TJA1042

{
  "schema_version": 1,
  "type": "component",
  "slug": "tja1042",
  "title": "TJA1042",
  "brief": "NXP high-speed CAN transceiver, SOIC-8. ISO 11898-2, up to 5 Mbps CAN FD, standby mode, VIO variant. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "can-transceiver",
    "can-fd",
    "automotive",
    "soic-8",
    "nxp"
  ],
  "component": {
    "mpn": "TJA1042",
    "manufacturer": "NXP",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "CAN transceiver",
    "datasheet": "https://www.nxp.com/docs/en/data-sheet/TJA1042.pdf",
    "parts": {
      "symbol": "tja1042.kicad_sym",
      "footprint": "tja1042.kicad_mod",
      "model_3d": "tja1042-etched.glb",
      "model_3d_plain": "tja1042.glb",
      "model_3d_step": "tja1042-etched.step",
      "model_3d_step_plain": "tja1042.step",
      "lbr": "tja1042.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "TXD",
        "type": "input",
        "description": "Transmit data input from the host controller. Internal pull-up to VIO (or VCC on non-VIO variants) drives the bus recessive when left floating. A TXD dominant time-out (t_to(dom)TXD) releases the bus if TXD is held LOW too long, which also sets the minimum bit rate of 40 kbit/s."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground supply. On the HVSON8 package this pin is internally connected to the exposed center pad; the GND pin must be soldered to board ground and the pad is recommended for thermal/electrical performance."
      },
      {
        "number": "3",
        "name": "VCC",
        "type": "power_in",
        "description": "Main transceiver supply voltage. Operating range 4.5 V to 5.5 V (absolute max -0.3 V to +7 V). Undervoltage detection (V_uvd(VCC) = 3.5-4.5 V) forces the device into Standby."
      },
      {
        "number": "4",
        "name": "RXD",
        "type": "output",
        "description": "Receive data output; reads the digitized differential state of the CAN bus (LOW = dominant, HIGH = recessive). Also signals wake-up requests in Standby mode by going LOW after a valid filtered bus wake-up pattern."
      },
      {
        "number": "5",
        "name": "SPLIT/VIO",
        "type": "bidirectional",
        "description": "Dual-function pin whose role depends on the ordering variant. On TJA1042T and TJA1042CT this is the SPLIT common-mode stabilization output that delivers 0.5*VCC in Normal mode (floating in Standby / VCC off) for splitting bus termination. On TJA1042T(K)/3 and TJA1042BT(K) this is the VIO supply input (2.8 V to 5.5 V) that sets the I/O level of TXD, RXD and STB and powers the low-power differential receiver for standalone bus wake-up."
      },
      {
        "number": "6",
        "name": "CANL",
        "type": "bidirectional",
        "description": "LOW-level CAN bus line. Driven LOW (toward GND) in the dominant state and biased to ~0.5*VCC in recessive. High-voltage robust (-58 V to +58 V DC) and ±8 kV IEC 61000-4-2 ESD on the bus pin."
      },
      {
        "number": "7",
        "name": "CANH",
        "type": "bidirectional",
        "description": "HIGH-level CAN bus line. Driven HIGH (toward VCC) in the dominant state and biased to ~0.5*VCC in recessive. High-voltage robust (-58 V to +58 V DC) and ±8 kV IEC 61000-4-2 ESD on the bus pin."
      },
      {
        "number": "8",
        "name": "STB",
        "type": "input",
        "description": "Standby mode control input. LOW selects Normal mode (transmit/receive enabled); HIGH selects low-current Standby mode with bus wake-up via the low-power differential receiver. Internal pull-up to VIO (or VCC on non-VIO variants) defaults the device to Standby if left floating."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.nxp.com/docs/en/data-sheet/TJA1042.pdf",
        "pages": 27,
        "sha256": "aac9491f00e59436",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tja1042.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tja1042-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d4e63a69c9c0f28750b6f0151985cc57e3a4c1dec144d430b4868f03af8af45e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "High-speed CAN / CAN FD transceiver",
      "Standard": "ISO 11898-2:2016",
      "Data rate": "Up to 5 Mbps (CAN FD)",
      "Supply": "5 V (VIO option for 3.3/5 V logic)",
      "Modes": "Normal / standby (STB)",
      "Bus ESD": "+/-8 kV (HBM)",
      "Package": "SOIC-8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tja1042",
    "can fd transceiver",
    "high speed can",
    "automotive can transceiver"
  ],
  "discovery_pitch": "NXP TJA1042 high-speed CAN transceiver (SOIC-8) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tja1042.kicad_sym",
    "tja1042.kicad_mod",
    "tja1042.glb",
    "tja1042.step",
    "tja1042.lbr",
    "docs/hero.png",
    "docs/tja1042-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tja1042-etched.step"
  ],
  "variants": [
    {
      "mpn": "TJA1042T (SOIC-8, no VIO)",
      "kind": "packaging"
    },
    {
      "mpn": "TJA1042T/3 (SOIC-8, with VIO)",
      "kind": "packaging"
    },
    {
      "mpn": "TJA1042TK/3 (SOIC-8, HVSON)",
      "kind": "packaging"
    }
  ]
}