Challenges of a Schematic Designer
Every schematic designer faces some key challenges. This blog highlights those challenges and suggests some ways to work around them.
PCB DESIGNELECTRONIC SYSTEM DESIGNSCHEMATIC ENTRYLIBRARY MANAGEMENT
Atanu
8/2/20261 min read
Schematic design, PCB layout, and high-speed engineers face a distinct but overlapping set of technical challenges that span component selection, signal integrity, power integrity, EMI/EMC compliance, thermal management, and design for manufacturability (DFM). These challenges have intensified with the proliferation of high-frequency designs (>1 GHz), advanced protocols (PCIe Gen 5/6, USB4, DDR5, PAM-4), and miniaturization trends (HDI,chiplets, heterogeneous integration).
Schematic design engineers are responsible for capturing the logical design of a circuit, selecting components, defining net connectivity, and ensuring the design is electrically sound before layout begins.
Component Selection and Library Management: Poorly managed or decentralized component libraries are major bottleneck in PCB Design, often causing more delays than schematic or layout work. This is often overlooked by companies that have small design teams. Each team works with an expected level of autonomy for component selection. This leads to some key issues:
Incorrect outdated component footprints: Mismatched footprints cause issues during PCB layout and assembly, leading to respins.
Missing or incorrect manufacturer part numbers (MPNs): Many components have multiple variants, and all variants need correct MPNs for searchability and procurement.
Lack of datasheet access: Designers need immediate access to datasheets alongside component models to verify electrical and mechanical specifications.
Redundant component models: Decentralized libraries lead to duplicate or inconsistent component data, causing confusion and errors.
Non-compliant footprints: Component footprints that do not obey IPC-7351 or manufacturer specifications can lead to assembly failures.
To mitigate some of the above challenges we recommend:
Using Centralized Component Libraries: The whole design team using a central repository with data sharing and visibility for all team members. It becomes even more important when upgrading an older design design to the newer version - carefully updating all components and footprints to the latest version.
Automated library management tools: Leverage ECAD software with API access to distributor databases real-time databases for real-time sourcing data updates.
Standardized symbols, footprints and 3D model: Ensure all components three pieces of data for effective electrical and mechanical integration.
As an example Cadence Design Systems products like Capture allow the user to access external parts. For more details see here.
