11.7. Multiple Units per Component and Alternate Body Styles

11.7. Multiple Units per Component and Alternate Body Styles

Components can have two symbolic representations (a standard symbol and an alternate symbol often referred to as “DeMorgan”) and/or have more than one unit per package (logic gates for example). Some components can have more than one unit per package each with different symbols and pin configurations.

Consider for instance a relay with two switches which can be designed as a component with three different units: a coil, switch 1, and switch 2. Designing a component with multiple units per package and/or alternate body styles is very flexible. A pin or a body symbol item can be common to all units or specific to a given unit or they can be common to both symbolic representation so are specific to a given symbol representation.

By default, pins are specific to each symbolic representation of each unit, because the pin number is specific to a unit, and the shape depends on the symbolic representation. When a pin is common to each unit or each symbolic representation, you need to create it only once for all units and all symbolic representations (this is usually the case for power pins). This is also the case for the body style graphic shapes and text, which may be common to each unit (but typically are specific to each symbolic representation).

11.7.1. Example of a Component Having Multiple Units with Different Symbols:

This is an example of a relay defined with three units per package, switch 1, switch 2, and the coil:

Option: pins are not linked. One can add or edit pins for each unit without any coupling with pins of other units.

All units are not interchangeable must be selected.

Unit 1

Unit 2

Unit 3

It does not have the same symbol and pin layout and therefore is not interchangeable with units 1 and 2.

Graphical Symbolic Elements

Shown below are properties for a graphic body element. From the relay example above, the three units have different symbolic representations. Therefore, each unit was created separately and the graphical body elements must have the “Common to all units in component” disabled.