TPS3851H18SQDRBRQ1

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  "type": "component",
  "slug": "tps3851h18sqdrbrq1",
  "title": "TPS3851H18SQDRBRQ1",
  "brief": "Texas Instruments Supervisor And Reset ICs, SON-8-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "TPS3851H18SQDRBRQ1",
    "manufacturer": "Texas Instruments",
    "package": "SON-8-EP(3x3)",
    "pin_count": 9,
    "category": "Power Management (PMIC)",
    "subcategory": "Supervisor And Reset ICs",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tps3851-q1",
    "parts": {
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      "lbr": "tps3851h18sqdrbrq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C2066728",
      "digikey": "296-46975-2-ND",
      "mouser": "595-S3851H18SQDRBRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T20:11:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-46975-2-ND",
        "status": "found",
        "lifecycle": "Active"
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      "mouser": {
        "pn": "595-S3851H18SQDRBRQ1",
        "status": "found"
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    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply voltage pin; 1.6V to 6.5V input range; recommended to connect 0.1µF bypass capacitor for noisy systems."
      },
      {
        "number": "2",
        "name": "CWD",
        "type": "input",
        "description": "Programmable watchdog timeout input; connect capacitor to GND for user-programmable timeout or 10kΩ pull-up to VDD for factory preset timing."
      },
      {
        "number": "3",
        "name": "MR",
        "type": "input",
        "description": "Manual reset input; logic low level triggers RESET; internally pulled up."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin; thermal pad internally connected to GND."
      },
      {
        "number": "5",
        "name": "SET1",
        "type": "input",
        "description": "Logic input for watchdog enable/disable control; grounding this pin disables the watchdog timer."
      },
      {
        "number": "6",
        "name": "WDI",
        "type": "input",
        "description": "Watchdog input; falling edge must occur before watchdog timeout (tWD) expires; must be driven to VDD or GND when unused."
      },
      {
        "number": "7",
        "name": "WDO",
        "type": "output",
        "description": "Watchdog output (open-drain); goes low after watchdog timeout; connect with 1kΩ to 100kΩ pull-up resistor to VPU."
      },
      {
        "number": "8",
        "name": "RESET",
        "type": "output",
        "description": "Reset output (open-drain); goes low when VDD falls below VITN; connect with 1kΩ to 100kΩ pull-up resistor to VPU; RESET delay time (tRST) = 200ms typical."
      },
      {
        "number": "9",
        "name": "Thermal Pad",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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": [
          "exposed pad 9 added from the footprint"
        ],
        "pages_sent": 23,
        "cost_usd": 0.1591,
        "at": "2026-10-05T20:11:26"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/tps3851-q1",
        "pages": 39,
        "sha256": "187a2d3c4a847f7d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SON-8-EP(3x3)",
      "Category": "Power Management (PMIC)",
      "Pins": "9"
    }
  },
  "variants": [],
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  "discovery_pitch": "TPS3851H18SQDRBRQ1 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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