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Implements #183 for SGM2036-1.2YUDH4G/TR, one of the actual parts in the issue's linked UTDFN-4-EP(1x1) catalog list.
Adds
utdfn4, the catalog spellingUTDFN-4-EP(1x1), and the typedfp().utdfn()builder. Geometry follows SGMICRO's TX00066.000 recommended land pattern: 0.48mm square thermal pad rotated 45°, three chamfered corner pads, and the distinct extended pin 1 at lower left in the top view. Includes refdes, courtyard, a pin-1 silkscreen marker, and optional exposed-pad omission.Reference: SGM2036 datasheet, PDF pages 5 (pinout) and 19 (land pattern). This implements that specific land pattern; the README explains that another manufacturer's 1x1mm package may differ.
Validation: eight new tests plus existing DFN/corner-pad/WSON coverage: 15 passed, 79 assertions. Checks pad bounds, pin numbering, diamond side length, at least 0.2mm signal-to-thermal clearance, aliases, modifiers and unsupported pin counts. Seven new cases fail on original main because
utdfnis unsupported. Two SVG snapshots included and the default render visually checked against the drawing. ESM/declaration build and formatting pass.GitHub CI also passes all four checks on
f2075885c3dfa53f11218f26c8754362faa68421: 572 tests passed, 0 failed, build, format check and format workflow. Test run.The issue mentions a possible $10 bounty. Please confirm eligibility if this contribution is accepted.