MAX3485 RS-485 Transceiver

{
  "schema_version": 1,
  "type": "component",
  "slug": "max3485",
  "title": "MAX3485 RS-485 Transceiver",
  "brief": "3.3 V half-duplex RS-485/RS-422 transceiver, up to 10 Mbps, with driver and receiver enables.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "rs-485",
    "rs-422",
    "transceiver",
    "interface",
    "3.3v",
    "adi",
    "soic-8"
  ],
  "component": {
    "mpn": "MAX3485",
    "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/MAX3483-MAX3491.pdf",
    "parts": {
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      "lbr": "max3485.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver Output. If A > B by 200mV, RO will be high; if A < B by 200mV, RO will be low. Drives to VOH = VCC - 0.4V (min) at IOUT = -1.5mA."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver Output Enable (active-low). RO is enabled when RE is low; RO is high-impedance when RE is high. VIH = 2.0V min, VIL = 0.8V max."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver Output Enable. Driver outputs A and B are enabled when DE is high and high-impedance when DE is low. VIH = 2.0V min, VIL = 0.8V max."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver Input. A low on DI forces output A low and output B high; a high on DI forces output A high and output B low. VIH = 2.0V min, VIL = 0.8V max."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Noninverting Receiver Input and Noninverting Driver Output (half-duplex). Differential bus pin; -7V to +12V common-mode range; VOD (differential driver output) = 1.5V min with RL = 54Ω."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting Receiver Input and Inverting Driver Output (half-duplex). Differential bus pin; -7V to +12V common-mode range; complementary to A."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive Supply: 3.0V ≤ VCC ≤ 3.6V. ICC ≈ 1.1mA typ (2.2mA max) with no load."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/MAX3483-MAX3491.pdf",
        "pages": 17,
        "sha256": "e648fd27831d1ba1",
        "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": [
      {
        "file": "max3485.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": "max3485-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
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        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Half-duplex RS-485/RS-422 transceiver",
      "Supply voltage": "3.0 V to 3.6 V",
      "Data rate": "Up to 10 Mbps",
      "Bus": "Differential A / B, up to 32 nodes",
      "Enables": "Separate driver (DE) and receiver (RE)",
      "Operating temperature": "-40 C to 85 C"
    }
  },
  "sections": [
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  "discovery_triggers": [
    "RS-485 transceiver",
    "differential bus",
    "Modbus",
    "half-duplex 485",
    "long-distance serial"
  ],
  "discovery_pitch": "A 3.3 V RS-485 transceiver for robust differential multidrop serial over long cables, up to 10 Mbps.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "files": [
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  "variants": [
    {
      "mpn": "MAX3485CSA",
      "kind": "unknown"
    },
    {
      "mpn": "MAX3485ESA",
      "kind": "unknown"
    },
    {
      "mpn": "MAX3485CPA",
      "kind": "unknown"
    },
    {
      "mpn": "MAX3485EPA",
      "kind": "unknown"
    },
    {
      "mpn": "MAX3485C/D",
      "kind": "unknown"
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}