SIT3485EUA

{
  "schema_version": 1,
  "type": "component",
  "slug": "sit3485eua",
  "title": "SIT3485EUA",
  "brief": "SIT RS-485 / RS-422 ICs, MSOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "sit3485eua"
  ],
  "component": {
    "mpn": "SIT3485EUA",
    "manufacturer": "SIT",
    "package": "MSOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/592cfd3a7634e1bbdda81738d147b395.pdf",
    "parts": {
      "symbol": "sit3485eua.kicad_sym",
      "footprint": "sit3485eua.kicad_mod",
      "model_3d": "sit3485eua-etched.glb",
      "model_3d_plain": "sit3485eua.glb",
      "model_3d_step": "sit3485eua-etched.step",
      "model_3d_step_plain": "sit3485eua.step",
      "lbr": "sit3485eua.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver Output. When enabled (RE low), RO outputs the logic level received from the differential bus (A-B). High-impedance when RE is high."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver Output Enable (active low). Drive low to enable the receiver output RO; drive high to place RO in high-impedance state."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver Output Enable (active high). Drive high to enable the driver outputs A and B; drive low to place them in high-impedance state."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver Input. Logic level applied here is transmitted onto the differential bus (A-B) when the driver is enabled (DE high)."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for the device."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting differential bus I/O (RS-485/RS-422). Driver output when DE is high; receiver input otherwise. Receiver output RO is high when V(A) - V(B) > +200 mV."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting differential bus I/O (RS-485/RS-422). Driver output when DE is high; receiver input otherwise. Receiver output RO is low when V(A) - V(B) < -200 mV."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage input, 3.0 V to 3.6 V (typ 3.3 V). Bypass with 0.1 uF to GND close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/592cfd3a7634e1bbdda81738d147b395.pdf",
        "pages": 13,
        "sha256": "5b55f1879c7f2a4b",
        "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": [
      {
        "file": "sit3485eua.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3.0,
          0.95
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "847c4c5023fe1603fbd36900a5dcc4bd3901ba473f71d42c9a469f0236eaadf3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sit3485eua-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3.0,
          0.95
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1fe519ebe36f7a107941f33abc7b9ca6851abe145398c12945e12d8f952ea30d",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "SIT",
      "Package": "MSOP-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sit3485eua"
  ],
  "discovery_pitch": "SIT3485EUA (SIT) 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",
    "sit3485eua.kicad_sym",
    "sit3485eua.kicad_mod",
    "sit3485eua.glb",
    "sit3485eua.step",
    "sit3485eua.lbr",
    "docs/hero.png",
    "docs/sit3485eua-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sit3485eua-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SIT3485EUA",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T06:04:10.978Z"
}