Optimum Design Associates Blog



Schematic Symbol Properties for DxDesigner

As we’ve covered in other posts on schematic symbols, one of the key goals of a librarian is to maintain consistency, both in terms of visual appearance of a symbol, and parity with a manufacturer’s data sheet. Establishing a set of standards which all schematic symbols must abide by allows for more timely part identification, and cleaner, easier to read schematics. With that in mind, let’s take a look at display settings for schematic symbols within Optimum’s library.

Base Symbol: adg1407-dil28.1 (dual inline IC, 28 pin)


DxDesigner Tutorial: Pin Name Abbreviations

Optimum’s symbol library makes extensive use of various abbreviations in symbol names. Our previous posts have dealt with the pins of schematic symbols, and the general theory behind some of our naming conventions. A look into our naming abbreviations could have been joined with our overarching naming convention post, but we feel the large number of different abbreviations warrant a standalone post.

Part Type Qualifier Abbreviations


DxDesigner Tutorial: Schematic Symbol Pins

While having appropriate labeling and naming for schematic symbols is the most critical aspect of organizing your symbol library, ensuring that pins for all symbols are consistent is equally critical. This maintains visual consistency on the schematic, and consistent connection points within DxDesigner. All of the pin settings must be considered: visual aspects such as length and orientation, as well as technical considerations such as inverted pins and location of connection points. Optimum maintains rigorous standards for pins on schematic symbols, let's take a more in depth look. 


DxDesigner Tutorial: Schematic Symbol Naming Conventions

Much like your library of footprints or cells, proper naming conventions are critical for easy identification and utilization of schematic symbols. This can be complicated by the fact that generic symbols can be utilized for certain component types, whereas more intricate components, such as connectors or ICs, will require unique symbols with different naming conventions. In this series of DxDesigner tutorials we’ll take a look at the organizational methods of Optimum librarians, beginning with symbol naming, and moving on to pin considerations, and overall symbol library structure.

Symbol Name Prefixes


Mentor Expedition Library Tutorial: Renumber Pins Referenced by Parts

At various points in your design process it may be necessary to modify the pin naming or numbering of components in your design. Be it an error in the part’s original creation, pin or gate swapping for placement and layout concerns, any number of reasons. Modifying symbol pin names or cell pin numbers after the elements are associated with a part will invalidate the part. Fortunately, Library Manager has built in utilities to assist with modifying pin labeling in these instances.


About Optimum's Library Management Service

If you're familiar with Optimum Design's work, you probably know all about our EMS and PCB design services. What you may not be aware of is our Library Management service, in which Optimum's librarians handle your library, building parts to your standards and delivering them within 48 hours. Our library team prides itself on near 100% accuracy, and being open and available in the off chance that problems with our components come to light. Lets take a bit more in depth look at some of the services provided. 

Mentor Expedition Library Tutorial: Add Dimension Data to a Cell

Dimensioning data can be an invaluable tool to PCB designers and librarians. It helps ensure accuracy and consistency, with necessary information regarding part size readily visible. For a designer this can ensure that a component will be useable in a high density layout. From a librarian's perspective, dimensioning data allows for quick reference to a component data sheet for the purposes of checking. 


Mentor Expedition Library Tutorial: Make Schematic Symbols from CSV Files

General Process Overview

                Select a symbol

                Export pins to ms excel spreadsheet

                Make pin changes in the spreadsheet

                Import pins and generate symbol automatically


Mentor Expedition Library Tutorial: Delete a Cell Referenced by a Part

While it won't always be necessary, there will come times when Cells must be deleted from your part library. Perhaps an error was discovered when trying to place a part on a PCB design, or a new generic part for a passive component will be utilized, say an 0402 capacitor. Chances are those Cells will be referenced by multiple parts in your PDB database. Because they reference parts in the database, deleting these cells isn't as simple as clicking the delete button and calling it a day. The steps below outline how to properly delete a cell from your component library if its referenced by parts within the library. 


Mentor Expedition Library Tutorial: Display Control Settings for PCB Library

Mentor’s Display Control gives designers and librarians myriad options for influencing how a design is displayed on the screen. The goal of any display scheme is to have any information a designer needs readily visible, so more time is spent working, as opposed to scouring the design for the portion you wish to work on. While the individual colors chosen are personal preference, best practices exist for both library and PCB design work. Let’s take a look at how many of Optimum’s librarians configure their Display Controls.