LT1785AIS8#PBF

{
  "slug": "lt1785ais8-pbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices RS-485/RS-422 ICs, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "communication interface chip-uart-485-232",
    "lt1785ais8#pbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lt1785ais8-pbf.kicad_sym",
    "lt1785ais8-pbf.kicad_mod",
    "lt1785ais8-pbf.glb",
    "lt1785ais8-pbf.step",
    "lt1785ais8-pbf.lbr",
    "docs/hero.png",
    "docs/lt1785ais8-pbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lt1785ais8-pbf-hero.glb",
    "lt1785ais8-pbf-hero.overlay.json",
    "lt1785ais8-pbf-etched.glb"
  ],
  "component": {
    "mpn": "LT1785AIS8#PBF",
    "manufacturer": "Analog Devices",
    "package": "SO-8",
    "pin_count": 8,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "RS-485/RS-422 ICs",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/LT1785-1785A-1791-1791A.pdf",
    "parts": {
      "symbol": "lt1785ais8-pbf.kicad_sym",
      "footprint": "lt1785ais8-pbf.kicad_mod",
      "model_3d": "lt1785ais8-pbf-hero.glb",
      "model_3d_plain": "lt1785ais8-pbf-etched.glb",
      "model_3d_step": "lt1785ais8-pbf-etched.step",
      "model_3d_step_plain": "lt1785ais8-pbf.step",
      "lbr": "lt1785ais8-pbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C579884",
      "digikey": "505-LT1785AIS8#PBF-ND",
      "mouser": "584-LT1785AIS8#PBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T16:57:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-LT1785AIS8#PBF-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT1785AIS8#PBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver output is TTL level, high when receiver input A is at least 200mV above B and low when A is at least 200mV below B, goes high impedance when RE is high or the part is powered off, and is protected from output shorts from ground to 6V."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver output enable is a TTL level input where logic low enables RO and logic high places RO in high impedance, and it must be tied low for CAN bus applications to prevent shutdown."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable is a TTL level input where logic high enables the driver outputs A and B (Y and Z on LT1791) and logic low places them in high impedance, and it is the data input in CAN bus operation."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver input is a TTL level input where logic high drives output A or Y high and B or Z low, with complementary states for logic low, and it should be tied low for CAN bus applications."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the transceiver."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Driver output A and receiver input A, protected against voltage faults between ±60V, with the receiver forcing RO high when V(A) ≥ V(B) + 200mV and low when V(A) ≤ V(B) - 200mV."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Driver output B and receiver input B, protected against voltage faults between ±60V, with the receiver forcing RO low when V(A) ≤ V(B) - 200mV and high when V(A) ≥ V(B) + 200mV."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input requiring 4.75V ≤ VCC ≤ 5.25V for RS422 or RS485 operation, decoupled with a 0.1µF low ESR capacitor directly at this pin."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 18,
        "cost_usd": 0.0249,
        "at": "2026-10-28T16:57:46"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/LT1785-1785A-1791-1791A.pdf",
        "pages": 18,
        "sha256": "50c2d3317a147414",
        "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": "lt1785ais8-pbf.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": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lt1785ais8-pbf-etched.step",
        "role": "eda",
        "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": "d358ddc79ee7ad7bb793f887e7c670f4baaee44a59ab0840321d1629bc568766",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}