ISO6721BDR

{
  "schema_version": 1,
  "type": "component",
  "slug": "iso6721bdr",
  "title": "ISO6721BDR",
  "brief": "Texas Instruments Digital Isolators, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "comm-uart",
    "iso6721bdr"
  ],
  "component": {
    "mpn": "ISO6721BDR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Comm/UART",
    "subcategory": "Digital Isolators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2302281530_Texas-Instruments-ISO6721BDR_C5216430.pdf",
    "parts": {
      "symbol": "iso6721bdr.kicad_sym",
      "footprint": "iso6721bdr.kicad_mod",
      "model_3d": "iso6721bdr-etched.glb",
      "model_3d_plain": "iso6721bdr.glb",
      "model_3d_step": "iso6721bdr-etched.step",
      "model_3d_step_plain": "iso6721bdr.step",
      "lbr": "iso6721bdr.lbr"
    },
    "distributor_links": {
      "digikey": "296-ISO6721BDRTR-ND",
      "lcsc": "C5216430"
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC1",
        "type": "power_in",
        "description": "Side-1 (input side of channel A / output side of channel B) power supply. Operating range 1.71-1.89 V or 2.25-5.5 V referenced to GND1. Bypass locally with a low-ESR ceramic capacitor to GND1."
      },
      {
        "number": "2",
        "name": "OUTA",
        "type": "output",
        "description": "Side-1 isolated digital output of channel A (forward channel driven by INA on side 2). Push-pull CMOS output; IOH up to 4 mA (VCCO=5 V), IOL up to 4 mA. Defaults HIGH when input power/signal is lost."
      },
      {
        "number": "3",
        "name": "INB",
        "type": "input",
        "description": "Side-1 digital input of channel B (forward direction on side 1). CMOS/LVCMOS compatible logic input; VIH ≥ 0.7×VCC1, VIL ≤ 0.3×VCC1. Drives OUTB across the isolation barrier."
      },
      {
        "number": "4",
        "name": "GND1",
        "type": "power_in",
        "description": "Side-1 ground return for VCC1. Isolated from GND2 by the SiO2 capacitive barrier (3000 VRMS, UL 1577)."
      },
      {
        "number": "5",
        "name": "GND2",
        "type": "power_in",
        "description": "Side-2 ground return for VCC2. Isolated from GND1 by the SiO2 capacitive barrier (3000 VRMS, UL 1577)."
      },
      {
        "number": "6",
        "name": "OUTB",
        "type": "output",
        "description": "Side-2 isolated digital output of channel B (driven by INB on side 1). Push-pull CMOS output; IOH up to 4 mA (VCCO=5 V), IOL up to 4 mA. Defaults HIGH when input power/signal is lost."
      },
      {
        "number": "7",
        "name": "INA",
        "type": "input",
        "description": "Side-2 digital input of channel A (reverse direction relative to channel B). CMOS/LVCMOS compatible logic input; VIH ≥ 0.7×VCC2, VIL ≤ 0.3×VCC2. Drives OUTA across the isolation barrier."
      },
      {
        "number": "8",
        "name": "VCC2",
        "type": "power_in",
        "description": "Side-2 (input side of channel A / output side of channel B) power supply. Operating range 1.71-1.89 V or 2.25-5.5 V referenced to GND2. VCC1 and VCC2 can be set independently. Bypass locally with a low-ESR ceramic capacitor to GND2."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2302281530_Texas-Instruments-ISO6721BDR_C5216430.pdf",
        "pages": 50,
        "sha256": "7c2da9379961a24d",
        "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": [
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        "file": "iso6721bdr.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": "iso6721bdr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.9,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b63b73a55f5e230983746230f5d920ac0670aefb1d1eef43ed8860a77cf7d5af",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "Comm/UART",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "iso6721bdr"
  ],
  "discovery_pitch": "ISO6721BDR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "iso6721bdr.kicad_sym",
    "iso6721bdr.kicad_mod",
    "iso6721bdr.glb",
    "iso6721bdr.step",
    "iso6721bdr-etched.step",
    "iso6721bdr.lbr",
    "docs/hero.png",
    "docs/iso6721bdr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "ISO6721BDR",
      "kind": "packaging"
    },
    {
      "mpn": "ISO6721BDRD",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T23:04:08.407Z"
}