The 15.7 release was a "Base Release" that stayed in active service until it was superseded by version 16.0 in 2007. It is often remembered for its stability and as the bridge between older, standalone OrCAD products (like OrCAD Layout) and the modern, Allegro-based "PCB Editor" environment. Key Components and Features
Released in the mid-2000s, OrCAD 15.7 represents a "sweet spot" in EDA history. But why are engineers still talking about (and using) it nearly two decades later? 1. Stability and Speed cadence orcad 15.7