main
Ray Set visibility: public 73a7bbf 5h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "sgm803b-txn3lg",
  "title": "SGM803B-TXN3LG",
  "brief": "SGMICRO Supervisor And Reset ICs, SOT-23. 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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    "mpn": "SGM803B-TXN3LG",
    "manufacturer": "SGMICRO",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Supervisor And Reset ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757039304701435904",
    "parts": {
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      "footprint": "sgm803b-txn3lg.kicad_mod",
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      "lbr": "sgm803b-txn3lg.lbr"
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    "distributor_links": {
      "lcsc": "C699599"
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    "distributor_check": {
      "checked_at": "2026-10-17T15:26:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the supervisory circuit."
      },
      {
        "number": "2",
        "name": "nRESET",
        "type": "output",
        "description": "Active-low reset output for the SGM803B, which is an open-drain output; it is held low when VCC falls below the reset threshold and keeps low for 240ms (TYP) after VCC exceeds the threshold."
      },
      {
        "number": "3",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage pin, specified from 1V (TA = +25℃) to 5.5V, or 1.1V to 5.5V over -40℃ to +125℃."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "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 MPN SGM803B-TXN3LG maps to the SOT-23 package (ordering table, page 2: SGM803B-TXN3LG/TR, 3.08 V; The page 4 pin configuration figure text is garbled and lists the nRESET/RESET label at position 1, ; The pin description for VCC in the source gives the supply range in the electrical characteristics t"
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        "cost_usd": 0.0435,
        "at": "2026-10-17T15:25:16"
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        "pages": 13,
        "sha256": "f6a70cf4f20d9637",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "file": "sgm803b-txn3lg.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sgm803b-txn3lg-etched.step",
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        "sha256": "7960ce359b9880071872403f46d7b286fed96b8decca6869c9ce18f42feabe29",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  "metadata": {
    "specs": {
      "Manufacturer": "SGMICRO",
      "Package": "SOT-23",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
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      "source": "datasheet",
      "datasheet_sha256": "f6a70cf4f20d9637868a5a7339d8f92b401351d8c2b886558812b7f1218920b6",
      "rows": [
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          "name": "Supply voltage (VCC), TA = +25℃",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1,
          "typ": null,
          "max": 5.5,
          "conditions": "TA = +25℃",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage (VCC), TA = -40℃ to +125℃",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.1,
          "typ": null,
          "max": 5.5,
          "conditions": "TA = -40℃ to +125℃",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply current, SGM8_R/S/T",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 300,
          "max": 430,
          "conditions": "VCC < 3.6V, SGM8_R/S/T, TA = +25℃",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Supply current, SGM8_R/S/T",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 590,
          "conditions": "VCC < 3.6V, SGM8_R/S/T, TA = -40℃ to +125℃",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reset voltage threshold, SGM8_T",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 3.001,
          "typ": 3.08,
          "max": 3.151,
          "conditions": "VCC falling, TA = +25℃",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reset voltage threshold, SGM8_T",
          "symbol": "",
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          "min": 2.966,
          "typ": null,
          "max": 3.181,
          "conditions": "VCC falling, TA = -40℃ to +125℃",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reset active timeout period",
          "symbol": "",
          "kind": "timing",
          "unit": "ms",
          "min": 150,
          "typ": 240,
          "max": 370,
          "conditions": "TA = +25℃",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reset active timeout period",
          "symbol": "",
          "kind": "timing",
          "unit": "ms",
          "min": 120,
          "typ": null,
          "max": 400,
          "conditions": "TA = -40℃ to +125℃",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "RESET/nRESET output voltage low (SGM803B-R/S/T)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "VCC = VTH(MIN), ISINK = 1.2mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "RESET/nRESET output voltage low (SGM803B-R/S/T/M/J)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "VCC > 1V, ISINK = 50μA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reset output low / input supply voltage: VCC absolute maximum",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "RESET, nRESET voltage",
          "symbol": "RESET, nRESET",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Maximum printed as VCC + 0.3V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Rate of rise, VCC",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V/μs",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Junction temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Lead temperature (soldering)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10s",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Package thermal resistance, junction-to-ambient (SOT-23-3)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "SOT-23-3",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "SGM803B-TXN3LG (SGMICRO) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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}