LMH1251MT

{
  "slug": "lmh1251mt",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Analog Switches, Multiplexers, TSSOP-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "lmh1251mt",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lmh1251mt.kicad_sym",
    "lmh1251mt.kicad_mod",
    "lmh1251mt.glb",
    "lmh1251mt.step",
    "lmh1251mt.lbr",
    "docs/hero.png",
    "docs/lmh1251mt-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lmh1251mt-hero.glb",
    "lmh1251mt-hero.overlay.json"
  ],
  "component": {
    "mpn": "LMH1251MT",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-24",
    "pin_count": 24,
    "category": "Interface",
    "subcategory": "Analog Switches, Multiplexers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lmh1251",
    "parts": {
      "symbol": "lmh1251mt.kicad_sym",
      "footprint": "lmh1251mt.kicad_mod",
      "model_3d": "lmh1251mt-hero.glb",
      "model_3d_plain": "lmh1251mt.glb",
      "model_3d_step": "lmh1251mt-etched.step",
      "model_3d_step_plain": "lmh1251mt.step",
      "lbr": "lmh1251mt.lbr"
    },
    "distributor_links": {
      "lcsc": "C1557068",
      "digikey": "LMH1251MT-ND",
      "mouser": "926-LMH1251MT"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T21:27:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LMH1251MT-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "926-LMH1251MT",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "H SYNCIN",
        "type": "input",
        "description": "Horizontal sync input for the RGBHV channel; logic low is -0.5 V to 1.5 V and logic high is 3.0 V to VCC+0.5 V."
      },
      {
        "number": "2",
        "name": "V SYNCIN",
        "type": "power_in",
        "description": "Vertical sync input for the RGBHV channel; logic low is -0.5 V to 1.5 V and logic high is 3.0 V to VCC+0.5 V."
      },
      {
        "number": "3",
        "name": "RIN",
        "type": "input",
        "description": "Red video input of the RGBHV channel, 0.0 V to 0.7 V pk-pk operating range and must be properly terminated."
      },
      {
        "number": "4",
        "name": "GIN",
        "type": "input",
        "description": "Green video input of the RGBHV channel, 0.0 V to 0.7 V pk-pk operating range and must be properly terminated."
      },
      {
        "number": "5",
        "name": "BIN",
        "type": "input",
        "description": "Blue video input of the RGBHV channel, 0.0 V to 0.7 V pk-pk operating range and must be properly terminated."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply pin, operating range 4.75 V to 5.25 V (absolute maximum 5.5 V)."
      },
      {
        "number": "8",
        "name": "PR IN",
        "type": "input",
        "description": "PR component video input of the YPBPR channel, -0.35 V to 0.35 V operating range."
      },
      {
        "number": "9",
        "name": "PB IN",
        "type": "input",
        "description": "PB component video input of the YPBPR channel, -0.35 V to 0.35 V operating range."
      },
      {
        "number": "10",
        "name": "Y",
        "type": "input",
        "description": "Y (luma, including sync) video input of the YPBPR channel, -0.3 V to 0.7 V operating range."
      },
      {
        "number": "11",
        "name": "Yc",
        "type": "input",
        "description": "Sync-on-Y connection of the sync processor, shown as 'SYNC on Y' in the application circuits."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "13",
        "name": "V SYNCOUT",
        "type": "power_in",
        "description": "Vertical sync output, CMOS rail-to-rail, 3 mA drive; load capacitance must not exceed 6 pF."
      },
      {
        "number": "14",
        "name": "H SYNCOUT",
        "type": "output",
        "description": "Horizontal sync output, CMOS rail-to-rail, 3 mA drive; load capacitance must not exceed 6 pF."
      },
      {
        "number": "15",
        "name": "REXT",
        "type": "passive",
        "description": "External 10 kΩ 1% resistor (under 100 ppm/°C) sets the internal VREF current; keep video signals away from this high-impedance pin."
      },
      {
        "number": "16",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "17",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply pin, operating range 4.75 V to 5.25 V (absolute maximum 5.5 V)."
      },
      {
        "number": "18",
        "name": "BOUT",
        "type": "output",
        "description": "Blue video output, 700 mVPP with black level of about 2.1 V, AC-coupled to the next stage."
      },
      {
        "number": "19",
        "name": "GOUT",
        "type": "output",
        "description": "Green video output, 700 mVPP with black level of about 2.1 V, AC-coupled to the next stage."
      },
      {
        "number": "20",
        "name": "ROUT",
        "type": "output",
        "description": "Red video output, 700 mVPP with black level of about 2.1 V, AC-coupled to the next stage."
      },
      {
        "number": "21",
        "name": "POWER SAVE",
        "type": "input",
        "description": "Logic input: high enables low power mode, low disables it; logic low is -0.5 V to 1.5 V and logic high is 3.0 V to VCC+0.5 V."
      },
      {
        "number": "22",
        "name": "SD/HD SELECT",
        "type": "bidirectional",
        "description": "Input selecting SD (low) or HD (high) in manual mode; in auto mode it outputs low for SD and high for HD detected, so apply no voltage in auto mode."
      },
      {
        "number": "23",
        "name": "AUTO/MANUAL DETECT SELECT",
        "type": "input",
        "description": "High selects automatic SD/HD format detection (recommended), low selects manual mode with format set by pin 22."
      },
      {
        "number": "24",
        "name": "INPUT SELECT",
        "type": "input",
        "description": "Low selects the RGBHV input channel, high selects the YPBPR input channel."
      }
    ],
    "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 connection diagram text extraction is ambiguous: a separate 'GND' label appears between H SYNCOU; The datasheet labels this pin 'SYNC on Y' in the figure and 'Yc' in the connection diagram text, and; The datasheet names pin 23 'AUTO/MANUAL DETECT SELECT' and pin 22 'SD/HD SELECT' with pin 22 being b"
        ],
        "pages_sent": 19,
        "cost_usd": 0.1231,
        "at": "2026-10-07T21:26:47"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lmh1251",
        "pages": 19,
        "sha256": "10e4dbc271aebd97",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 24,
        "described": 24,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
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        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "706322f42d9793ebf28d5b80100a68bfa8769998a00b78acadf7af937fc1454f",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lmh1251mt-etched.step",
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        "origin": "footprint origin = pad-pattern centre",
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        "sha256": "f5923403e3ae642146cc584aa988255207211ba3a4219ccc593c08f6f3248d0e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  }
}