SOT223 pin numbering

Hi.

SOT223 produces footprints with pin numbers 1 to 4 while Capture expects for pins 0 to 3.

I understood how to rearrange pin order, but can't find a way to renumber them 0 to 3.

Thanks
Martins

Please note these pin numbers I refer are internal Orcad Capture pin numbers, not manufacturer numbers or the usual way we count pins.

I don't have the system here, but as much as I remember it is mosfets NDT3055 and NDT2955. Same for SIPC14N60 (also mosfet).

I suppose from Orcad default libs.

Meanwhile I found out that in script file there is something like "NEXTPIN 1", that I changed to "NEXTPIN 0" and rerun batch file.

It seems OK now. Capture's 'see footprint' (just by memory, don't forget) gives correct result.

If you need more details I can give them tomorrow.

Martins

I apparently solved the problem the following way:

In SOT223-4.scr in:

# Pin Generation
add pin
setwindow Form.mini
FORM mini pad_name r197_89
FORM mini next_pin_number 0
rotate
iangle 270
FORM mini pintype_mechanical NO
FORM mini offsetx 0
FORM mini offsety 0
setwindow pcb
pick -2.3 -3.025
pick 2.3 -3.025
pick 0 -3.025
setwindow Form.mini
FORM mini pad_name r197_319
iangle -180
setwindow pcb
pick 0 3.025
done

I changed the bolded line to:

FORM mini next_pin_number 0
Them I rerun he batch file.

It seems to have solved the problem (as time goes by it will become clear).

Software should include an easy way to define first pin number.

Martins

No, no. I did not rename anything.

The above list with three component types is just an example of how different components (and packages) are arranged in terms of pin numbers.

AD8051 is indeed AD8531 (I apologize for the mistake) and is SOIC8.

NDT8055 and 14N60* (mosfets) are SOC223

H11AV1 (optocoupler) is DIP6.

In Orcad Capture, the mosfets NDT8055 and 14N60 have pin numbers from 0 to 2 whose names are: s, g, d respectively.

Note*
14N60 was indeed TO220 but for other peculiar reason I created a 'special' SOC223 so that I can solder TO220 as if it would be an SMD device. Anyway, in Orcad Capture the pin numbering is the sae as mosfet NDT8055.

You can change orcad capture pin numbers by editing the part. click on the part, right mouse button, edit part. When you leave out of edit you can save the change for all parts or just the one. Hope this helps.