ST26C31BDR

{
  "schema_version": 1,
  "type": "component",
  "slug": "st26c31bdr",
  "title": "ST26C31BDR",
  "brief": "STMicroelectronics RS-485 / RS-422 ICs, SOIC-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "st26c31bdr"
  ],
  "component": {
    "mpn": "ST26C31BDR",
    "manufacturer": "STMicroelectronics",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://www.st.com/resource/en/datasheet/st26c31bdr.pdf",
    "parts": {
      "symbol": "st26c31bdr.kicad_sym",
      "footprint": "st26c31bdr.kicad_mod",
      "model_3d": "st26c31bdr-etched.glb",
      "model_3d_plain": "st26c31bdr.glb",
      "model_3d_step": "st26c31bdr-etched.step",
      "model_3d_step_plain": "st26c31bdr.step",
      "lbr": "st26c31bdr.lbr"
    },
    "distributor_links": {
      "lcsc": "C94192"
    },
    "pins": [
      {
        "number": "1",
        "name": "AIN",
        "type": "input",
        "description": "Channel A TTL/CMOS single-ended input. VIH >= 2 V, VIL <= 0.8 V. Drives the channel A differential output pair (AOUT / /AOUT)."
      },
      {
        "number": "2",
        "name": "AOUT",
        "type": "output",
        "description": "Channel A non-inverting differential (RS-422) output. 3-state; high impedance when enable inputs disable the driver. Drives balanced line loads (RL = 100 Ω typical)."
      },
      {
        "number": "3",
        "name": "/AOUT",
        "type": "output",
        "description": "Channel A inverting differential (RS-422) output (complement of AOUT). 3-state; high impedance when enable inputs disable the driver."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Active-high enable input. Together with /EN (pin 12) enables all four channel outputs. When EN = L and /EN = H, all outputs are placed in high-impedance (Z) state."
      },
      {
        "number": "5",
        "name": "/BOUT",
        "type": "output",
        "description": "Channel B inverting differential (RS-422) output (complement of BOUT). 3-state; high impedance when the driver is disabled."
      },
      {
        "number": "6",
        "name": "BOUT",
        "type": "output",
        "description": "Channel B non-inverting differential (RS-422) output. 3-state; high impedance when the driver is disabled."
      },
      {
        "number": "7",
        "name": "BIN",
        "type": "input",
        "description": "Channel B TTL/CMOS single-ended input. VIH >= 2 V, VIL <= 0.8 V. Drives the channel B differential output pair."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference (0 V). Common return for VCC and all I/O."
      },
      {
        "number": "9",
        "name": "CIN",
        "type": "input",
        "description": "Channel C TTL/CMOS single-ended input. VIH >= 2 V, VIL <= 0.8 V. Drives the channel C differential output pair."
      },
      {
        "number": "10",
        "name": "COUT",
        "type": "output",
        "description": "Channel C non-inverting differential (RS-422) output. 3-state; high impedance when the driver is disabled."
      },
      {
        "number": "11",
        "name": "/COUT",
        "type": "output",
        "description": "Channel C inverting differential (RS-422) output (complement of COUT). 3-state; high impedance when the driver is disabled."
      },
      {
        "number": "12",
        "name": "/EN",
        "type": "input",
        "description": "Active-low enable input. Together with EN (pin 4) enables all four channel outputs. When EN = L and /EN = H, all outputs are placed in high-impedance (Z) state."
      },
      {
        "number": "13",
        "name": "/DOUT",
        "type": "output",
        "description": "Channel D inverting differential (RS-422) output (complement of DOUT). 3-state; high impedance when the driver is disabled."
      },
      {
        "number": "14",
        "name": "DOUT",
        "type": "output",
        "description": "Channel D non-inverting differential (RS-422) output. 3-state; high impedance when the driver is disabled."
      },
      {
        "number": "15",
        "name": "DIN",
        "type": "input",
        "description": "Channel D TTL/CMOS single-ended input. VIH >= 2 V, VIL <= 0.8 V. Drives the channel D differential output pair."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage. Recommended 4.5 to 5.5 V (nominal 5 V); absolute max 7 V. Typical quiescent supply current 200 µA (max 500 µA) with static inputs."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/st26c31bdr.pdf",
        "pages": 15,
        "sha256": "628b38556e56079d",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -4.445
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-16_3.9x9.9mm_P1.27mm@sha256:f9b5075740f7816c",
      "mark": "drawn"
    },
    "models_3d": [
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        "file": "st26c31bdr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "st26c31bdr-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",
        "sha256": "74c0e742a295b7915f2d3fa073f1f406b7aba97b2318d8d48cec8e29cb6132dd",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SOIC-16",
      "Category": "Interface",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "st26c31bdr"
  ],
  "discovery_pitch": "ST26C31BDR (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "st26c31bdr.kicad_sym",
    "st26c31bdr.kicad_mod",
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    "st26c31bdr.step",
    "st26c31bdr-etched.step",
    "st26c31bdr.lbr",
    "docs/hero.png",
    "docs/st26c31bdr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "ST26C31BDR",
      "kind": "packaging"
    },
    {
      "mpn": "ST26C31BN",
      "kind": "unknown"
    },
    {
      "mpn": "ST26C31BTR",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-25T08:24:33.758Z"
}