.OA File

.oa is OrCAD PCB Designer OpenAccess database

Features Description
File Extension .oa
Format N/A
Created by Cadence Design Systems
Category Various data

The .oa file extension is associated with OpenAccess, an API (Application Programming Interface) and a C++ program interface used for managing and accessing integrated circuit (IC) design data. It is commonly utilized by various PCB design applications in the semiconductor industry.


The development of OpenAccess can be traced back to the late 1990s when it was created by Cadence Design Systems, a leading provider of electronic design automation (EDA) software. OpenAccess aimed to address the need for a standardized and vendor-neutral format for representing IC design data, enabling interoperability between different EDA tools and facilitating collaboration among designers and engineers.


The .oa file extension represents a file that contains IC design data stored in the OpenAccess format. These files typically include information such as the layout, schematics, physical properties, and connectivity details of an integrated circuit design. The OpenAccess format provides a comprehensive and structured representation of the IC design data, allowing EDA tools to efficiently access and manipulate the information.

PCB design applications and other EDA tools use the OpenAccess API to read, modify, and write .oa files. The API enables seamless integration of various design tools, allowing designers to work on different aspects of the IC design process while maintaining data consistency and integrity.

Published Specifications

The OpenAccess format is governed by a set of specifications and guidelines established by the Silicon Integration Initiative (Si2), an industry consortium focused on developing and promoting open standards for electronic design automation. The detailed specifications for the .oa file format are publicly available through the Si2 website and provide insights into the internal structure and organization of the data stored within these files.

How to Open and Use?

To open and use .oa files, you will need a PCB design application or an EDA tool that supports the OpenAccess format. These tools typically provide built-in functionality to import, manipulate, and export .oa files. Follow these steps:

  1. Launch the PCB design application or the relevant EDA tool.
  2. Navigate to the file menu or import section.
  3. Select the option to import or open an .oa file.
  4. Locate and select the desired .oa file from your computer.
  5. Follow the tool-specific instructions to work with the IC design data contained in the .oa file.

How to Convert?

Converting .oa files to other formats may not be a straightforward process, as the OpenAccess format is specifically designed to store and represent IC design data. However, some PCB design applications or EDA tools may provide options to export the design data in different formats, such as GDSII or ODB++, which are commonly used for data exchange between different design tools and manufacturing processes. To convert .oa files:

  1. Open the PCB design application or the relevant EDA tool.
  2. Load the .oa file containing the IC design data.
  3. Navigate to the file menu or export section.
  4. Select the desired export format (e.g., GDSII, ODB++, etc.).
  5. Follow the tool-specific instructions to complete the export process.

Is the File Safe, a Virus, or a Spy?

The .oa file extension itself is not inherently unsafe, a virus, or a spy. It is a standardized format used for storing IC design data in the semiconductor industry. However, it is essential to exercise caution when handling .oa files obtained from untrusted sources. Always ensure that you have obtained the .oa files from reputable and trusted sources to mitigate the risk of potential security threats.


Cadence Design Systems

Various data


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