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During this era, the software gained a reputation for having a highly efficient router and a user-friendly interface that relied heavily on keyboard macros (many of which are still supported in the software today as "Modeless Commands").
If you are currently managing legacy design files or planning a system upgrade, knowing where your datasets fall on this timeline is essential for planning smooth file conversions, library migrations, and tool training.
The history of PADS (Personal Automated Design System) is a decades-long journey that mirrors the evolution of the entire electronic design automation (EDA) industry. From its origins as a budget-friendly DOS application to its current status as a sophisticated suite under Siemens, PADS has remained a staple for independent engineers and small-to-medium design teams. 1. The Early Era: PADS-PCB and the DOS Roots (1985–1990s)
The Mentor Graphics PADS version history demonstrates a clear trajectory from traditional desktop PCB design to a modern, cloud-enabled, and highly collaborative platform. Whether you are using PADS Standard or PADS Professional, the VX series offers significant advantages in productivity and design quality.
This era focused on modernizing the user interface (DxDesigner) and enhancing integration with analysis tools.
The first major releases under the unified Mentor Graphics umbrella focused on structural stability and cross-probing between PADS Logic (schematic) and PADS Layout.
Before it was "Mentor Graphics PADS," it was simply . The software was developed in the early 1980s by a company named CAD Software , Inc., based in Littleton, Massachusetts. At the time, PCB design was done on Unix workstations costing $50,000+. PADS was revolutionary because it ran on MS-DOS on a standard IBM PC.
Implemented basic 3D visualization capabilities inside the layout tool, allowing designers to check mechanical clearances. It added physical design reuse features, allowing engineers to copy and paste complex routed circuits across different layouts. PADS 9.5 (2012)
During this time, Mentor released major versions like PADS 2005 , 2007 , and 9.x . These versions introduced tools like PADS Logic and PADS Router .
Mentor gradually rebranded the software from PowerPCB to simply "PADS Layout" and "PADS Logic," standardizing version numbering into the 9.x lifecycle.
| Edition | Target Users | Key Features | | :--- | :--- | :--- | | | Entry-level engineers | Schematic capture, PCB layout, starter parts library, part creation wizard | | PADS Standard Plus | Intermediate designers | Advanced constraint management, high-speed net constraints and routing, HyperLynx-powered signal/thermal/analog simulation, central library management | | PADS Professional | Advanced professionals | Xpedition-derived technologies (Sketch Router, 2D/3D simultaneous layout), FPGA-PCB co-design, advanced signal integrity analysis |
Evolution of the Standard: A History of Mentor Graphics PADS Subject: Electronic Design Automation (EDA) Software Lineage Date: October 2023
In 2015, Mentor Graphics restructured the brand into three distinct tiers based on complexity:
Introduced thermal analysis tools and expanded differential pair routing rules, allowing physical constraints to be defined directly from the schematic.
Mentor Graphics integration; added HyperLynx SI and 3D viewing. 2014 – 2021 Windows 7/10
