LM2903 Dual Comparator

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2903",
  "title": "LM2903 Dual Comparator",
  "brief": "Dual differential comparator with open-collector outputs, single or split supply.",
  "version": "0.1.4",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "comparator",
    "dual",
    "open-collector",
    "single-supply",
    "ti",
    "soic-8"
  ],
  "component": {
    "mpn": "LM2903",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Analog",
    "subcategory": "Comparator",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm2903.pdf",
    "parts": {
      "symbol": "lm2903.kicad_sym",
      "footprint": "lm2903.kicad_mod",
      "model_3d": "lm2903-etched.glb",
      "model_3d_plain": "lm2903.glb",
      "lbr": "lm2903.lbr",
      "model_3d_step": "lm2903-etched.step",
      "model_3d_step_plain": "lm2903.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "1OUT",
        "type": "output",
        "description": "Output pin of comparator 1. Open-collector output; requires an external pull-up resistor to VCC. Compatible with TTL, MOS, and CMOS logic. Low-level output voltage typically 110 mV (400 mV max) at ISINK ≤ 4 mA."
      },
      {
        "number": "2",
        "name": "1IN-",
        "type": "input",
        "description": "Inverting (negative) input of comparator 1. Common-mode input range extends from V- (ground) up to (V+) - 2.0V. Input bias current typically -3.5 nA (-25 nA max)."
      },
      {
        "number": "3",
        "name": "1IN+",
        "type": "input",
        "description": "Non-inverting (positive) input of comparator 1. Common-mode input range extends from V- (ground) up to (V+) - 2.0V. Input bias current typically -3.5 nA (-25 nA max)."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (V-). Negative supply / reference for both comparators. Connect to system ground for single-supply operation."
      },
      {
        "number": "5",
        "name": "2IN+",
        "type": "input",
        "description": "Non-inverting (positive) input of comparator 2. Common-mode input range extends from V- (ground) up to (V+) - 2.0V. Input bias current typically -3.5 nA (-25 nA max)."
      },
      {
        "number": "6",
        "name": "2IN-",
        "type": "input",
        "description": "Inverting (negative) input of comparator 2. Common-mode input range extends from V- (ground) up to (V+) - 2.0V. Input bias current typically -3.5 nA (-25 nA max)."
      },
      {
        "number": "7",
        "name": "2OUT",
        "type": "output",
        "description": "Output pin of comparator 2. Open-collector output; requires an external pull-up resistor to VCC. Compatible with TTL, MOS, and CMOS logic. Low-level output voltage typically 110 mV (400 mV max) at ISINK ≤ 4 mA."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply (V+). Operating range 2V to 30V (LM2903), absolute maximum 36V. Quiescent current typically 400 µA (600 µA max) at VS = 5V, no load."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm2903.pdf",
        "pages": 56,
        "sha256": "24c6b3c03dd65dfd",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      },
      "review_fix": {
        "at": "2026-11-10",
        "by": "part-reviewer (Ray review)",
        "what": "pin names set to the maker spelling from TI SLCS005AH Table 4-1 Pin Functions (SOIC): 0 on the page, 8 on the symbol (numbers unchanged)."
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm2903.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": "2026-11-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2903-etched.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.778
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e611986b4f31fe9c45054bedb4b50faa6bbae1433938fa9008fb11744ab6baef",
        "checked": "2026-11-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Dual differential comparator",
      "Output": "Open-collector",
      "Supply voltage": "2 V to 36 V single, or +-1 V to +-18 V",
      "Input offset voltage": "2 mV typ",
      "Response time": "1.5 us typ",
      "Operating temperature": "-40 C to 125 C"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "dual comparator",
    "voltage comparator",
    "threshold detector",
    "open-collector comparator"
  ],
  "discovery_pitch": "Two open-collector comparators for threshold detection and level sensing on a single supply, the automotive-grade LM393.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm2903.kicad_sym",
    "lm2903.kicad_mod",
    "lm2903.glb",
    "docs/hero.png",
    "docs/lm2903-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm2903-etched.glb",
    "lm2903.lbr",
    "lm2903-etched.step",
    "lm2903.step"
  ],
  "variants": [
    {
      "mpn": "LM2903D",
      "kind": "unknown"
    },
    {
      "mpn": "LM2903DGK",
      "kind": "unknown"
    },
    {
      "mpn": "LM2903P",
      "kind": "unknown"
    },
    {
      "mpn": "LM2903PS",
      "kind": "unknown"
    },
    {
      "mpn": "LM2903PW",
      "kind": "unknown"
    }
  ],
  "description": "Dual differential comparator with open-collector outputs, single or split supply.",
  "org": "adom"
}