ISO7421ED

{
  "slug": "iso7421ed",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Digital Isolators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "communication interface chip-uart-485-232",
    "iso7421ed",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "iso7421ed.kicad_sym",
    "iso7421ed.kicad_mod",
    "iso7421ed.glb",
    "iso7421ed.step",
    "iso7421ed.lbr",
    "docs/hero.png",
    "docs/iso7421ed-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "iso7421ed-hero.glb",
    "iso7421ed-hero.overlay.json",
    "iso7421ed-etched.glb"
  ],
  "component": {
    "mpn": "ISO7421ED",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Digital Isolators",
    "datasheet": "https://www.ti.com/cn/lit/gpn/iso7421e",
    "parts": {
      "symbol": "iso7421ed.kicad_sym",
      "footprint": "iso7421ed.kicad_mod",
      "model_3d": "iso7421ed-hero.glb",
      "model_3d_plain": "iso7421ed-etched.glb",
      "model_3d_step": "iso7421ed-etched.step",
      "model_3d_step_plain": "iso7421ed.step",
      "lbr": "iso7421ed.lbr"
    },
    "distributor_links": {
      "lcsc": "C2872813",
      "digikey": "296-28425-ND",
      "mouser": "595-ISO7421ED"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T12:24:00Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-28425-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-ISO7421ED",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC1",
        "type": "power_in",
        "description": "Power supply for side 1 (VCC1), recommended 3.0 V to 5.5 V with respect to GND1."
      },
      {
        "number": "2",
        "name": "OUTA",
        "type": "output",
        "description": "Channel A output on side 1, rated for up to ±4 mA recommended output current."
      },
      {
        "number": "3",
        "name": "INB",
        "type": "input",
        "description": "Channel B input on side 1, with high-level input voltage of 2 V to 5.5 V and low-level of 0 V to 0.8 V."
      },
      {
        "number": "4",
        "name": "GND1",
        "type": "power_in",
        "description": "Ground connection for VCC1."
      },
      {
        "number": "5",
        "name": "GND2",
        "type": "power_in",
        "description": "Ground connection for VCC2."
      },
      {
        "number": "6",
        "name": "OUTB",
        "type": "output",
        "description": "Channel B output on side 2, rated for up to ±4 mA recommended output current."
      },
      {
        "number": "7",
        "name": "INA",
        "type": "input",
        "description": "Channel A input on side 2, with high-level input voltage of 2 V to 5.5 V and low-level of 0 V to 0.8 V."
      },
      {
        "number": "8",
        "name": "VCC2",
        "type": "power_in",
        "description": "Power supply for side 2 (VCC2), recommended 3.0 V to 5.5 V with respect to GND2."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet pin table for ISO7421x places INA on pin 7 and OUTA on pin 2 (differs from ISO7420x). The "
        ],
        "pages_sent": 9,
        "cost_usd": 0.1068,
        "at": "2026-10-31T12:23:45"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/iso7421e",
        "pages": 35,
        "sha256": "947d3a765c7e0123",
        "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": "iso7421ed.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": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "iso7421ed-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": "3c8f64f5b2a8beb9d86c1aa41a6074dfd9c263c72492ef3becf5cfab753b07d2",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "D",
      "source_page": 32,
      "D": {
        "nom_mm": 4.902,
        "range_mm": [
          4.801,
          5.004
        ]
      },
      "E1": {
        "nom_mm": 3.899,
        "range_mm": [
          3.81,
          3.988
        ]
      },
      "E": {
        "nom_mm": 5.994,
        "range_mm": [
          5.791,
          6.198
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.753,
        "range_mm": [
          null,
          1.753
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "iso7421ed.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}