CTM8251KAD

{
  "slug": "ctm8251kad",
  "version": "0.1.0",
  "type": "component",
  "description": "VISOM CAN Bus Modules, DIP-12. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "iot-communication modules",
    "ctm8251kad",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ctm8251kad.kicad_sym",
    "ctm8251kad.kicad_mod",
    "ctm8251kad.glb",
    "ctm8251kad.step",
    "ctm8251kad.lbr",
    "docs/hero.png",
    "docs/ctm8251kad-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ctm8251kad-hero.glb",
    "ctm8251kad-hero.overlay.json",
    "ctm8251kad-etched.glb"
  ],
  "component": {
    "mpn": "CTM8251KAD",
    "manufacturer": "VISOM",
    "package": "DIP-12",
    "pin_count": 12,
    "category": "IoT/Communication Modules",
    "subcategory": "CAN Bus Modules",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/64ed8d79aaeb293784b1c3f529c48620.pdf",
    "parts": {
      "symbol": "ctm8251kad.kicad_sym",
      "footprint": "ctm8251kad.kicad_mod",
      "model_3d": "ctm8251kad-hero.glb",
      "model_3d_plain": "ctm8251kad-etched.glb",
      "model_3d_step": "ctm8251kad-etched.step",
      "model_3d_step_plain": "ctm8251kad.step",
      "lbr": "ctm8251kad.lbr"
    },
    "distributor_links": {
      "lcsc": "C882117"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:41:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply input, 3.15~3.45 VDC (3.3 V nominal) for CTM8251KAD; no reverse-polarity protection."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Power supply input ground."
      },
      {
        "number": "3",
        "name": "RXD1",
        "type": "output",
        "description": "Receive data output of CAN channel 1, 3.3 V UART level for the KAD, VOL max 0.4 V and VOH min VCC-0.4 V at 4 mA."
      },
      {
        "number": "4",
        "name": "TXD1",
        "type": "input",
        "description": "Transmit data input of CAN channel 1, 3.3 V UART level with VIH min 0.7VCC and VIL max 0.3VCC."
      },
      {
        "number": "5",
        "name": "RXD2",
        "type": "output",
        "description": "Receive data output of CAN channel 2, 3.3 V UART level for the KAD, VOL max 0.4 V and VOH min VCC-0.4 V at 4 mA."
      },
      {
        "number": "6",
        "name": "TXD2",
        "type": "input",
        "description": "Transmit data input of CAN channel 2, 3.3 V UART level with VIH min 0.7VCC and VIL max 0.3VCC."
      },
      {
        "number": "7",
        "name": "CANH2",
        "type": "bidirectional",
        "description": "CAN bus high line of channel 2, bus pin withstand -27 V to +40 V."
      },
      {
        "number": "8",
        "name": "CANL2",
        "type": "bidirectional",
        "description": "CAN bus low line of channel 2, bus pin withstand -27 V to +40 V."
      },
      {
        "number": "9",
        "name": "CANG2",
        "type": "passive",
        "description": "Isolated power output ground for CAN channel 2; leave floating if unused."
      },
      {
        "number": "10",
        "name": "CANH1",
        "type": "bidirectional",
        "description": "CAN bus high line of channel 1, bus pin withstand -27 V to +40 V."
      },
      {
        "number": "11",
        "name": "CANL1",
        "type": "bidirectional",
        "description": "CAN bus low line of channel 1, bus pin withstand -27 V to +40 V."
      },
      {
        "number": "12",
        "name": "CANG1",
        "type": "passive",
        "description": "Isolated power output ground for CAN channel 1; leave floating if unused."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet text does not explicitly say 'DIP-12'; it shows a 12-pin through-hole module (19.50*16.50*; Pin numbering in the pin table is per Chinese table; the package drawing was not available in text, "
        ],
        "pages_sent": 5,
        "cost_usd": 0.061,
        "at": "2026-10-22T21:41:19"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/64ed8d79aaeb293784b1c3f529c48620.pdf",
        "pages": 5,
        "sha256": "250dbd57c05032bb",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 12,
        "described": 12,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ctm8251kad.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.62,
          15.24,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.127,
        "footprint_binding": "identity",
        "sha256": "d0d14c257dc175efde81c54c2e63e5477a3af152f96520f6884aa7b452ad9e53",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ctm8251kad-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": [
          7.62,
          15.24,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.127,
        "footprint_binding": "identity",
        "sha256": "b27ef91c061241c3c54d2f35070553efc883b948db5d8c321f69c476eaf34857",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}