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IS82C55AZ from INTERSIL

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IS82C55AZ

Manufacturer: INTERSIL

CMOS Programmable Peripheral Interface

Partnumber Manufacturer Quantity Availability
IS82C55AZ INTERSIL 524 In Stock

Description and Introduction

CMOS Programmable Peripheral Interface The IS82C55AZ is a CMOS Programmable Peripheral Interface (PPI) chip manufactured by Intersil (now Renesas Electronics). Below are its key specifications, descriptions, and features:

### **Manufacturer Specifications:**
- **Manufacturer:** Intersil (now part of Renesas Electronics)
- **Technology:** CMOS
- **Operating Voltage:** 4.5V to 5.5V
- **Operating Temperature Range:** -40°C to +85°C (Industrial Grade)
- **Package:** 44-Pin PLCC (Plastic Leaded Chip Carrier)
- **Speed:** Compatible with 8MHz and higher microprocessors

### **Descriptions:**
- The IS82C55AZ is a general-purpose programmable I/O device designed for use with microprocessors.
- It provides 24 I/O pins, which can be individually programmed in different modes.
- It is functionally compatible with the Intel 8255A but built with CMOS technology for lower power consumption.

### **Features:**
1. **Three 8-bit I/O Ports (Port A, Port B, Port C):**
   - Port A and Port B are 8-bit ports.
   - Port C can be split into two 4-bit ports (Upper and Lower).
2. **Programmable Modes:**
   - **Mode 0 (Basic Input/Output):** Simple I/O operation.
   - **Mode 1 (Strobed Input/Output):** Handshake-based data transfer.
   - **Mode 2 (Bidirectional Bus):** Allows bidirectional data transfer (only Port A).
3. **Low Power Consumption:** CMOS technology ensures reduced power usage.
4. **TTL Compatibility:** All inputs and outputs are TTL-compatible.
5. **Bit Set/Reset Capability:** Individual bits of Port C can be set or reset.
6. **Enhanced Noise Immunity:** Designed for industrial environments.
7. **Direct Bit Manipulation:** Allows control of single I/O lines.

This chip is commonly used in embedded systems, industrial control, and microprocessor-based applications for interfacing peripherals.

Application Scenarios & Design Considerations

CMOS Programmable Peripheral Interface

Alternative Part Number

  • CP82C55A --: Same 82C55A CMOS programmable peripheral interface in a different package/prefix, functionally equivalent and widely available.
  • 8255AC-5 --: Original NMOS 8255A PPI from the originator of the architecture, pin and function compatible with the 82C55A.
  • W82C55A --: Second-source CMOS 8255A-compatible PPI with equivalent functionality and timing, suitable as a drop-in replacement.
  • HD63C55 --: CMOS programmable peripheral interface equivalent to the 8255A, drop-in compatible for most designs with similar electrical characteristics.

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