Cadence® system design and verification solutions, integrated under our Verification Suite, provide the simulation, acceleration, emulation, and management capabilities.
Verification Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
More Support Log In
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
Exchange ideas, news, technical information, and best practices.
The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information.
It's not all about the technology. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
As process geometry shrinks, leakage power increases exponentially. To reduce leakage power, power shutoff (PSO) of inactive blocks is rapidly becoming a design requirement.
When a block shuts off, its outputs must be isolated. From simulation point of view, outputs of a shut-off block should be driven to X to indicate that the block is not driving valid values. Isolation keeps the X values of the shutoff block from propagating to the active portion of the chip. From circuit point of view, isolation prevents a floating output of the shutoff block from turning on both NMOS and PMOS transistors and causing short-circuit current in an active gate.
Some designs have used standard logic gates (AND, OR gates) for isolation. This is not recommended. The danger with this approach is that the designer may not be fully aware of how these gates are built. If this gate has an inverter on the data input, then it could dissipate short-circuit current when the driver of the data input is shut off (floating).
The recommended methodology is to use dedicated isolation cells provided by the library vendor. These cells have been designed to ensure no short-circuit current when isolation is enabled.
If a designer must use standard logic gates for isolation, he/she must verify the transistor-level schematic to make sure that there are no inverters on the inputs of these gates. The desginer must also use the “-non_dedicated” option of the define_isolation_cell CPF command to indicate that this gate can be used for both standard logic and for isolation.
One should always use Conform Low Power (CLP) to check the integrity and structure of the low-power circuits. If standard logic gates are used for isolation, it is even more important to use CLP to check for any sneak-path current. This ensures that the design will achieve the low-power objectives.Luke