TPS3705-33DR

{
  "schema_version": 1,
  "type": "component",
  "slug": "tps3705-33dr",
  "title": "TPS3705-33DR",
  "brief": "Texas Instruments Supervisor and Reset ICs, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "tps3705-33dr"
  ],
  "component": {
    "mpn": "TPS3705-33DR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "PMIC",
    "subcategory": "Supervisor and Reset ICs",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2001160831_Texas-Instruments-TPS3705-33DR_C464810.pdf",
    "parts": {
      "symbol": "tps3705-33dr.kicad_sym",
      "footprint": "tps3705-33dr.kicad_mod",
      "model_3d": "tps3705-33dr-etched.glb",
      "model_3d_plain": "tps3705-33dr.glb",
      "model_3d_step": "tps3705-33dr-etched.step",
      "model_3d_step_plain": "tps3705-33dr.step",
      "lbr": "tps3705-33dr.lbr"
    },
    "distributor_links": {
      "digikey": "296-26940-2-ND",
      "lcsc": "C464810"
    },
    "pins": [
      {
        "number": "1",
        "name": "MR",
        "type": "input",
        "description": "Manual reset input (active low). Driving this pin low asserts RESET for the fixed 200 ms reset timeout period. Internally pulled up; can be left open if unused."
      },
      {
        "number": "2",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input. Recommended operating range 2 V to 6 V (absolute max 7 V). Nominal supply current 50 μA max. Monitored against internal fixed threshold V_IT+ = 2.93 V (3.3 V option)."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference. All voltage measurements are with respect to GND."
      },
      {
        "number": "4",
        "name": "PFI",
        "type": "input",
        "description": "Power-fail comparator input. Compared against an internal reference (typ. 1.25 V); a resistor divider from the monitored rail sets the trip point. Drives PFO low when V_PFI falls below the reference."
      },
      {
        "number": "5",
        "name": "PFO",
        "type": "output",
        "description": "Power-fail comparator output (active low). Open-drain/push-pull digital output that asserts low when V_PFI is below the internal reference, providing early warning of an impending supply loss or low-battery condition."
      },
      {
        "number": "6",
        "name": "WDI",
        "type": "input",
        "description": "Watchdog timer input. Must be toggled by the host within the watchdog timeout window; missing an edge causes WDO to assert. Can be left floating to disable watchdog function."
      },
      {
        "number": "7",
        "name": "RESET",
        "type": "output",
        "description": "Active-low reset output. Asserted low while V_DD is below V_IT+ or during power-up (V_DD < 1.1 V), and held low for the fixed 200 ms timeout after V_DD returns above V_IT+. Also asserted by MR low."
      },
      {
        "number": "8",
        "name": "WDO",
        "type": "output",
        "description": "Watchdog timer output (active low). Asserted low when WDI has not toggled within the watchdog timeout period, signaling a host lockup."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2001160831_Texas-Instruments-TPS3705-33DR_C464810.pdf",
        "pages": 29,
        "sha256": "4a3d7db6b372dd6a",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "tps3705-33dr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tps3705-33dr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6da8a318449590d281ce6f33557a77b6bd888b775fac3fb1a8fd89778cb825c8",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "PMIC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tps3705-33dr"
  ],
  "discovery_pitch": "TPS3705-33DR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
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    "tps3705-33dr.glb",
    "tps3705-33dr.step",
    "tps3705-33dr-etched.step",
    "tps3705-33dr.lbr",
    "docs/hero.png",
    "docs/tps3705-33dr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "TPS3705-33DR",
      "kind": "packaging"
    },
    {
      "mpn": "TPS3705-33DGN",
      "kind": "unknown"
    },
    {
      "mpn": "TPS3705-33DGNR",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-25T11:59:44.011Z"
}