LM74502DDFR

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm74502ddfr",
  "title": "LM74502DDFR",
  "brief": "Texas Instruments Power Distribution Switches, TSOT-23-8. 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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    "power management (pmic)",
    "lm74502ddfr",
    "factory-2.0.0",
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  "component": {
    "mpn": "LM74502DDFR",
    "manufacturer": "Texas Instruments",
    "package": "TSOT-23-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "Power Distribution Switches",
    "datasheet": "https://www.ti.com/cn/lit/ds/symlink/lm74502.pdf",
    "parts": {
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      "footprint": "lm74502ddfr.kicad_mod",
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      "model_3d_plain": "lm74502ddfr.glb",
      "model_3d_step": "lm74502ddfr-etched.step",
      "model_3d_step_plain": "lm74502ddfr.step",
      "lbr": "lm74502ddfr.lbr"
    },
    "distributor_links": {
      "lcsc": "C3236215"
    },
    "pins": [
      {
        "number": "1",
        "name": "EN/UVLO",
        "type": "input",
        "description": "Enable/UVLO input; voltage above 1.24V (typical rising threshold) enables gate driver and charge pump; pulling below 0.64V (typical) enters low-IQ shutdown mode drawing 1µA."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin."
      },
      {
        "number": "3",
        "name": "N.C",
        "type": "unconnected",
        "description": "No connection pin."
      },
      {
        "number": "4",
        "name": "VCAP",
        "type": "output",
        "description": "Charge pump output for external gate drive; connect 0.1-0.22µF external capacitor; provides approximately 13V above VS with hysteresis between 11.6V and 12.4V."
      },
      {
        "number": "5",
        "name": "VS",
        "type": "power_in",
        "description": "Input power supply to controller; operates 3.2V to 65V with 3.9V power-on-reset rising threshold and -65V reverse voltage withstanding; requires 100nF bypass capacitor to GND."
      },
      {
        "number": "6",
        "name": "GATE",
        "type": "output",
        "description": "Gate drive output for external N-channel MOSFET; 60µA peak source current (LM74502) or 11mA (LM74502H), 2.37A peak sink current, 0-15V gate-to-source voltage rating."
      },
      {
        "number": "7",
        "name": "OV",
        "type": "input",
        "description": "Overvoltage protection threshold input; connect resistor divider from input supply to OV to ground to set threshold; rising comparator reference 1.25V, falling reference 1.14V."
      },
      {
        "number": "8",
        "name": "SRC",
        "type": "input",
        "description": "Source reference point for external back-to-back N-channel MOSFETs or high-side MOSFET source; withstands -65V to +65V voltage excursions for reverse polarity protection."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 30,
        "cost_usd": 0.2479,
        "at": "2026-09-18T02:33:57"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/ds/symlink/lm74502.pdf",
        "pages": 30,
        "sha256": "32a78dac63f4406b",
        "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"
    },
    "models_3d": [
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        "file": "lm74502ddfr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dc644a91883054d8f75e38542e63c2050dc8f2e8b7f12e1c57dcd93245fbd473",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm74502ddfr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
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        "sha256": "bc70ec9b8e3d5cb7e7176f0c4838f9b5843567d330968ccc8e4d3ba311370c94",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSOT-23-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm74502ddfr"
  ],
  "discovery_pitch": "LM74502DDFR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "lm74502ddfr.lbr",
    "docs/hero.png",
    "docs/lm74502ddfr-datasheet.pdf",
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-28T17:07:13.509Z"
}