ADM3485

{
  "schema_version": 1,
  "type": "component",
  "slug": "adm3485",
  "title": "ADM3485",
  "brief": "ADI 3.3 V RS-485/RS-422 transceiver, SOIC-8. Half-duplex, up to 12 Mbps, 32 nodes. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "rs-485",
    "rs-422",
    "transceiver",
    "soic-8",
    "analog-devices"
  ],
  "component": {
    "mpn": "ADM3485",
    "manufacturer": "Analog Devices",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 transceiver",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/ADM3483_3485_3488_3490_3491.pdf",
    "parts": {
      "symbol": "adm3485.kicad_sym",
      "footprint": "adm3485.kicad_mod",
      "model_3d": "adm3485-etched.glb",
      "model_3d_plain": "adm3485.glb",
      "model_3d_step": "adm3485-etched.step",
      "model_3d_step_plain": "adm3485.step",
      "lbr": "adm3485.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver Output. When the receiver is enabled (RE low), if A − B > 200 mV then RO = high; if A − B < −200 mV then RO = low. Drives CMOS logic levels referenced to VCC (3.3 V)."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver Output Enable (active low). A low level enables the receiver output RO; a high level places it in high impedance. If RE is high and DE is low, the device enters low power shutdown mode."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver Output Enable (active high). A high level enables the differential driver outputs A and B; a low level places them in high impedance. If RE is high and DE is low, the device enters low power shutdown mode."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver Input. With the driver enabled (half-duplex), a logic low on DI forces A low and B high; a logic high on DI forces A high and B low. CMOS input, VIH ≥ 2.0 V, VIL ≤ 0.8 V."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for the transceiver."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Noninverting Receiver Input A and Noninverting Driver Output A (shared bus pin in half-duplex operation). Bus common-mode range −7 V to +12 V; receiver input impedance 12 kΩ minimum."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting Receiver Input B and Inverted Driver Output B (shared bus pin in half-duplex operation). Bus common-mode range −7 V to +12 V; receiver input impedance 12 kΩ minimum."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Power Supply, 3.3 V ± 0.3 V. Absolute maximum 7 V to GND. Typical ICC = 1.1 mA."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/ADM3483_3485_3488_3490_3491.pdf",
        "pages": 20,
        "sha256": "e7fcba7f9a3919f7",
        "source_tier": "mfr"
      },
      "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": "adm3485.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "adm3485-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d913cc0657c39e2be403a46097970ab29566f00d915eba2683e51cd43dc2da0e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "RS-485 / RS-422 transceiver (half-duplex)",
      "Supply": "3.3 V",
      "Data rate": "Up to 12 Mbps",
      "Bus loading": "Up to 32 nodes",
      "Enables": "DE (driver), RE (receiver)",
      "Fail-safe": "Receiver defined for open/short/idle",
      "Package": "SOIC-8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "adm3485",
    "rs-485 transceiver",
    "3.3v rs485",
    "half duplex rs485"
  ],
  "discovery_pitch": "ADI ADM3485 3.3 V RS-485/RS-422 transceiver (SOIC-8) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
  },
  "files": [
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    "adm3485.lbr",
    "docs/hero.png",
    "docs/adm3485-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "adm3485-etched.step"
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}