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SOT223 and pins

autodeskguest

Hi,

 

I know we can assign a pin to two or more pads. Sometimes this is

necessary, indeed.

 

For example a SOT223 has four pads and usually the middle is connected

to the exposed one.

 

In the schematic makes no sense to show two pins: let's think a mosfet

with two drains....

 

What do you do to make the schematic readable and the layout correct

(e.g. both pads connected) ?

 

Thanks

Marco / iw2nzm

 

Parents

  • Marco Trapanese ha scritto:

     

    Clench your teeth, put the multiple pins in the symbol, and with time

    you'll get used to it....

     

     

    Furthermore there is another bad thing. Many voltage regulator share the

    same packages. So it would be nice to have only one device with several

    variants, one for each package version.

     

    Simply it is not possible. TO92 or TO220 have three pins, SOT223 has

    four pins (GND pin and GND tab) so they can't live togheter. Ok, I need

    two devices. But let me say it's a "bit" trivial...

     

    Marco / iw2nzm

     

Reply

  • Marco Trapanese ha scritto:

     

    Clench your teeth, put the multiple pins in the symbol, and with time

    you'll get used to it....

     

     

    Furthermore there is another bad thing. Many voltage regulator share the

    same packages. So it would be nice to have only one device with several

    variants, one for each package version.

     

    Simply it is not possible. TO92 or TO220 have three pins, SOT223 has

    four pins (GND pin and GND tab) so they can't live togheter. Ok, I need

    two devices. But let me say it's a "bit" trivial...

     

    Marco / iw2nzm

     

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