SN75LBC184DR

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn75lbc184dr",
  "title": "SN75LBC184DR",
  "brief": "UMW 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",
    "sn75lbc184dr"
  ],
  "component": {
    "mpn": "SN75LBC184DR",
    "manufacturer": "UMW",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/6268fd3b04a26fa19cd9a396dc71be9d.pdf",
    "parts": {
      "symbol": "sn75lbc184dr.kicad_sym",
      "footprint": "sn75lbc184dr.kicad_mod",
      "model_3d": "sn75lbc184dr-etched.glb",
      "model_3d_plain": "sn75lbc184dr.glb",
      "model_3d_step": "sn75lbc184dr-etched.step",
      "model_3d_step_plain": "sn75lbc184dr.step",
      "lbr": "sn75lbc184dr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "R",
        "type": "output",
        "description": "Receiver output. Drives logic HIGH when V(A) - V(B) >= 0.2 V (asserted differential), LOW when V(A) - V(B) <= -0.2 V, high-impedance when /RE is HIGH, and HIGH (fail-safe) when the A/B inputs are open. IOH = -8 mA, IOL = 4 mA."
      },
      {
        "number": "2",
        "name": "/RE",
        "type": "input",
        "description": "Receiver output enable, active LOW. LOW enables the receiver output R; HIGH places R in high-impedance. Recommended VIH >= 2 V, VIL <= 0.8 V."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver enable, active HIGH. HIGH enables the differential bus driver so A/B follow D; LOW disables the driver and places A/B in high-impedance. Recommended VIH >= 2 V, VIL <= 0.8 V."
      },
      {
        "number": "4",
        "name": "D",
        "type": "input",
        "description": "Driver data input. When DE is HIGH: D=HIGH drives A HIGH / B LOW, D=LOW drives A LOW / B HIGH. Slew-rate-controlled output stage limits data rate to ~250 kbps to allow longer stubs in noisy environments."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for supply and logic. Also the return for the on-chip transient voltage suppression network on A/B (protected to +/-15 kV air-gap ESD and 400-W surge)."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting differential bus I/O (RS-485/RS-422). Driver output when DE is HIGH, receiver non-inverting input when /RE is LOW. Continuous voltage tolerance -15 V to +15 V; recommended common-mode range -7 V to +12 V. Includes integrated TVS clamping."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting differential bus I/O (RS-485/RS-422). Driver output when DE is HIGH, receiver inverting input when /RE is LOW. Continuous voltage tolerance -15 V to +15 V; recommended common-mode range -7 V to +12 V. Includes integrated TVS clamping."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage. Recommended 4.75 V to 5.25 V (5 V nominal). ICC typ 12 mA active, 175 uA (300 uA max) with the driver and receiver both disabled."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/6268fd3b04a26fa19cd9a396dc71be9d.pdf",
        "pages": 23,
        "sha256": "53d77bcd7a987620",
        "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": "sn75lbc184dr.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": "sn75lbc184dr-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": "05bf0f3509fc1fd7641c775f87007a8b278723d23a86201340e549c94f53c227",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "SOP-8",
      "Category": "Interface",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sn75lbc184dr"
  ],
  "discovery_pitch": "SN75LBC184DR (UMW) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn75lbc184dr.kicad_sym",
    "sn75lbc184dr.kicad_mod",
    "sn75lbc184dr.glb",
    "sn75lbc184dr.step",
    "sn75lbc184dr-etched.step",
    "sn75lbc184dr.lbr",
    "docs/hero.png",
    "docs/sn75lbc184dr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SN75LBC184DRD",
      "kind": "packaging"
    },
    {
      "mpn": "SN75LBC184DR",
      "kind": "packaging"
    },
    {
      "mpn": "SN75LBC184DRP",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T07:53:34.037Z"
}