UM3488EESA

{
  "schema_version": 1,
  "type": "component",
  "slug": "um3488eesa",
  "title": "UM3488EESA",
  "brief": "Union Semiconductor RS-485/RS-422 ICs, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "comm-uart",
    "um3488eesa"
  ],
  "component": {
    "mpn": "UM3488EESA",
    "manufacturer": "Union Semiconductor",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Comm/UART",
    "subcategory": "RS-485/RS-422 ICs",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2203221830_Union-Semiconductor-UM3488EESA_C2983278.pdf",
    "parts": {
      "symbol": "um3488eesa.kicad_sym",
      "footprint": "um3488eesa.kicad_mod",
      "model_3d": "um3488eesa-etched.glb",
      "model_3d_plain": "um3488eesa.glb",
      "model_3d_step": "um3488eesa-etched.step",
      "model_3d_step_plain": "um3488eesa.step",
      "lbr": "um3488eesa.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input. Operating range 3.135V ≤ VCC ≤ 3.465V (nominal +3.3V ±5%). Absolute maximum +7V. Typical quiescent current 180µA."
      },
      {
        "number": "2",
        "name": "RO",
        "type": "output",
        "description": "Receiver output. RO is high when the receiver differential input A−B ≥ −50mV, and low when A−B ≤ −200mV. CMOS-level output; VOH ≥ VCC−0.4V at IO=−4mA, VOL ≤ 0.4V at IO=4mA."
      },
      {
        "number": "3",
        "name": "DI",
        "type": "input",
        "description": "Driver input. A logic low on DI forces the non-inverting output (Y) low and the inverting output (Z) high; a logic high on DI drives Y high and Z low. VIH ≥ 2.0V, VIL ≤ 0.8V, ~100mV input hysteresis."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference. All voltages are referred to this pin unless otherwise noted."
      },
      {
        "number": "5",
        "name": "Y",
        "type": "output",
        "description": "Non-inverting differential driver output (RS-422). Driven high or low relative to Z per DI state, always enabled on UM3488 (no DE pin). ±15kV HBM ESD protected; short-circuit current ±250mA."
      },
      {
        "number": "6",
        "name": "Z",
        "type": "output",
        "description": "Inverting differential driver output (RS-422), complementary to Y. Always enabled on UM3488. ±15kV HBM ESD protected; short-circuit current ±250mA."
      },
      {
        "number": "7",
        "name": "B",
        "type": "input",
        "description": "Inverting differential receiver input (RS-422). Together with A forms the receiver differential pair; VTH typ −125mV. Fail-safe guarantees RO=high if the bus is open, shorted, or terminated with no active driver. 1/8-unit-load input (RIN ≥ 96kΩ) allowing 256 transceivers on the bus."
      },
      {
        "number": "8",
        "name": "A",
        "type": "input",
        "description": "Non-inverting differential receiver input (RS-422). Together with B forms the receiver differential pair. Common-mode range −7V to +12V; ±15kV HBM ESD protected; 1/8-unit-load (RIN ≥ 96kΩ)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2203221830_Union-Semiconductor-UM3488EESA_C2983278.pdf",
        "pages": 17,
        "sha256": "64342b95d538e6d2",
        "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Union Semiconductor",
      "Package": "SOP-8",
      "Category": "Comm/UART",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "um3488eesa"
  ],
  "discovery_pitch": "UM3488EESA (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",
    "um3488eesa.kicad_sym",
    "um3488eesa.kicad_mod",
    "um3488eesa.glb",
    "um3488eesa.step",
    "um3488eesa.lbr",
    "docs/hero.png",
    "docs/um3488eesa-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "um3488eesa-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "UM3488EESA",
      "kind": "packaging"
    },
    {
      "mpn": "UM3488EESAEEPA",
      "kind": "packaging"
    },
    {
      "mpn": "UM3488EESAEESE",
      "kind": "packaging"
    },
    {
      "mpn": "UM3488EESAEEPE",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T13:47:29.788Z"
}