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Allegro Extra pins and Missing Pins

salasidis

I am new to Allegro, and have a problem with PCB Footprints for certain components.

 

For example,

 

A) one component mounts on a Dip16 footprint, but only has 4 pins (pin 1,8,9,16).

 

B) A diode uses a SOT-23 package with 3 pins, but only 2 pins are required.

 

How does one force Allegro to ignore missing pins in the schematic that are not required (example A).

 

I have "fixed" this by defining in my Orcad CIS part schematic invisible zero length pins that are not required (ie define the other 12 pins in example A, or create a new diode symbol with an extra unused pin.

 

Is there a better way?

 

 

(netrev.lst output below

 

ERROR(SPMHNI-196): Symbol 'SOT65P210X110-3N' for device 'DIODE TS_SOT65P210X110-3N_DISCR' has extra pin '3'.

#2   WARNING(SPMHNI-192): Device/Symbol check warning detected.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '2'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '3'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '4'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '5'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '6'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '7'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '9'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '11'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '12'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '13'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '14'.

ERROR(SPMHNI-196): Symbol 'DIP16' for device 'CPC1945G_DIP16_DISCRETE_CPC1945' has extra pin '15'.

Parents

  • The "NC" property is added in Capture (schematic), not the layout.

    1) Pick the part on the schematic; RMB --> Edit Properties (Properties GUI comes up)

    2) Click New Column tab: Add NC as the Name and your pin numbers as the Value

    (e.g. New Column --> Name: NC ; Value: 1,2,3,etc. whatever pins are no connect)

    Good day.

    Mitch

Reply

  • The "NC" property is added in Capture (schematic), not the layout.

    1) Pick the part on the schematic; RMB --> Edit Properties (Properties GUI comes up)

    2) Click New Column tab: Add NC as the Name and your pin numbers as the Value

    (e.g. New Column --> Name: NC ; Value: 1,2,3,etc. whatever pins are no connect)

    Good day.

    Mitch

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