ST485ERBDR

{
  "schema_version": 1,
  "type": "component",
  "slug": "st485erbdr",
  "title": "ST485ERBDR",
  "brief": "STMicroelectronics RS-485 / RS-422 ICs, SO-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "st485erbdr"
  ],
  "component": {
    "mpn": "ST485ERBDR",
    "manufacturer": "STMicroelectronics",
    "package": "SO-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2003182032_STMicroelectronics-ST485ERBDR_C495230.pdf",
    "parts": {
      "symbol": "st485erbdr.kicad_sym",
      "footprint": "st485erbdr.kicad_mod",
      "model_3d": "st485erbdr-etched.glb",
      "model_3d_plain": "st485erbdr.glb",
      "model_3d_step": "st485erbdr-etched.step",
      "model_3d_step_plain": "st485erbdr.step",
      "lbr": "st485erbdr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver output. CMOS logic-level output representing the received differential state on A/B. High-impedance when RE is high (receiver disabled). VOH ≥ 3.5 V @ IO = -4 mA; VOL ≤ 0.4 V @ IO = 4 mA."
      },
      {
        "number": "2",
        "name": "~RE",
        "type": "input",
        "description": "Receiver output enable (active-low). Drive low to enable RO; drive high to place RO in high-impedance. Logic input: VIH ≥ 2.0 V, VIL ≤ 0.8 V, IIN ≈ ±2 µA."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable (active-high). Drive high to enable the A/B differential driver outputs; drive low to place the driver outputs in high-impedance (3-state). Logic input: VIH ≥ 2.0 V, VIL ≤ 0.8 V."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver input. CMOS logic-level input; when DE is high, DI = H drives B low and A high, DI = L drives B high and A low. VIH ≥ 2.0 V, VIL ≤ 0.8 V."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for supply and all signal levels."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting receiver input and non-inverting driver output of the RS-485/RS-422 differential bus. Withstands ±15 kV HBM / ±8 kV IEC-1000-4-2 ESD and -7 V to +12 V common-mode bus voltage. Receiver threshold VTH ±0.2 V referenced to B; input resistance ≥ 24 kΩ."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting receiver input and inverting driver output of the RS-485/RS-422 differential bus. Withstands ±15 kV HBM / ±8 kV IEC-1000-4-2 ESD and -7 V to +12 V common-mode bus voltage. Complementary to A."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage input, nominal 5 V (absolute maximum 7 V). Decouple locally to GND. Typical no-load supply current 300 µA (VDE = 0 V)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2003182032_STMicroelectronics-ST485ERBDR_C495230.pdf",
        "pages": 19,
        "sha256": "6a5826d2bdc7896c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "st485erbdr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.4,
          4.9,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "53b055ee4d166c0b9de551669cc1294f95b96baacbfe26d9316b576c1ce29fbf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "st485erbdr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.9,
          1.1
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "15089b64a6badb9e68e0ca4e01bef33ee9dc5f6fc3e7bc20515fcac17732d950",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SO-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "variants": [
    {
      "mpn": "ST485ERBDR",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "st485erbdr"
  ],
  "discovery_pitch": "ST485ERBDR (STMicroelectronics) 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",
    "st485erbdr.kicad_sym",
    "st485erbdr.kicad_mod",
    "st485erbdr.glb",
    "st485erbdr.step",
    "st485erbdr.lbr",
    "docs/hero.png",
    "docs/st485erbdr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T08:26:21.708Z"
}