PartQuest Portal Subscription: Essential tier
This example steps you through the process of using the Symbol Creator tool to edit a standard symbol to replace the one that comes with the LM741CNNS/NOPB PartQuest Portal part.
The Choose Symbol dialog box displays.
The Symbol Creator displays with a symbol named “Texas_Instruments_LM741CN_NOPB”.
The datasheet displays the details about this part, such as the functional pin names and the terminal numbering. As shown in the datasheet section called “Pin Configuration and Functions”, pin 1 on the package has a functional name of Offset Null.
The default symbol in the Symbol Creator Symbol Preview pane includes optional pins as shown on the left in the following figure:
The Symbol Creator tool hides the optional pins, as shown on the right in the previous figure.
This part utilizes two of the optional pins we removed, both called Offset Null in the datasheet, pins 1 and 5.
Datasheet pin # |
Datasheet Name |
JEDEC Name in Terminal(Pin) List |
---|---|---|
2 |
INVERTING INPUT |
Negative Input |
3 |
NONINVERTING INPUT |
Positive Input |
1 |
OFFSET NULL |
Offset Node 1 |
5 |
OFFSET NULL |
Offset Node 2 |
6 |
OUTPUT |
Output |
7 |
V+ |
+V |
4 |
V- |
-V |
Each functional name now corresponds to the matching footprint terminal number, as shown in the following figure:
Click the Collapse () button to see more of the Symbol Preview window.
As shown in the datasheet, this part has a No Connect pin on terminal 8. On the bottom of the Terminal(Pin) List, in the Unassigned Footprint Terminals area, the Symbol Creator tracks how many pins are currently unassigned. In this example, there is one unassigned terminal.
The Symbol Creator adds the NC terminal to the Terminal(Pin) List.
The symbol size adjusts to accommodate the longer name.
User-defined pin names can be repeated because these are labels only. The real pin names are displayed in the JEDEC Name column.