Support asymmetric SOT-343 pad geometry

src/fn/index.ts

@@ -93,6 +93,7 @@ export { smdpinheader } from "./smdpinheader"
 export { platedhole } from "./platedhole"
 export { sot } from "./sot"
 export { sot343 } from "./sot343"
+export { sot343bfp650 } from "./sot343bfp650"
 export { m2host } from "./m2host"
 export { mountedpcbmodule } from "./mountedpcbmodule"
 export { to92l } from "./to92l"

src/fn/sot343bfp650.ts

@@ -0,0 +1,52 @@
+import type { AnyCircuitElement, PcbCourtyardRect } from "circuit-json"
+import { z } from "zod"
+import { rectpad } from "../helpers/rectpad"
+import { silkscreenRef } from "../helpers/silkscreenRef"
+import { silkscreenpath } from "../helpers/silkscreenpath"
+import { base_def } from "../helpers/zod/base_def"
+
+export const sot343bfp650_def = base_def.extend({
+  fn: z.literal("sot343bfp650"),
+  num_pins: z.literal(4).default(4),
+})
+
+export const sot343bfp650 = (
+  rawParams: z.input<typeof sot343bfp650_def>,
+): { circuitJson: AnyCircuitElement[]; parameters: any } => {
+  const parameters = sot343bfp650_def.parse(rawParams)
+  const pads = [
+    rectpad(1, -0.65, -1, 0.7, 0.7),
+    rectpad(2, 0.5, -1, 0.9, 0.7),
+    rectpad(3, 0.65, 1, 0.7, 0.7),
+    rectpad(4, -0.65, 1, 0.7, 0.7),
+  ]
+  const silkscreen = [
+    silkscreenpath([
+      { x: -1, y: -0.2 },
+      { x: -1, y: 0.2 },
+    ]),
+    silkscreenpath([
+      { x: 1, y: 0.2 },
+      { x: 1, y: -0.2 },
+    ]),
+  ]
+  const courtyard: PcbCourtyardRect = {
+    type: "pcb_courtyard_rect",
+    pcb_courtyard_rect_id: "",
+    pcb_component_id: "",
+    center: { x: 0, y: 0 },
+    width: 3,
+    height: 3.2,
+    layer: "top",
+  }
+
+  return {
+    circuitJson: [
+      ...pads,
+      ...silkscreen,
+      silkscreenRef(0, 2.1, 0.4),
+      courtyard,
+    ],
+    parameters,
+  }
+}

src/footprinter.ts

@@ -312,6 +312,7 @@ export type Footprinter = {
   sot323: () => FootprinterParamsBuilder<"w" | "h" | "p" | "pl" | "pw">
   sot89: () => FootprinterParamsBuilder<"w" | "p" | "pl" | "pw" | "h">
   sot343: () => FootprinterParamsBuilder<"w" | "h" | "p" | "pl" | "pw">
+  sot343bfp650: () => FootprinterParamsBuilder<never>
   sod323w: () => FootprinterParamsBuilder<"w" | "h" | "p" | "pl" | "pw">
   smc: () => FootprinterParamsBuilder<"w" | "h" | "p" | "pw" | "pl">
   minimelf: () => FootprinterParamsBuilder<"w" | "h" | "p" | "pw" | "pl">

tests/sot343bfp650.test.ts

@@ -0,0 +1,19 @@
+import { expect, test } from "bun:test"
+import { convertCircuitJsonToPcbSvg } from "circuit-to-svg"
+import { fp } from "../src/footprinter"
+
+test("sot343bfp650 matches C151520", () => {
+  const circuitJson = fp.string("sot343bfp650").circuitJson()
+  const pads = circuitJson.filter((element) => element.type === "pcb_smtpad")
+
+  expect(pads).toHaveLength(4)
+  expect(pads[0]).toMatchObject({ x: -0.65, y: -1, width: 0.7, height: 0.7 })
+  expect(pads[1]).toMatchObject({ x: 0.5, y: -1, width: 0.9, height: 0.7 })
+  expect(pads[2]).toMatchObject({ x: 0.65, y: 1, width: 0.7, height: 0.7 })
+  expect(pads[3]).toMatchObject({ x: -0.65, y: 1, width: 0.7, height: 0.7 })
+
+  expect(convertCircuitJsonToPcbSvg(circuitJson)).toMatchSvgSnapshot(
+    import.meta.path,
+    "sot343bfp650_c151520",
+  )
+})