I just received more info from Cadence about their downloadable demo version.
I guess it's called the Lite version.
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Cadence has the Version 16.5 OrCAD Lite posted for download here
http://www.cadence.com/products/orcad/pages/downloads.aspx#demo OrCAD Products start in the Lite Mode if license for these products are not available. You can change to production mode by purchasing a licensed version.
Lite Mode allows you to open & view any file. Changes done to a design cannot be saved if the Lite limits are exceeded. The Lite limits in V16.5 have been increased compared to previous versions.
OrCAD Capture CIS Lite Limits
· You cannot save designs that have more than 75 nets, including the hierarchical blocks in the design. You can still view or create larger designs.
· You cannot save a design with more than 60 parts, including the hierarchical blocks in the design. You can still view or create larger designs.
· You cannot create parts with more than 100 pins.
· The Capture FPGA flow is not available.
· You cannot have more than 1000 parts in the Capture CIS database.
· The Internet Component Assistant (ICA) tab in the CIS Explorer window opens the About ActiveParts page (
www.activeparts.com) and not the component search page.
OrCAD PCB Editor Lite Limits
· You cannot save boards that have more than 50 components and/or 100 nets.
· However, you can still view larger designs.
· The tutorial and tutorial design files will work with Lite limitations.
· A limited sample library is provided.
PSpice A/D Lite Limits
· Circuit simulation limited to circuits with up to 75 nodes, 20 transistors, no sub-circuit limits but 65 digital primitive devices, and 10 transmission lines (ideal or non-ideal) with not more than four pair-wise coupled lines.
· Device characterization and parameterized part creation using the PSpice Model Editor limited to diodes.
· No limit to stimulus generation using Stimulus Editor.
· Sample model library named eval.lib (containing analog and digital parts) and evalp.lib (containing parameterized parts) are provided.
· The library nomd.lib is configured for simulations. The nomd.lib file references the set of libraries that can be used with the lite version.
· You cannot simulate parameterized parts that are not from the evalp.lib library. This library consists of parametrized resistor, source, and diode.
· You cannot use Level 3 of Core model (Tabrizi), MOSFET BSIM 3.2, or MOSFET BSIM 4 models.
· Displays only simulation data created using the lite version of the simulator.
· Magnetic Parts Editor allows you to design power transformers only.
· The database shipped with Magnetic Parts Editor cannot be edited and contains a single core.
· The Model Import Wizard supports parts and simulation models that have a maximum of two pins or two terminals, respectively.
· The maximum nodes in a digital circuit can be equal to or less than 250.
· The non-ideal Tline is limited to 4.
PSpice Advanced Analysis Lite Limits
· Smoke Analysis: Can run only on diodes, resistors, transistors, and capacitors.
· PSpice Advanced Analysis Optimizer
o Only Random and MLSQ engines can be used.
o Values of up to two component parameters can be optimized.
o A maximum of one measurement specification and one curvefit specification are supported.
o Only one error calculation method supported for optimizing the curve-fit specification.
· Parametric Plotter
o Can sweep the values of only two design and/or model parameters.
o Only Linear sweep in supported.
o A maximum of 10 sweeps allowed.
o Can evaluate the influence of changing parameter values only on one measurement expression or a trace.
· Monte Carlo/Worst Case Analysis
o Only one measurement specification is allowed.
o A maximum of three devices with tolerance are supported.
o Maximum of 20 Monte Carlo runs are supported.
· Sensitivity Analysis
o Only one measurement specification is allowed.
o A maximum of three devices with tolerance are supported.
o Maximum of 20 runs are supported.
· Encrypted parameterized models cannot be simulated.
· The Optimizer Random Engine can make a maximum of 5 runs.
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I've got some thinking to do now.
All my experience is with Protel/Altium. I wonder if I could make the switch?
It's just soooo much cheaper than Altium.