Library of open source Process Design Kits
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Lambdapdk
Lambdapdk is a collection of open-source Process Design Kits (PDKs) that enable chip design across multiple technology nodes. Each PDK includes standard cell libraries, I/O libraries, and memory compilers with full integration into the SiliconCompiler build system and Lambdalib Verilog hardware abstraction library.
Why Lambdapdk?
Challenges
- PDK setup is complex and error-prone
- Technology-specific designs limit portability
- Commercial PDKs have restrictive licenses
- Scattered PDK sources with inconsistent interfaces
Solution
- Pre-configured PDKs ready for immediate use
- Lambdalib mapping enables design portability
- Fully open-source PDKs for research and education
- Unified API across all supported technologies
Supported PDKs
| PDK | Node | Libraries | Source |
|---|---|---|---|
| ASAP7 | 7nm FinFET | Standard cells (RVT/LVT/SLVT), I/O, SRAM | Arizona State University |
| FreePDK45 | 45nm | Nangate standard cells, SRAM | NC State / Nangate |
| Sky130 | 130nm | Standard cells (HD/HDLL), I/O, SRAM | Google / Skywater |
| GF180 | 180nm | Standard cells (7T/9T), I/O, SRAM | Google / GlobalFoundries |
| IHP130 | 130nm SiGe | Standard cells, I/O, SRAM | IHP GmbH |
| Interposer | Multi-layer | Bump cells for chiplet integration | ZeroASIC |
Quick Start
Installation
pip install lambdapdk
Basic Usage
from siliconcompiler import ASIC, Design
from siliconcompiler.targets import skywater130_demo
# Create design and add source files
design = Design("mydesign")
design.set_topmodule("mydesign", fileset="rtl")
design.add_file("mydesign.v", fileset="rtl")
design.add_file("mydesign.sdc", fileset="sdc")
# Create ASIC project and load target
project = ASIC(design)
project.add_fileset(["rtl", "sdc"])
skywater130_demo(project)
# Run the flow
project.run()
project.summary()
Available targets: asap7_demo, freepdk45_demo, skywater130_demo, gf180_demo, ihp130_demo, interposer_demo
Cell Library Inventory
ASAP7 (7nm)
Standard cell libraries with three threshold voltage variants:
| Library | Type | Cells | Verilog |
|---|---|---|---|
| asap7sc7p5t_rvt | Regular Vt | ~200 | verilog |
| asap7sc7p5t_lvt | Low Vt | ~200 | verilog |
| asap7sc7p5t_slvt | Super Low Vt | ~200 | verilog |
Cell categories: AND, OR, NAND, NOR, XOR, INV, BUF, MUX, DFF, Latch, Adder, Tie, Filler, Decap, Tap
Memory macros (fakeram7):
| Configuration | Verilog |
|---|---|
| Single-port 64x32 to 8192x64 | verilog |
| Dual-port 64x32 to 8192x64 | verilog |
| True dual-port 64x32 to 8192x64 | verilog |
FreePDK45 (45nm)
| Library | Type | Verilog |
|---|---|---|
| nangate45 | Standard cells | lambda |
Cell categories: AND, OR, NAND, NOR, XOR, INV, BUF, MUX, DFF, Latch, AOI, OAI, Tie, Filler, Tap
Memory macros (fakeram45):
| Configuration | Verilog |
|---|---|
| 64x32 to 512x64 | verilog |
Sky130 (130nm)
| Library | Type | Cells | Verilog |
|---|---|---|---|
| sky130hd | High Density | ~430 unique | verilog |
| sky130hdll | High Density Low Leakage | ~140 unique | verilog |
| sky130io | I/O cells | Various | verilog |
Cell categories: AND, OR, NAND, NOR, XOR, INV, BUF, MUX, DFF, Latch, AOI, OAI, Delay, Tie, Filler, Decap, Tap, Antenna
Memory macros (sky130sram):
| Configuration | Verilog |
|---|---|
| 1RW1R 64x256 | verilog |
GF180 (180nm)
| Library | Type | Cells | Verilog |
|---|---|---|---|
| gf180mcu_fd_sc_mcu7t5v0 | 7-track | ~230 | verilog |
| gf180mcu_fd_sc_mcu9t5v0 | 9-track | ~230 | verilog |
| gf180mcu_fd_io | I/O cells | Various | verilog |
Cell categories: AND, OR, NAND, NOR, XOR, INV, BUF, MUX, DFF, Latch, AOI, OAI, Tristate, Delay, Tie, Filler, Decap, Tap, Antenna
Memory macros (gf180sram):
| Configuration | Verilog |
|---|---|
| 64x8 to 512x8 | verilog |
IHP130 (130nm SiGe)
| Library | Type | Verilog |
|---|---|---|
| sg13g2_stdcell | Standard cells | lambda |
| sg13g2_io | I/O cells | blackbox |
Note: IHP130 cell views are provided by the IHP Open PDK.
Interposer
| Library | Type | Description |
|---|---|---|
| bumps | Bump cells | Micro-bump cells for chiplet integration |
Stackup variants: 3ML, 4ML, 5ML with 400um, 800um, and 2000um bump pitches.
Architecture
lambdapdk/
├── asap7/ # 7nm FinFET PDK
│ ├── base/ # Technology files, DRC rules
│ └── libs/ # Standard cells, I/O, memory
├── freepdk45/ # 45nm PDK
│ ├── base/
│ └── libs/
├── sky130/ # 130nm PDK
│ ├── base/
│ └── libs/
├── gf180/ # 180nm PDK
│ ├── base/
│ └── libs/
├── ihp130/ # 130nm SiGe PDK
│ ├── base/
│ └── libs/
└── interposer/ # Passive interposer
├── base/
└── libs/
Contributing
We welcome contributions! Please report issues and submit pull requests at: https://github.com/siliconcompiler/lambdapdk/issues
License
This project is licensed under the Apache License 2.0.
Individual PDKs may have additional license terms:
| PDK | License | Details |
|---|---|---|
| ASAP7 | BSD 3-Clause | LICENSE |
| Nangate45 | Nangate Open Cell Library License | LICENSE (non-commercial use) |
| Sky130 | Apache 2.0 | Via open_pdks |
| GF180 | Apache 2.0 | Via gf180mcu-pdk |
| IHP130 | Apache 2.0 | Via IHP-Open-PDK |
| Interposer | Apache 2.0 | Copyright 2024 ZeroASIC Corp |
Copyright 2023 Zero ASIC Corporation
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