Spectrum Software
Industrial Strength Simulation




Spectrum Software has released Micro-Cap 11, the eleventh generation of our SPICE circuit simulator.

For users of previous Micro-Cap versions, check out the new features available in the latest version. For those of you who are new to Micro-Cap, take our features tour to see what Micro-Cap has to offer.





End User License Agreement

End User License Agreement


Uninstall instructions

Uninstall instructions


Micro-Cap Evaluation/Student Version

Try a free limited version of the Micro-Cap simulator.


Evaluation Version


Professional Users Section

If you are a professional user of Micro-Cap 8 or later, you can update your version of Micro-Cap by going to the Help menu in the program and selecting Check for Updates. Otherwise, the Micro-Cap EXE files are only available for download from the Users Section. To gain access to this section, you must be a professional user of Micro-Cap. To have an account setup for you, please email . Include your name, company, Micro-Cap version, desired user name, and Key ID. The Key ID can be obtained by running Micro-Cap and hitting Alt+Z. Users who already have an account set up can access the Users Section to get the latest version of Micro-Cap.

Users Section


HASP Security Key Driver

Newer Driver: Sentinel_LDK_Run-time_cmd_line.zip

Older Driver: HASP4_driver_cmdline.zip - Micro-Cap 7 or earlier. The following instructions also apply but run the hinstall.exe file instead.

The Haspdinst.exe file present in the ZIP file needs to be run with the command switch '-i'. Click on the Start menu in Windows and select the Run option in the menu. In the Run dialog box, enter the full path (either manually or through the Browse option) for the Haspdinst.exe file. At the end of the string, hit the spacebar, and then type in -i. For example, if the files in the ZIP file were extracted to the path C:\HASP, the Run dialog box should contain a string such as:

C:\HASP\Haspdinst.exe   -i

If Windows has placed double quotes around the path and file name, the -i must be placed outside of the quotes.

This installs the latest security key driver which must be present to run the update.

If this does not work, remove the old driver and then reinstall the new one as follows:

%path%\Haspdinst.exe   -r

This removes the old driver. Then to install the new driver, type:

%path%\Haspdinst.exe   -i

where %path% is the location that the files were extracted to. A message should appear that states the driver has been successfully installed.