UM3483EESA

{
  "schema_version": 1,
  "type": "component",
  "slug": "um3483eesa",
  "title": "UM3483EESA",
  "brief": "Union Semiconductor RS-485 / RS-422 ICs, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "um3483eesa"
  ],
  "component": {
    "mpn": "UM3483EESA",
    "manufacturer": "Union Semiconductor",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2111101130_Union-Semiconductor-UM3483EESA_C2916271.pdf",
    "parts": {
      "symbol": "um3483eesa.kicad_sym",
      "footprint": "um3483eesa.kicad_mod",
      "model_3d": "um3483eesa-etched.glb",
      "model_3d_plain": "um3483eesa.glb",
      "model_3d_step": "um3483eesa-etched.step",
      "model_3d_step_plain": "um3483eesa.step",
      "lbr": "um3483eesa.lbr"
    },
    "distributor_links": {
      "lcsc": "C2916271"
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver Output. CMOS logic-level output of the RS-485 receiver. VOH ≥ VCC-1.5V at IOUT=-1.5mA; VOL ≤ 0.4V at IOUT=2.5mA. High-impedance when /RE is high; fail-safe high when inputs are open, shorted, or idle."
      },
      {
        "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. Combined with DE=low, forces the device into low-power shutdown (ISHDN = 1µA)."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver Output Enable (active high). Drive high to enable the differential driver outputs A and B; drive low to place them in high-impedance. Combined with /RE=high, forces the device into low-power shutdown."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver Input. CMOS logic-level input to the RS-485 driver. VIH ≥ 2.0V, VIL ≤ 0.8V. Logic level on DI is transmitted differentially onto A/B when DE is high."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0V) for the device."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting differential RS-485 bus line. Driver output when DE=high, receiver input when /RE=low. Common-mode operating range -7V to +12V; ±15kV HBM / ±15kV IEC61000-4-2 air-gap / ±8kV IEC61000-4-2 contact ESD protected."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting differential RS-485 bus line. Driver output when DE=high, receiver input when /RE=low. Common-mode operating range -7V to +12V; ±15kV HBM / ±15kV IEC61000-4-2 air-gap / ±8kV IEC61000-4-2 contact ESD protected."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, +3V to +5.5V operating range (+7V absolute max). Typical operating supply current 300µA (no load). Bypass with a local decoupling capacitor to GND."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2111101130_Union-Semiconductor-UM3483EESA_C2916271.pdf",
        "pages": 18,
        "sha256": "b365bb8b2878eac1",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "um3483eesa.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "um3483eesa-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "57a13d8a90c1555e535a3d81a374e7f8d373e18b6b94e2c25ebd6e192bdc2840",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Union Semiconductor",
      "Package": "SOP-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "um3483eesa"
  ],
  "discovery_pitch": "UM3483EESA (Union Semiconductor) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "um3483eesa.kicad_sym",
    "um3483eesa.kicad_mod",
    "um3483eesa.glb",
    "um3483eesa.step",
    "um3483eesa-etched.step",
    "um3483eesa.lbr",
    "docs/hero.png",
    "docs/um3483eesa-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "UM3483EESA",
      "kind": "packaging"
    },
    {
      "mpn": "UM3486EESA",
      "kind": "unknown"
    },
    {
      "mpn": "UM3483EEPA",
      "kind": "unknown"
    },
    {
      "mpn": "UM3486EEPA",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-25T13:47:21.298Z"
}