Changed PCF8574 footprint filter, added a package variant
Changed the PCF8574 footprint filters to include package sizes. This symbol covers both the P and T types which only differ in their package, but not in their footprint.
Added PCF8574TS variant with SSOP-20 package as an additional symbol. I created it as an extra symbol because of the incompatible footprint to the existing PCF8574 (P/T) variants in the library.
I did not break up the original PCF8574 in the library into the PCF8574P (PDIP-16) and PCF8574T (SO-16) variants to avoid breaking existing projects which use these symbols. Of course I can do that if required.
Datasheet under http://www.nxp.com/documents/data_sheet/PCF8574_PCF8574A.pdf
All contributions to the kicad library must follow the KiCad library convention
Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:
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Provide a URL to a datasheet for the symbol(s) you are contributing -
An example screenshot image is very helpful -
Ensure that the associated footprints match the official footprint library - A new fitting footprint must be submitted if the library does not yet contain one.
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If there are matching footprint PRs, provide link(s) as appropriate -
Check the output of the Travis automated check scripts - fix any errors as required -
Give a reason behind any intentional library convention rule violation.