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wrong sot23 2N3906 pinout

Former Member

built a board, got the wrong pinout for this part.  I go to the library and was surprised to not find the one I want.  only two parts are listed in the part selection.

 

the part in the lib sot23-ecb has the collector on the single pin side which is ok for my need.  with the single pin up, I need base on the left and emitter on the right.

the part shows emitter on the left.

 

there has to be an easy way, just not sure what it is.

 

I'm new to eagle, but find it pretty easy to use till this.

 

thanks,

tim

  • Transistors and diodes come in many connection arrangements, even within

    the same package style, such as SOT-23...you really must check against YOUR

    data sheet....

     

    beware:

     

    You see a Toshiba 2N213323 sot-23 npn configured, as listed on the

    datasheet

    PIN 1: E

    PIN 2: B

    PIN 3: C

     

    But the price is double the LuChon sot-23 2N213323 device, also datasheet

    listed as:

    PIN 1: E

    PIN 2: B

    PIN 3: C

    Since they are the same numbering, there is no trouble swapping them right?

    WRONG!  One company's 1,2,3 pin counting may be another company's 3, 2, 1

    numbering for "non-square" packages...be careful & beware..it will get you

     

     

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

  • in reply to e14candies

    I know what the datasheet says and have tested it to be correct.

     

    My question is how to make the footprint in eagle conform to the datasheet since the datasheet footprint doesn’t currently seem to exist.

     

    Thanks,

    tim

  • in reply to Former Member

    On 18/08/14 21:34, tim wilkerson wrote:

    I know what the datasheet says and have tested it to be correct.

     

    My question is how to make the footprint in eagle conform to the

    datasheet since the datasheet footprint doesn’t currently seem to exist.

     

    Read up on creating your own library parts. This is part of the standard

    workflow of ALL circuit design tools and an essential part of the job.

    It's covered by all the Eagle tutorials including the one that came with

    the install. And luckily it's fairly easy to do.

     

    In your case, especially, you can very easily tweak (a copy of) the

    not-quite-right device to have your required pin-out as a package option.

     

     

  • in reply to Former Member

    Create a new (empty) library and copy the package and the symbol into the new library.

    In the new library, create a new device which uses the that package and symbol.

    You don't need to edit the package or the symbol. In the device, just make the right connections between the pads of the package and the pins of the symbol.

     

    Regards,

    Joop