ISOW7721DFMR

{
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  "type": "component",
  "slug": "isow7721dfmr",
  "title": "ISOW7721DFMR",
  "brief": "Texas Instruments Digital Isolators (With Power), SOIC-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "signal isolation devices",
    "isow7721dfmr",
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  "component": {
    "mpn": "ISOW7721DFMR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-20",
    "pin_count": 20,
    "category": "Signal Isolation Devices",
    "subcategory": "Digital Isolators (With Power)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8597547427327467520",
    "parts": {
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      "lbr": "isow7721dfmr.lbr"
    },
    "distributor_links": {
      "lcsc": "C7290753",
      "digikey": "296-ISOW7721DFMRTR-ND",
      "mouser": "595-ISOW7721DFMR"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T20:52:28Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-ISOW7721DFMRTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-ISOW7721DFMR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIO",
        "type": "power_in",
        "description": "Side 1 logic supply voltage."
      },
      {
        "number": "2",
        "name": "INA",
        "type": "input",
        "description": "Input channel A."
      },
      {
        "number": "3",
        "name": "OUTB",
        "type": "output",
        "description": "Output channel B."
      },
      {
        "number": "4",
        "name": "EN_IO1",
        "type": "input",
        "description": "Output Enable 1; when high or open the channel output pin on side 1 is enabled, when low the output is in high impedance state and transmitter is disabled."
      },
      {
        "number": "5",
        "name": "EN",
        "type": "bidirectional",
        "description": "Power converter enable input pin; DC-DC power converter is enabled when high to VIO voltage level and disabled when low at GND1 voltage level."
      },
      {
        "number": "6",
        "name": "GNDIO",
        "type": "power_in",
        "description": "Ground connection for VIO; GND1 and GNDIO need to be shorted on board."
      },
      {
        "number": "7",
        "name": "LF",
        "type": "input",
        "description": "Multiple device primary/secondary control logic; connect to GND1 when used as primary device or to VDD if used as secondary device."
      },
      {
        "number": "8",
        "name": "CC",
        "type": "bidirectional",
        "description": "Multiple device primary/secondary synchronization pin; when LF is set to GND1 CC is an output, when LF is set to VDD CC is an input."
      },
      {
        "number": "9",
        "name": "VDD",
        "type": "power_in",
        "description": "Side 1 DC-DC converter power supply voltage."
      },
      {
        "number": "10",
        "name": "GND1",
        "type": "power_in",
        "description": "Ground connection for VDD; GND1 and GNDIO need to be shorted on board."
      },
      {
        "number": "11",
        "name": "GND2",
        "type": "power_in",
        "description": "Ground connection for VISOOUT; GND2 and GISOIN pins can be shorted on board or connected through a ferrite bead."
      },
      {
        "number": "12",
        "name": "VISOOUT",
        "type": "power_out",
        "description": "Isolated power converter output voltage; VISOIN and VISOOUT pins can be shorted on board or connected through a ferrite bead."
      },
      {
        "number": "13",
        "name": "VSEL",
        "type": "input",
        "description": "VISOOUT selection pin; VISOOUT = 5 V when VSEL shorted to VISOOUT, VISOOUT = 3.3 V when VSEL shorted to GND2."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No Connect."
      },
      {
        "number": "15",
        "name": "GISOIN",
        "type": "power_in",
        "description": "Ground connection for VISOIN; GND2 and GISOIN pins can be shorted on board or connected through a ferrite bead."
      },
      {
        "number": "16",
        "name": "NC",
        "type": "unconnected",
        "description": "No Connect."
      },
      {
        "number": "17",
        "name": "EN_IO2",
        "type": "input",
        "description": "Output Enable 2; when high or open the channel output pin on side 2 is enabled, when low the output is in high impedance state and transmitter is disabled."
      },
      {
        "number": "18",
        "name": "INB",
        "type": "input",
        "description": "Input channel B."
      },
      {
        "number": "19",
        "name": "OUTA",
        "type": "output",
        "description": "Output channel A."
      },
      {
        "number": "20",
        "name": "VISOIN",
        "type": "power_in",
        "description": "Side 2 supply voltage for isolation channels; VISOIN and VISOOUT pins can be shorted on board or connected through a ferrite bead."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 9,
        "cost_usd": 0.1077,
        "at": "2026-10-05T20:52:12"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8597547427327467520",
        "pages": 56,
        "sha256": "23d359783521eebd",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-20",
      "Category": "Signal Isolation Devices",
      "Pins": "20"
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "ISOW7721DFMR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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}