CTM8251KAT

{
  "schema_version": 1,
  "type": "component",
  "slug": "ctm8251kat",
  "title": "CTM8251KAT",
  "brief": "VISOM CAN Bus Modules, DIP-7. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "iot-communication modules",
    "ctm8251kat"
  ],
  "component": {
    "mpn": "CTM8251KAT",
    "manufacturer": "VISOM",
    "package": "DIP-7",
    "pin_count": 7,
    "category": "IoT/Communication Modules",
    "subcategory": "CAN Bus Modules",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895596661260288",
    "parts": {
      "symbol": "ctm8251kat.kicad_sym",
      "footprint": "ctm8251kat.kicad_mod",
      "model_3d": "ctm8251kat-etched.glb",
      "model_3d_plain": "ctm8251kat.glb",
      "model_3d_step": "ctm8251kat-etched.step",
      "model_3d_step_plain": "ctm8251kat.step",
      "lbr": "ctm8251kat.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply input. 3.3VDC nominal (3.15-3.45V range) for the CTM8251KAT variant. Typical quiescent current 46 mA; maximum operating current 130 mA. Absolute maximum -0.7V to +5V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Logic-side ground (power input return). Reference for VCC, TXD, and RXD. Galvanically isolated from the CAN-bus-side ground (CANG)."
      },
      {
        "number": "3",
        "name": "TXD",
        "type": "input",
        "description": "CAN controller transmit-data input from the host MCU/CAN controller. 3.3V-compatible logic (VIH >= 0.7·VCC, VIL <= 0.3·VCC). Drive current 2 mA typical. Dominant-timeout Tto(dom) = 0.3-12 ms (1 ms typ)."
      },
      {
        "number": "4",
        "name": "RXD",
        "type": "output",
        "description": "CAN controller receive-data output to the host MCU/CAN controller. 3.3V push-pull logic level (VOH >= VCC-0.4, VOL <= 0.4V at IRXD=4 mA). Output current up to 10 mA."
      },
      {
        "number": "6",
        "name": "CANH",
        "type": "bidirectional",
        "description": "CAN bus high line, ISO 11898-2 differential output/input. Dominant level 2.75-4.5V (3.5V typ); recessive level 2-3V (2.5V typ). Bus pin withstand voltage ±36V DC, transient ±100V."
      },
      {
        "number": "7",
        "name": "CANL",
        "type": "bidirectional",
        "description": "CAN bus low line, ISO 11898-2 differential output/input. Dominant level 0.5-2.25V (1.5V typ); recessive level 2-3V (2.5V typ). Bus pin withstand voltage ±36V DC, transient ±100V."
      },
      {
        "number": "8",
        "name": "CANG",
        "type": "power_out",
        "description": "Isolated (bus-side) power supply ground reference for the CAN-bus side of the module. Optional connection point for cable shield (single-point earth) in shielded twisted-pair installations. May be left floating if unused."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895596661260288",
        "pages": 5,
        "sha256": "9a3b28d0dd28f73c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 7,
        "described": 7,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ctm8251kat.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,
          10.16,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.127,
        "footprint_binding": "identity",
        "sha256": "f90bd1fa5f010bc999f2dd88ca613ee145644353e91e90fc2564259080330cbf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ctm8251kat-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,
          10.16,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.127,
        "footprint_binding": "identity",
        "sha256": "a8dd9cf6ec023799b606df72647d82fc23e33fe91c3e1037ae2646d83902271a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "VISOM",
      "Package": "DIP-7",
      "Category": "IoT/Communication Modules",
      "Pins": "7"
    }
  },
  "variants": [
    {
      "mpn": "CTM8251KAT",
      "kind": "packaging"
    },
    {
      "mpn": "CTM8251KT",
      "kind": "unknown"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ctm8251kat"
  ],
  "discovery_pitch": "CTM8251KAT (VISOM) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ctm8251kat.kicad_sym",
    "ctm8251kat.kicad_mod",
    "ctm8251kat.glb",
    "ctm8251kat.step",
    "ctm8251kat.lbr",
    "docs/hero.png",
    "docs/ctm8251kat-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T19:35:18.425Z"
}