XD71055 – Programmable Peripheral Interface (Parallel I/O) – Xinluda

The Xinluda XD71055 is a CMOS programmable peripheral interface (parallel interface unit) providing three 8-bit ports for 24 programmable I/O lines, functionally compatible with the industry-standard 8255 family. Available on an RFQ basis from Pacific Component Xchange.

The XD71055 from Xinluda (Shenzhen Xinluda Information Technology Co., Ltd.) is a CMOS programmable peripheral interface (PPI), also referred to as a parallel interface unit. It is a general-purpose programmable input/output device designed for use with 8080/8085-class and other common microprocessor and microcontroller systems, and it is functionally compatible with the widely deployed 8255 / 82C55 / NEC µPD71055 family of parallel interface units. This compatibility makes the XD71055 a practical alternative for designs that depend on the legacy 8255 architecture but require a current production source.

The device organizes its I/O into three 8-bit ports (Port A, Port B, and Port C), delivering 24 programmable I/O lines that can be configured by the host processor at run time. Port C can be split into two 4-bit nibbles, and individual bits can be set or reset for fine-grained control of status and handshake signals. Three programmable operating modes support basic input/output (Mode 0), strobed I/O with handshaking (Mode 1), and bidirectional bus operation (Mode 2), giving designers flexible parallel data transfer. Inputs and outputs are TTL-compatible.

Key Features

• 8255-compatible programmable peripheral interface / parallel interface unit
• Three 8-bit I/O ports (Port A, Port B, Port C) for 24 programmable I/O lines
• Three programmable operating modes (Mode 0 basic I/O, Mode 1 strobed I/O, Mode 2 bidirectional bus)
• Port C bit set/reset capability for status and handshake control
• TTL-compatible inputs and outputs
• CMOS technology
• Designed for 8080/8085-class and general microprocessor/microcontroller systems
• DIP-40 package

Applications

• Microprocessor and microcontroller parallel I/O expansion
• Industrial control and automation interface boards
• Keyboard, switch, and display interfacing
• Printer and peripheral handshaking interfaces
• Legacy 8255-based system maintenance and replacement
• Data acquisition and instrumentation I/O

Why Source XD71055 from Pacific Component Xchange

The XD71055 is a specialized interface IC with little to no authorized-distributor stock, which makes it difficult to source through conventional channels. Pacific Component Xchange is an independent distributor focused on hard-to-find and end-of-life interface devices, power-management ICs, and other scarce components. We help engineers and procurement teams secure obsolete and allocation-constrained parts like the XD71055 with attention to authenticity and traceability, and we ship globally to keep your production lines and service operations running.

Pricing for the XD71055 is provided on a request-for-quote basis. Contact Pacific Component Xchange today to request a quote, confirm current availability, and discuss your quantity, date-code, and packaging requirements.