understanding/interpreting the mechanical drawings of parts

[arunkumar413]

Hi Team,

I know schematic design but the only problem is understanding and interpreting the mechanical drawings of the electronic components. I couldn't find much documentation on the internet to convert the component's drawings into a PCB footprint. There are simple tutorials like land pattern but there aren't any tutorials for complex package types. Could you please guide me on how to learn, understand and interpret the drawings and convert them to a footprint.

Thanks
Arun

 

[Pommie]

It would help if we knew what software package you are using.

Mike.

 

[dougy83]

Can you give an example of the component you're having trouble with?

 

[arunkumar413]

I'm using KiCad because it's free. Also I'm trying to build a web based schematic editor and PCB (https://github.com/arunkumar413/Online-EDA/wiki)

 

[alec_t]

The datasheets of most components show land patterns and dimensions.

 

[arunkumar413]

Can you give an example of the component you're having trouble with?

there isn't any specific part. But I want to learn in general the complex parts. for example https://www.ti.com/product/TAS5414C-Q1/datasheet/abstract#SLOS6732569

 

[jpanhalt]

1) Find the actual datasheet: https://www.ti.com/lit/ds/symlink/tas5414c-q1.pdf

2) Scan to the part showung the recommended SMD footprint:

John

 

[arunkumar413]

what does the number 42x0.65 and 44x0.35 indicate?

 

[jpanhalt]

"42" is apparently the number of spaces (EDIT: it's 42, not 43 because there are two sides). "44" is the number of pins on that package. 0.65 mm is the center to center distance. 0.35 mm is the pad or stencil width for non-soldermask. Do you know what soldermask is and why it may not be desired for that package?

Try drawing the whole device in your new CAD program.