AT29C040A-90PI:Configuration, function, application field


The AT29C040A-90PI is a specific product identifier for a 4-megabit (512K x 8) parallel Flash Memory IC manufactured by Microchip Technology. Here is an overview of its configuration, function, and potential application fields:



  • Memory Size: The AT29C040A-90PI has a memory size of 4 megabits, organized as 512 kilobytes with 8 bits per byte.
  • Interface: It features a parallel interface, which allows for high-speed data transfer but typically requires more pins for connection compared to serial interfaces.
  • Operating Voltage: Operates within standard digital voltage levels specified in the datasheet.
  • DataSheet

    AT29C040A-90PI PDF


  • Programmable Memory: The device provides non-volatile memory storage where data can be written and retained even when power is removed.
  • Parallel Interface: Data transfer occurs in parallel, enabling faster read and write speeds compared to serial interfaces.
  • Read and Write Operations: The Flash memory supports both read and write operations, allowing for data storage and retrieval operations as required.
  • Erasing Capability: The memory can be erased and reprogrammed electrically, providing flexibility in storing and modifying data.

Application Field:

  • Embedded Systems: Commonly used in embedded systems for storing program firmware, bootloaders, configuration data, and critical parameters.
  • Telecommunications: Found in networking devices, telecommunications equipment, and infrastructure for storing firmware, settings, and configuration data.
  • Industrial Automation: Utilized in industrial control systems, automation equipment, and PLCs for configuration storage, program memory, and data logging.
  • Consumer Electronics: Used in various consumer electronics devices such as audio players, gaming consoles, and set-top boxes for program storage and data retention.
  • Automotive Electronics: Applied in automotive systems for storing firmware, diagnostic data, calibration settings, and other critical information.


  • Configuration typically involves addressing specific memory locations and programming data in a parallel manner.
  • Functions include reliable storage and retrieval of data within electronic systems, especially for program storage and critical parameters.
  • The application fields mentioned are common areas where such Flash memory ICs are utilized, but actual applications can vary based on specific design requirements.

For detailed technical specifications, usage guidelines, and application notes, it is recommended to refer to the official datasheet and technical documentation provided by the manufacturer (Microchip Technology). Additionally, consulting Microchip's technical support resources can provide further insights into the optimal utilization of the AT29C040A-90PI Flash memory in various electronic systems.