CAD/CAE符号 Symbols

Both PCB footprints and schematic symbols are available for download in a vendor neutral format which can then be exported to the leading EDA CAD/CAE design tools using the Ultra Librarian Reader. The reader is available for free download (ZIP: 27.8MB).

The UL Reader is a subset of the Ultra Librarian toolset that can generate, import, and export components and their attributes in virtually any EDA CAD/CAE format.

Footprints generated by the UL Reader are based on the IPC-7351 specification. In addition, the components (both symbol and footprint) can be modified to meet a user-defined standard using a purchased upgrade to the Ultra Librarian.

Providing components based on parametric data through the Ultra Librarian Reader will allow National customers to reliably create consistent quality CAD entities to an established standard with minimal effort. It is anticipated that this free download service will save National's customers significant time.

The footprints are available in three sizes depending on the IPC standard for the least, medium and maximum real estate on the PCB. The naming convention for the files is as follows: Every NSID has three variations e.g. LM2676SD.bxl, LM2676SD_L.bxl, and LM2676SD_M.bxl. The suffixes 'L' and 'M' indicate least and maximum real estate on the PCB and the name with no suffix indicates medium density on the PCB.

The Ultra Librarian software is a free downloadable reader which allows the user to view the 'bxl' files. It also allows you to export these symbols and footprints in to other CAD tools using the Ultra Librarian software (ZIP: 27.8MB) (Note: This software does not currently support double byte systems.)