CCS | output_current_rise | output_current_fall | standard cell characterization

In this video, we do a deep technical dive into the CCS (Composite Current Source) Output Current Waveform used in Standard Cell Characterization. This session explains how output_current_rise and output_current_fall are modeled, stored, and used by timing tools like Cadence Liberate for accurate delay, slew, and power analysis. 🔍 Topics covered in detail: • What is CCS output current waveform • Meaning of output_current_rise (0 → 1 transition) • Meaning of output_current_fall (1 → 0 transition) • PMOS and NMOS behavior during output transitions • Time vs current representation in CCS • Reference time and index_3 explanation • How CCS stores waveforms using lookup tables (LUTs) • CCS template (output_current_template / ccs_template) • Input slew vs output capacitance indexing • How timing tools reconstruct current waveforms • Real .lib CCS syntax with practical examples • Detailed plotting of CCS current waveform from liberty data This video is extremely useful for: ✔ Standard Cell Characterization Engineers ✔ VLSI Backend / STA Engineers ✔ Physical Design Engineers ✔ ASIC Library Developers ✔ Cadence Liberate users ✔ VLSI interview preparation 📌 Tools & Concepts: • Cadence Liberate • CCS timing model • Liberty (.lib) format • Output current LUTs • Advanced timing modeling ⏱️ Video Timestamps: 👍 If you find this video useful: • Like the video • Share with VLSI friends • Subscribe for more deep-dive VLSI content ✨ Stay Connected with Me: 👉 Become a TMSY Community Member: https://www.youtube.com/@maharshisanandyadav/join 💼 LinkedIn → https://www.linkedin.com/in/t-maharshi-sanand-yadav/ 🎓 Udemy Course → https://www.udemy.com/course/digital-system-design-using-verilog-hdl/?couponCode=NVDIN35 📸 Instagram → https://www.instagram.com/vlsi.tmsy.tutorials/ 🎥 YouTube → https://www.youtube.com/@maharshisanandyadav 📂 More Learning Playlists: 🔹 Standard Cell Characterization → https://youtube.com/playlist?list=PLS8qCSk3htIIKeumRz1CwcW9sIkLiUJlv&si=VZZIu3zQYMVLkTvw 🔹 STA → https://youtube.com/playlist?list=PLS8qCSk3htILFBC9KIJG6uKWsEX72BNp7&si=epLh1bY5Go-texiq 🔹 Synthesis and STA → https://youtube.com/playlist?list=PLS8qCSk3htIIRzZRz_P1GUbvW5d2Ctvix&si=UhbfoRRFzbIxCCmV 🔹 Verilog Codes → https://youtube.com/playlist?list=PLS8qCSk3htIJj0nkqn6Il3bz8RnR8mddM&si=k9gbzUq5jWJwtDJg ✨ Hashtags for reach: #VLSI #CCS #CadenceLiberate #StandardCellCharacterization #ASIC #STA #TimingModel ccs output current waveform,output_current_rise,output_current_fall,ccs timing model,standard cell characterization,cadence liberate tutorial,ccs vs nldm,liberty ccs waveform,vlsi timing model,asic standard cell,sta timing model,vlsi backend,physical design timing,liberty file ccs,ccs template,output current lut,vlsi interview questions,semiconductor vlsi