UM803RS

{
  "schema_version": 1,
  "type": "component",
  "slug": "um803rs",
  "title": "UM803RS",
  "brief": "Union Semiconductor Supervisor and Reset ICs, SOT-23-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "um803rs"
  ],
  "component": {
    "mpn": "UM803RS",
    "manufacturer": "Union Semiconductor",
    "package": "SOT-23-3",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Supervisor and Reset ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/248d9e273ce45647956cc63ce6b1cb42.pdf",
    "parts": {
      "symbol": "um803rs.kicad_sym",
      "footprint": "um803rs.kicad_mod",
      "model_3d": "um803rs-etched.glb",
      "model_3d_plain": "um803rs.glb",
      "model_3d_step": "um803rs-etched.step",
      "model_3d_step_plain": "um803rs.step",
      "lbr": "um803rs.lbr"
    },
    "distributor_links": {
      "lcsc": "C620009"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V)."
      },
      {
        "number": "2",
        "name": "RESET",
        "type": "output",
        "description": "Active-low, open-drain reset output. Remains low while VCC is below the reset threshold (typ 2.63 V for the R version) and for at least 140 ms after VCC rises above the threshold. Requires an external pull-up resistor; the pull-up may be tied to a rail higher than VCC. VOL ≤ 0.3 V at ISINK = 50 µA with VCC ≥ 1.0 V."
      },
      {
        "number": "3",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply and monitored voltage. Absolute max −0.3 V to +6.0 V; operating range 1.0 V to 5.5 V. The R version monitors a nominal +3.0 V rail (reset threshold 2.63 V typ)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/248d9e273ce45647956cc63ce6b1cb42.pdf",
        "pages": 12,
        "sha256": "064b0eaa669a8ef8",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-3@sha256:ab2ce7041629a2c0",
      "mark": "drawn"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Union Semiconductor",
      "Package": "SOT-23-3",
      "Category": "PMIC",
      "Pins": "3"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "um803rs"
  ],
  "discovery_pitch": "UM803RS (Union Semiconductor) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "um803rs.kicad_sym",
    "um803rs.kicad_mod",
    "um803rs.glb",
    "um803rs.step",
    "um803rs-etched.step",
    "um803rs.lbr",
    "docs/hero.png",
    "docs/um803rs-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "UM803RS",
      "kind": "packaging"
    },
    {
      "mpn": "UM803RSRP",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T13:47:46.587Z"
}