TPS3823

{
  "schema_version": 1,
  "type": "component",
  "slug": "tps3823",
  "title": "TPS3823",
  "brief": "TI voltage supervisor with watchdog, SOT-23-5. Fixed reset threshold, 200 ms reset, windowless watchdog. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power",
    "supervisor",
    "reset-ic",
    "watchdog",
    "sot-23-5",
    "texas-instruments"
  ],
  "component": {
    "mpn": "TPS3823",
    "manufacturer": "Texas Instruments",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management",
    "subcategory": "Voltage supervisor",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tps3823.pdf",
    "parts": {
      "symbol": "tps3823.kicad_sym",
      "footprint": "tps3823.kicad_mod",
      "model_3d": "tps3823-etched.glb",
      "model_3d_plain": "tps3823.glb",
      "model_3d_step": "tps3823-etched.step",
      "model_3d_step_plain": "tps3823.step",
      "lbr": "tps3823.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RESET",
        "type": "output",
        "description": "Active-low reset output, push-pull. Asserts low while VDD is below the negative-going threshold VIT- (e.g. 2.93 V nominal for TPS3823-33) and remains low for the delay time td (200 ms nom) after VDD rises above the threshold. Also asserts on MR pulled low or on watchdog time-out."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / device return."
      },
      {
        "number": "3",
        "name": "MR",
        "type": "input",
        "description": "Manual reset input, active low. Pulling MR low forces RESET low; RESET remains asserted while MR is low and for the delay time td after MR returns high. Has an internal ~90 kOhm pullup to VDD, so it can be left unconnected or tied to VDD when unused."
      },
      {
        "number": "4",
        "name": "WDI",
        "type": "input",
        "description": "Watchdog timer input. Must be toggled (rising or falling edge) within the watchdog time-out t_tout (1.6 s nominal for TPS3823) or a reset is triggered. If WDI is left floating the device internally generates pulses to prevent a watchdog reset; WDI must be driven fully high or fully low for the watchdog to detect an error."
      },
      {
        "number": "5",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input. Powers the device and is the monitored rail. Recommended operating range 1.1 V to 5.5 V (absolute max 6 V). Place a 0.1 uF ceramic bypass capacitor close to this pin for best threshold stability."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tps3823.pdf",
        "pages": 34,
        "sha256": "3351e38aaf2f0a71",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tps3823.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tps3823-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "87e981cc008fedbeef6a85c8d2090a45500a3ed4ef4ba645dc64b455fd6cfce3",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Voltage supervisor + watchdog",
      "Threshold": "Fixed (order code)",
      "Reset delay": "200 ms (typ)",
      "Watchdog": "WDI time-out",
      "Manual reset": "MR input",
      "Output": "Active-low RESET",
      "Supply": "1.1-5.5 V",
      "Package": "SOT-23-5"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tps3823",
    "voltage supervisor watchdog",
    "reset ic with watchdog",
    "mcu supervisor"
  ],
  "discovery_pitch": "TI TPS3823 voltage supervisor with watchdog (SOT-23-5) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tps3823.kicad_sym",
    "tps3823.kicad_mod",
    "tps3823.glb",
    "tps3823.step",
    "tps3823.lbr",
    "docs/hero.png",
    "docs/tps3823-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tps3823-etched.step"
  ],
  "variants": [
    {
      "mpn": "TPS3823-33DBVR (3.3 V)",
      "kind": "packaging"
    },
    {
      "mpn": "TPS3823-50DBVR (5.0 V)",
      "kind": "packaging"
    },
    {
      "mpn": "TPS3823A-33DBVR (active-high reset)",
      "kind": "packaging"
    }
  ]
}