main
Ray Set visibility: public 8263e2c 5h ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "tps3851g33sdrbr",
  "title": "TPS3851G33SDRBR",
  "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",
  "tags": [
    "component",
    "power management (pmic)",
    "tps3851g33sdrbr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "TPS3851G33SDRBR",
    "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/lit/ds/symlink/tps3851.pdf",
    "parts": {
      "symbol": "tps3851g33sdrbr.kicad_sym",
      "footprint": "tps3851g33sdrbr.kicad_mod",
      "model_3d": "tps3851g33sdrbr-hero.glb",
      "model_3d_plain": "tps3851g33sdrbr-etched.glb",
      "model_3d_step": "tps3851g33sdrbr-etched.step",
      "model_3d_step_plain": "tps3851g33sdrbr.step",
      "lbr": "tps3851g33sdrbr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2066899",
      "digikey": "296-51953-2-ND",
      "mouser": "595-TPS3851G33SDRBR"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T23:42:55Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-51953-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-TPS3851G33SDRBR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage pin with a recommended operating range of 1.6 V to 6.5 V, and a 0.1 µF bypass capacitor is recommended for noisy systems."
      },
      {
        "number": "2",
        "name": "CWD",
        "type": "input",
        "description": "Programmable watchdog timeout input, where a capacitor to ground sets the timeout and a 10 kΩ resistor to VDD or leaving the pin unconnected selects preset timeouts."
      },
      {
        "number": "3",
        "name": "MR",
        "type": "input",
        "description": "Manual reset input, where a logical low issues a RESET, the pin is internally pulled up, and RESET stays low for tRST after MR is deasserted high."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "5",
        "name": "SET1",
        "type": "input",
        "description": "Logic input where grounding the pin disables the watchdog timer, and SET1 together with CWD selects the watchdog timeouts."
      },
      {
        "number": "6",
        "name": "WDI",
        "type": "input",
        "description": "Watchdog input where a falling edge must occur before tWD expires, and it must be driven to VDD or GND and cannot be left unconnected when the watchdog is disabled."
      },
      {
        "number": "7",
        "name": "WDO",
        "type": "output",
        "description": "Watchdog output that must be connected through a 1 kΩ to 100 kΩ pullup to VPU, goes low for tRST on a watchdog timeout, and is high-impedance when RESET goes low."
      },
      {
        "number": "8",
        "name": "RESET",
        "type": "output",
        "description": "Reset output that must be connected through a 1 kΩ to 100 kΩ pullup to VPU, goes low when VDD falls below VITN, and stays low until VDD is above VITN+VHYST and the RESET timeout completes."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
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    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The thermal pad is not given a pin number in Table 4-1 or Figure 4-1, so it is not listed in pins. T"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0201,
        "at": "2026-11-05T23:42:46"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tps3851.pdf",
        "pages": 36,
        "sha256": "293159a68e80dcf9",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "extents_mm": [
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        "footprint_binding": "identity",
        "sha256": "cbee016fb8ee69c44b13d8818fcf65dcf240f5fdca70b22700521eb617c5311a",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
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        "sha256": "69eeea2bcbe2874c01a9181224d9ee372312d73e43509c7bfdc341376bdcaa77",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SON-8-EP(3x3)",
      "Category": "Power Management (PMIC)",
      "Pins": "9"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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          "max": 6.5,
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          "name": "SET1 pin voltage",
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        {
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          "unit": "°C",
          "min": -40,
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          "max": 125,
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        {
          "name": "Supply voltage range",
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          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
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        {
          "name": "Output voltage range RESET, WDO",
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        {
          "name": "Voltage range SET1, WDI, MR",
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          "kind": "absolute_maximum",
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          "min": -0.3,
          "typ": null,
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          "source": "datasheet"
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        {
          "name": "Voltage range CWD",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Maximum VDD + 0.3 V or 7.0 V, whichever is smaller (footnote 3)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output pin current RESET, WDO",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "",
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          "source": "datasheet"
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        {
          "name": "Input current (all pins)",
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        {
          "name": "Operating junction temperature",
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          "conditions": "Footnote 2 applies",
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        {
          "name": "Operating free-air temperature",
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          "conditions": "Footnote 2 applies",
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        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
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        {
          "name": "Supply current",
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          "unit": "µA",
          "min": null,
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        {
          "name": "Supply voltage",
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        {
          "name": "Undervoltage threshold accuracy, entering RESET",
          "symbol": "VITN",
          "kind": "tolerance",
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          "min": -0.8,
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          "max": 0.8,
          "conditions": "VDD falling",
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          "name": "MR pin internal pullup current",
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          "name": "Power-on reset voltage",
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          "kind": "electrical",
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          "conditions": "IRESET = 15µA, VOL(MAX) = 0.25V",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "CWD pin charge current",
          "symbol": "ICWD",
          "kind": "electrical",
          "unit": "nA",
          "min": 347,
          "typ": 375,
          "max": 403,
          "conditions": "CWD = 0.5V",
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          "source": "datasheet"
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          "name": "CWD pin threshold voltage",
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          "kind": "electrical",
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          "min": 1.196,
          "typ": 1.21,
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          "source_page": 5,
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        {
          "name": "RESET, WDO output low",
          "symbol": "VOL",
          "kind": "electrical",
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          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "VDD = 5V, ISINK = 3mA",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "RESET, WDO output leakage current, open-drain",
          "symbol": "ID",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VDD = VITN + VHYST, VRESET = VWDO = 6.5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level input voltage (MR, SET1)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.25,
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        {
          "name": "High-level input voltage (MR, SET1)",
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          "kind": "electrical",
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          "min": 0.8,
          "typ": null,
          "max": null,
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        {
          "name": "CWD evaluation period",
          "symbol": "tINIT",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 381,
          "conditions": "Refer to Section 7.1.1.2",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Minimum MR, SET1 pin pulse duration",
          "symbol": "",
          "kind": "timing",
          "unit": "µs",
          "min": 1,
          "typ": null,
          "max": null,
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          "source_page": 6,
          "source": "datasheet"
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        {
          "name": "Reset timeout period",
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          "typ": 200,
          "max": 230,
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          "source_page": 6,
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        },
        {
          "name": "Watchdog timeout, CWD = NC, SET1 = 1",
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          "kind": "timing",
          "unit": "ms",
          "min": 1360,
          "typ": 1600,
          "max": 1840,
          "conditions": "CWD = NC, SET1 = 1",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Watchdog timeout, CWD = 10kΩ to VDD, SET1 = 1",
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          "kind": "timing",
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          "min": 170,
          "typ": 200,
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          "conditions": "CWD = 10kΩ to VDD, SET1 = 1",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 50.7,
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          "kind": "thermal",
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          "min": null,
          "typ": 25.8,
          "max": null,
          "conditions": "DRB (VSON) 8 pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-top characterization parameter",
          "symbol": "ψJT",
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          "min": null,
          "typ": 1.3,
          "max": null,
          "conditions": "DRB (VSON) 8 pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board characterization parameter",
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          "kind": "thermal",
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          "min": null,
          "typ": 25.8,
          "max": null,
          "conditions": "DRB (VSON) 8 pins",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Junction-to-case (bottom) thermal resistance",
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          "kind": "thermal",
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          "min": null,
          "typ": 7.1,
          "max": null,
          "conditions": "DRB (VSON) 8 pins",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "TPS3851G33SDRBR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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