LTC2909ITS8-3.3#TRPBF

{
  "slug": "ltc2909its8-3-3-trpbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices Monitors & Reset Circuits, TSOT-23-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "ltc2909its8-3.3#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ltc2909its8-3-3-trpbf.kicad_sym",
    "ltc2909its8-3-3-trpbf.kicad_mod",
    "ltc2909its8-3-3-trpbf.glb",
    "ltc2909its8-3-3-trpbf.step",
    "ltc2909its8-3-3-trpbf.lbr",
    "docs/hero.png",
    "docs/ltc2909its8-3-3-trpbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ltc2909its8-3-3-trpbf-hero.glb",
    "ltc2909its8-3-3-trpbf-hero.overlay.json",
    "ltc2909its8-3-3-trpbf-etched.glb"
  ],
  "component": {
    "mpn": "LTC2909ITS8-3.3#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "TSOT-23-8",
    "pin_count": 8,
    "category": "Power Management ICs",
    "subcategory": "Monitors & Reset Circuits",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/2909fb.pdf",
    "parts": {
      "symbol": "ltc2909its8-3-3-trpbf.kicad_sym",
      "footprint": "ltc2909its8-3-3-trpbf.kicad_mod",
      "model_3d": "ltc2909its8-3-3-trpbf-hero.glb",
      "model_3d_plain": "ltc2909its8-3-3-trpbf-etched.glb",
      "model_3d_step": "ltc2909its8-3-3-trpbf-etched.step",
      "model_3d_step_plain": "ltc2909its8-3-3-trpbf.step",
      "lbr": "ltc2909its8-3-3-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C683202",
      "digikey": "505-LTC2909ITS8-3.3#TRPBFTR-ND",
      "mouser": "584-C2909ITS8-3.3TPF"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T21:13:37Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-LTC2909ITS8-3.3#TRPBFTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-C2909ITS8-3.3TPF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ADJ1",
        "type": "input",
        "description": "Adjustable monitor input with a 0.5V threshold (VRT 0.4925V to 0.5075V), an input current of at most ±15nA at 0.55V, and an absolute maximum terminal voltage of -0.3V to 7.5V."
      },
      {
        "number": "2",
        "name": "ADJ2",
        "type": "input",
        "description": "Second adjustable monitor input with a 0.5V threshold (VRT 0.4925V to 0.5075V), an input current of at most ±15nA at 0.55V, and an absolute maximum terminal voltage of -0.3V to 7.5V."
      },
      {
        "number": "3",
        "name": "REF",
        "type": "output",
        "description": "Buffered 1V reference output (0.985V to 1.015V) for negative-supply offset, valid when VCC is above 2.175V, with a terminal current limit of ±1mA."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for all device voltages."
      },
      {
        "number": "5",
        "name": "RST",
        "type": "output",
        "description": "Open-drain active-low reset output, with VOL of 0.15V max at VCC=1V and 100µA and 0.30V max at VCC=3V and 2.5mA, high-level leakage of ±1µA max, and an absolute maximum of 7.5V."
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply input monitored by the UVLO threshold (2.175V to 2.250V for the -2.5 part, 2.871V to 2.970V for the -3.3 part, 4.350V to 4.500V for the -5 part), with an absolute maximum of 6V and a 6.5V internal shunt regulator; supplies above 6V require a series dropping resistor."
      },
      {
        "number": "7",
        "name": "TMR",
        "type": "passive",
        "description": "Reset timeout programming pin: tying it to GND selects the internal 200ms (typ) timeout, a capacitor sets an external timeout (20ms typ at 2.2nF), and tying it to VCC disables the timer, with an absolute maximum of VCC+0.3V and pull-up/pull-down currents of about 2.1µA."
      },
      {
        "number": "8",
        "name": "SEL",
        "type": "input",
        "description": "Three-state input that sets each ADJ input polarity: below 0.4V for GND, above 1.4V for VCC, and left open for mixed polarity (about 0.9V), with an absolute maximum of 7.5V and input current of ±25µA."
      }
    ],
    "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 datasheet describes the TMR pin's timeout modes (GND, capacitor, VCC) in the electrical table an; SEL is a three-state input; KiCad has no direct three-state input class, so 'input' was chosen. Veri; RST is stated as open-drain; it is classed as 'output' here. The datasheet does not specify a pull-u"
        ],
        "pages_sent": 3,
        "cost_usd": 0.0485,
        "at": "2026-10-30T21:13:28"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/2909fb.pdf",
        "pages": 16,
        "sha256": "35475090990f5abb",
        "source_tier": "mfr"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "ltc2909its8-3-3-trpbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dc644a91883054d8f75e38542e63c2050dc8f2e8b7f12e1c57dcd93245fbd473",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ltc2909its8-3-3-trpbf-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "a09f88d7dd8cbefd9d810a4aba8f99aafbe5fe26806c0d37bb026dd9e4ddabac",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "TS8",
      "source_page": 15,
      "D": {
        "nom_mm": 2.9,
        "range_mm": [
          null,
          null
        ]
      },
      "E1": {
        "nom_mm": 1.625,
        "range_mm": [
          1.5,
          1.75
        ]
      },
      "E": {
        "nom_mm": 2.8,
        "range_mm": [
          null,
          null
        ]
      },
      "e": {
        "nom_mm": 0.65,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.0,
        "range_mm": [
          null,
          1.0
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "ltc2909its8-3-3-trpbf.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}