On the Terminals page, you will choose the terminal(pin) type used by your part and the dimensions of that terminal. You will also define how the terminal(pin) are positioned on the package body.
When multiple terminal groups are used to build a part, use the controls below to view a specific set of terminals(pins).
Here you will specify the type of terminal(pin) your part uses. You can choose between C-bend, Flat, Gull-wing, J-bend, L-bend, Surface-terminal, Wraparound, S-bend, and J-inverted.. Notice that when you choose a particular terminal contact area, you will see a 2D model of it in the right-hand split screen. Just as with your component, the dimensions of the terminal will be shown in the 2D model as you specify them.
Also, if you hover over the icon you will be given the location in the JEDEC standard JESD-30 that describes the definition of each terminal type.
If the Flat terminal is selected, the Flat terminal controls will appear.
Use the information in your datasheet to answer theses questions.
Next you will select your terminal(pin) position. Notice that the 2D component model on the right side of the screen specifies the dimensions entered so far. Dimensions showing as a question mark will be entered during the process.
If the terminals(pins) in the datasheet are on both sides of the part, choose Dual. If the terminals are along 1 side of the part choose Single. In our example, we select Dual.
Looking at your datasheet, select the image best representing how the terminals are positioned relative to the body. In our example, we select Back-to-Front with Edge-Out.
Here you will enter the number of terminal(pin) columns as shown in the datasheet. In our example we have 3.
Next you will specify the Terminal(Pin) Function of Electrical, Elecrical Mechanical or Mechanical. We have chosen Electrical as all terminals carry signals for this datasheet.
Next you will specify the Terminal Shape. We selected Rectangle per our Datasheet.
Next you will specify the Terminal X Offset only if there is an offset in your datasheet. If the terminals are not offset, skip this step.
If your terminals(pins) are offset per your datasheet, select one of the 3 options Left side of Body, Center of Body or Right side of Body.
Next, select one of the options Right side of Left Terminal Contact Area or Left side of Right Terminal Contact Area and enter the Offset specified in the datasheet.
Our example has no offset so we will skip this step.
Terminal(Pin) Contact Positions
You must provide the Terminal Contact Positions. Pitch is the center-to-center distance between terminals(pins) and Span is the overall outside to outside dimension of the terminals. Pitch and Span are shown on the 2D image on the right side to assist you with this dimension.
In our example Pitch is dimension D and Span is dimension C.
The Pitch and Span define the position of the terminals(pins). The controls are split into two tables, one for the X Dimensions (x) and one for the Y Dimensions (y). These controls may appear in either table depending on the chosen terminal position. Pitch will only appear if there are two or more terminals in its respective dimension. For our datasheet, Pitch is dimension D and Span is dimension C.
Terminal(Pin) Dimension (T Dim)
You must provide the terminal(pin) Dimensions per the datasheet. These are the length and width of the terminal. T Dim1 is the x dimension and T Dim2 is the y dimension. Terminal Thickness is the thickness of the terminal after plating, i.e. the cross-sectional area of the terminal.
In our example, T Dim1 is A, T Dim2 is L and Terminal Thickness is M.
Once done, you will be presented with a 2D model in the right side of your screen depicting your component with terminals attached. Again, use the 2D model of your component to ensure that your dimensions were entered correctly.
Continue to Details
Additional examples may be found at Custom Footprint Examples.
If C-bend, Gull-wing or J-bend terminal(pin) types are selected, the user will be asked about coplanarity. Coplanarity is explained in JEDEC standard JESD88 as the following: "The condition where an interrupted surface, or two or more surfaces, have all their elements in one plane. The tolerance zone is established by 2 parallel planes between which all elements of the interrupted surface must lie. This is analogous to the flatness requirement for a continuous surface."