Interactive Static Timing Analysis (STA) visualizer for understanding Setup & Hold timing with live waveforms, timing diagrams, slack equations, skew, jitter, and path analysis.
An interactive Static Timing Analysis (STA) playground for learning Setup & Hold timing visually.
Live timing diagrams • Interactive waveforms • Slack calculations • Clock skew • Jitter • Path analysis
Full Cycle Path STA
https://mohammeds2lah.github.io/STA-Visualizer/Full_Cycle_Path_STA/
Half Cycle Path STA
https://mohammeds2lah.github.io/STA-Visualizer/Half_Cycle_Path_STA/
Full & Half Cycle Path STA
https://mohammeds2lah.github.io/STA-Visualizer/Full_Half_Cycle_Path_STA/
Static Timing Analysis is one of the most important topics in digital design, ASIC, and FPGA development, yet it is usually taught using static equations on slides or whiteboards.
This project was built to make STA intuitive.
Instead of reading equations, you can interact with every timing parameter and immediately see how it changes:
- Timing diagrams
- Launch and capture waveforms
- Setup and Hold equations
- Slack values
- Clock skew
- Clock jitter
- Combinational delay
- Cell sizing
- Threshold voltage (LVT/RVT/HVT)
Everything updates live.
- Interactive Setup & Hold timing visualization
- Supports all three standard timing paths
- IN → REG
- REG → REG
- REG → OUT
- Live timing waveforms
- Interactive timing diagrams
- Real-time Setup & Hold slack calculation
- Clock skew visualization
- Clock jitter modeling
- Cell sizing exploration
- LVT / RVT / HVT comparison
- Buffer insertion for hold fixing
- Corner-aware timing calculations
Try experimenting with:
- Increase clock frequency
- Add positive clock skew
- Add negative clock skew
- Change LVT ↔ RVT ↔ HVT
- Upsize logic cells
- Insert delay buffers
- Increase jitter
- Observe setup and hold slack
The visual feedback makes it much easier to understand the trade-offs than reading equations alone.
This project is intended as an educational visualization tool.
It demonstrates the concepts behind Static Timing Analysis but is not intended to replace signoff STA tools such as PrimeTime or Tempus.
Ideas and bug reports are always welcome.
If you're interested in digital design education or STA visualization, I'd be happy to collaborate.
Mohammed Aboshosha
If you find this project useful, consider giving it a ⭐ on GitHub.
This project is licensed under the MIT License.
Copyright (c) 2026 Mohammed Aboshosha.
This project was created and is maintained by Mohammed Aboshosha.
If you use this project in:
- university courses,
- tutorials,
- workshops,
- conference presentations,
- YouTube videos,
- blog posts,
- or other educational material,
a link back to this repository is greatly appreciated.
Repository: https://github.com/MohammedS2lah/sta-visualizer
STA Visualizer is an educational tool designed to help students and engineers understand Static Timing Analysis concepts through interactive visualization.
It is not intended to replace professional signoff STA tools such as Synopsys PrimeTime, Cadence Tempus, or OpenSTA.