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added Texas LM74 temperature sensor

Fabio Rossi requested to merge efferre/kicad-symbols:LM74 into master

I have created the symbol for LM74, it comes in two flavors because it can use two footprints, it is not possible to derive one of the two symbols because of incompatible pin names. One footprint is currently missing so I have created a new PR for it.

  • Provide a URL to a datasheet for the symbol(s) you are contributing

datasheet

  • An example screenshot image is very helpful

image

  • 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.
  • If there are matching footprint PRs, provide link(s) as appropriate

PR for the DSBGA footprint

  • Check the output of the automated check scripts - fix any errors as required

no errors during validation of KLC:

$ python ../kicad-library-utils/klc-check/check_symbol.py Sensor_Temperature.kicad_sym -vv -c LM74_DSBGA --footprints ../kicad-footprints/
Checking symbol 'Sensor_Temperature:LM74_DSBGA':
$ python ../kicad-library-utils/klc-check/check_symbol.py Sensor_Temperature.kicad_sym -vv -c LM74_SOIC --footprints ../kicad-footprints/
Checking symbol 'Sensor_Temperature:LM74_SOIC':
$

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