for obsolete and allocation-constrained parts, authenticity and quality verification, and worldwide shipping. Because this is a Request-For-Quote (RFQ) item, pricing and current stock are confirmed per inquiry. Submit an RFQ today and our sourcing team will respond with availability, lead time, and a competitive quote for your required quantity.