These updates are for registered users of TopSPICE who have purchased the "SPICE3 Simulator Option" only. Please request the installation password and instructions by e-mail to before downloading an update file. Your message must include the registered user's full name, company name (if applicable), software registration/serial number, and the update/patch file name (or update version) you want to install. Or if you prefer, you can use the Update Request Form instead.
This software is protected by both United States copyright law and international treaty provisions. Unauthorized installation, use, copying or distribution is prohibited.