LM2917N-8

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2917n-8",
  "title": "LM2917N-8",
  "brief": "Texas Instruments V/F And F/V Converters, PDIP-8. 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",
    "data acquisition",
    "lm2917n-8",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM2917N-8",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-8",
    "pin_count": 8,
    "category": "Data Acquisition",
    "subcategory": "V/F And F/V Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm2917-n",
    "parts": {
      "symbol": "lm2917n-8.kicad_sym",
      "footprint": "lm2917n-8.kicad_mod",
      "model_3d": "lm2917n-8-hero.glb",
      "model_3d_plain": "lm2917n-8.glb",
      "model_3d_step": "lm2917n-8-etched.step",
      "model_3d_step_plain": "lm2917n-8.step",
      "lbr": "lm2917n-8.lbr"
    },
    "distributor_links": {
      "lcsc": "C1518987",
      "digikey": "LM2917N-8-ND",
      "mouser": "926-LM2917N-8"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T17:47:05Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM2917N-8-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "926-LM2917N-8",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "TACH+",
        "type": "input",
        "description": "Positive terminal of the tachometer input signal, feeding the noninverting input of the internal Schmitt-trigger comparator."
      },
      {
        "number": "2",
        "name": "CP1",
        "type": "output",
        "description": "Charge-pump capacitor pin, charged to VCC/2 by a constant current source of 180 µA typical at the start of every positive half cycle and discharged at the same rate during negative half cycles."
      },
      {
        "number": "3",
        "name": "CP2/IN+",
        "type": "bidirectional",
        "description": "Shared pin on 8-pin devices serving as the noninverting input of the high-gain op amp, internally connected to the CP2 charge-pump node."
      },
      {
        "number": "4",
        "name": "EMIT",
        "type": "output",
        "description": "Emitter of the bipolar junction transistor, which is the floating transistor output of the op amp section."
      },
      {
        "number": "5",
        "name": "COL",
        "type": "input",
        "description": "Collector of the bipolar junction transistor; the collector may be taken above VCC up to a maximum VCE of 28 V."
      },
      {
        "number": "6",
        "name": "V+",
        "type": "power_in",
        "description": "Supply voltage pin; absolute maximum supply voltage is 28 V."
      },
      {
        "number": "7",
        "name": "IN–",
        "type": "input",
        "description": "Inverting input to the high-gain op amp, with op amp and comparator input voltage rated 0 to 28 V."
      },
      {
        "number": "8",
        "name": "TACH–/GND",
        "type": "input",
        "description": "Negative terminal of the tachometer input signal, internally connected to ground and must be tied to ground externally to provide the device reference voltage; 8-pin input voltage rated -28 V to 28 V."
      }
    ],
    "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: Pinout taken from the 8-pin PDIP and SOIC table on page 3 (P and D packages share it). The orderable; Datasheet labels pin 8 (TACH–/GND) as input and it is internally tied to ground. Per the ground conv; Datasheet labels V+ as input ('I'); mapped to power_in as a supply pin. Datasheet labels COL as inpu"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0504,
        "at": "2026-10-10T17:46:51"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm2917-n",
        "pages": 44,
        "sha256": "7eb159d92fb097b9",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "lm2917n-8.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2917n-8-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
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        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "7d9f36f33d5ed2b368457b39a9b137fbd92a2fd904e7091343f976755677cfcc",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "PDIP-8",
      "Category": "Data Acquisition",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm2917n-8"
  ],
  "discovery_pitch": "LM2917N-8 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "lm2917n-8.kicad_sym",
    "lm2917n-8.kicad_mod",
    "lm2917n-8.glb",
    "lm2917n-8.step",
    "lm2917n-8.lbr",
    "docs/hero.png",
    "docs/lm2917n-8-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm2917n-8-hero.glb",
    "lm2917n-8-hero.overlay.json"
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  "visibility": {
    "public": true
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}