Hi, Here is the datasheet of a sensor having the package SOT23-6.I learned how to make a custom Eagle package from insturctables.com. The problem is that i cant understand the dimensions correctly.Heres my interpretation(most likely its wrong):

Horizontal Length=2.75mm

Vertical Length=1.45mm

Vertical Length(with pins)=2.6mm

Distance b/w centers of two pins=0.95mm

Horizontal Len: of pins=?

Vertical Length of pins=?

I cant even guess the above two!Please correct me and if i have missed any other important parameter then also point it out!

Go to ref-packages.lbr
The SOT23-6 is there.

John

For some reason its not in my Eagle Library.The ref-packages.lbr is present but when i search for it it turn up nothing.This has happened with some other components also.Is it because i am using it as freeware?I downloaded it again but the existing file is 3.24mb and the downloaded one is 3.23mb so i didnt overwrite it.Can you tell me what the problem is!

in version 5.2.0 it is called TSOC6.

If you prefer you might use my library.

The package was made using the attached data sheet. Yours is incomplete. (no soldering footprint)

Boncuk

My version of EAGLE is 5.2.0 as well. In my version it is present as SOT23-6 and as TSOC6. When I got to the SOT, I didn't bother to look further down the list.

The libraries should not be different between freeware and purchased copies. I wonder whether the OP (or someone he got the program from) accidentally hit the dreaded drop button instead of the OK button when adding components?

One suggestion is to fresh install the freeware.

John

Edit: Just noticed the file size differences. Bigger doesn't necessarily mean better. I suggest re-install with the newest version.

Originally Posted by Boncuk

in version 5.2.0 it is called TSOC6.

If you prefer you might use my library.

The package was made using the attached data sheet. Yours is incomplete. (no soldering footprint)

Boncuk

Thanks Boncuk.I downloaded it from ti.com but its a shame that it isnt the full data sheet.Thanks for the package you made.Appreciate it greatly.Also since you are 'the' PCB Guy around here i have one question:

Can i make double sided boards by using Eagle freeware?
I am planning to make a complete Junebug this vacation.

Originally Posted by jpanhalt

My version of EAGLE is 5.2.0 as well. In my version it is present as SOT23-6 and as TSOC6. When I got to the SOT, I didn't bother to look further down the list.

The libraries should not be different between freeware and purchased copies. I wonder whether the OP (or someone he got the program from) accidentally hit the dreaded drop button instead of the OK button when adding components?

One suggestion is to fresh install the freeware.

John

Edit: Just noticed the file size differences. Bigger doesn't necessarily mean better. I suggest re-install with the newest version.

I just reinstalled it.And got nothing.I downloaded it from cadsoft.de.Will downlaod a fresh copy now.Thanks

I downloaded a new copy and intalled it.The problem is that it doesnt show some libraries! I guess thats the reason i am not getting all the packages.What could be the problem?

And its not picking up Boncuks custom made library also!

Hi Abbas,

thanks for the flowers.

I'm just a perfectionist, nothing more but also nothing less. If I get a package "served" I normally check the truth before using it for a design.

(absolutely no drive to mess around with false dimensions of any part.)

If you want to use that library, containing nothing but a package I recommend to put it in your '.lbr' directory.

To create a device you must make a symbol first. Save the symbol with the pad numbers (I prefer pads instead of pin names and name the pins within the symbol for easier tracking in the PCB layout, which is also very useful when debugging a circuit.)

Use the symbol to create the device and assign the package (SOT23-6). Assign the pin numbers and you're done after saving the device.

BTW, there are some key dimensions in any component to be used:

The body size is of minor importance and can be negligated in most cases. It will result automatically using the correct pin spacing horizontally and vertically. Most important is the factory given soldering foot print which must be true for any deviation of outer dimensions of the part.

Draw the footprint first and add the outline of the package when finished. The more accuracy you apply the more likely the part will fit without measuring the dimensions physically. My selfmade minimum requirement is 1/100mm.

Kind regards

Boncuk


P.S. And of course you can make double sided PCBs with the free version, but restricted to a board size of 100X80mm (3.94X3.15inches)

Originally Posted by bassnut

The horizontal pin length from your diagram looks to be 0.3mm and the verticle length some 1.0mm, although thats not shown. Verticle pin length wouldnt be that critical I wouldve thought, dosent affect the layout.

But it does affect soldering a part in place properly. The pad size is determined by actual pin length and the surface left over to solder the place in part. (The solder pad must be longer than the maximum pin length.)

It won't do you any good to have a neat looking layout and when it comes to soldering you don't have any copper area where to connect the part.

Soldering underneath a part has some unwanted side effects.

BTW, all SMD parts are based on metric scaling (at least the body dimensions) . Switch to at least 1/20mm to find out the dimensions of pads and part body size.

Regards

Boncuk

Originally Posted by Boncuk

Hi Abbas,

thanks for the flowers.

I'm just a perfectionist, nothing more but also nothing less. If I get a package "served" I normally check the truth before using it for a design.

(absolutely no drive to mess around with false dimensions of any part.)

If you want to use that library, containing nothing but a package I recommend to put it in your '.lbr' directory.

To create a device you must make a symbol first. Save the symbol with the pad numbers (I prefer pads instead of pin names and name the pins within the symbol for easier tracking in the PCB layout, which is also very useful when debugging a circuit.)

Use the symbol to create the device and assign the package (SOT23-6). Assign the pin numbers and you're done after saving the device.

BTW, there are some key dimensions in any component to be used:

The body size is of minor importance and can be negligated in most cases. It will result automatically using the correct pin spacing horizontally and vertically. Most important is the factory given soldering foot print which must be true for any deviation of outer dimensions of the part.

Draw the footprint first and add the outline of the package when finished. The more accuracy you apply the more likely the part will fit without measuring the dimensions physically. My selfmade minimum requirement is 1/100mm.

Kind regards

Boncuk


P.S. And of course you can make double sided PCBs with the free version, but restricted to a board size of 100X80mm (3.94X3.15inches)

I copied the symbol in the lbr flder and also updated it.Got nothing.Thanks for your tips on making custom packages.I will keep them in mind.I will now try installing Eagle in my laptop and see if it doesnt pose any problems(hopefully).This library problem is because of my computer rite?cause i downloaded a fresh copy from cadsoft.de.

It has the same prob in my laptop!Now i will try version 5.2

Originally Posted by jpanhalt

What version of Eagle have you been using? What do you mean by, "got nothing?" Was the screen blank, or did you get an error message?

John

The search turned up nothing. Sorry, no match!. Eagle 5.2 doesnt have any wonders too(not that i was expecting it to).The only thing i get by typing SOT is a SOT23 some LM IC.It gives the same result.