TJA1051 CAN Transceiver

{
  "schema_version": 1,
  "type": "component",
  "slug": "tja1051",
  "title": "TJA1051 CAN Transceiver",
  "brief": "High-speed CAN transceiver, the interface between a CAN controller and the bus, up to 5 Mbit/s.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "can",
    "transceiver",
    "interface",
    "automotive",
    "nxp",
    "soic-8"
  ],
  "component": {
    "mpn": "TJA1051",
    "manufacturer": "NXP",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "CAN Transceiver",
    "datasheet": "https://www.nxp.com/docs/en/data-sheet/TJA1051.pdf",
    "parts": {
      "symbol": "tja1051.kicad_sym",
      "footprint": "tja1051.kicad_mod",
      "model_3d": "tja1051-etched.glb",
      "model_3d_plain": "tja1051.glb",
      "model_3d_step": "tja1051-etched.step",
      "model_3d_step_plain": "tja1051.step",
      "lbr": "tja1051.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "TXD",
        "type": "input",
        "description": "CAN transmit data input from the controller. A LOW level drives the CAN bus to the dominant state; a HIGH level allows the bus to be recessive. Has an internal pull-up to VIO so a floating TXD defaults to recessive. A 'TXD dominant time-out' timer disables the transmitter if TXD stays LOW longer than t_to(dom)TXD, setting a minimum bus rate of ~20 kbit/s."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground, 0 V reference for all signals. On the HVSON8 (TJA1051TK/3) variant the die supply ground is bonded to both the GND pin and the exposed center pad; both must be soldered to board ground for correct and enhanced thermal operation."
      },
      {
        "number": "3",
        "name": "VCC",
        "type": "power_in",
        "description": "Main transceiver supply voltage, 4.5 V to 5.5 V (typ. 5 V). Feeds the CAN bus driver stage. Undervoltage detection at V_uvd(VCC) = 3.5 to 4.5 V disengages the transceiver from the bus (zero load) until VCC recovers."
      },
      {
        "number": "4",
        "name": "RXD",
        "type": "output",
        "description": "CAN receive data output; reproduces the logical state of the CAN bus for the controller. LOW when the bus is dominant, HIGH when recessive. Push-pull output referenced to VIO (or VCC on parts without a VIO pin); floats in Off mode on the TJA1051T/E."
      },
      {
        "number": "5",
        "name": "NC/EN/VIO",
        "type": "unconnected",
        "description": "Pin 5 function is set by the ordering variant. TJA1051T: not connected (n.c.). TJA1051T/E: EN, active-HIGH enable control input (LOW = Off mode, bus and RXD float); internal pull-down to GND. TJA1051T/3 and TJA1051TK/3: VIO, I/O level-adapter supply (2.8 V to 5.5 V) that sets the logic levels of TXD, RXD and S so the device can interface directly with 3 V-5 V microcontrollers."
      },
      {
        "number": "6",
        "name": "CANL",
        "type": "bidirectional",
        "description": "LOW-level CAN bus line. Together with CANH forms the differential ISO 11898-2 bus. Driven LOW in the dominant state and released toward Vcc/2 in the recessive state. Withstands −58 V to +58 V continuous bus voltage and ±8 kV IEC 61000-4-2 ESD."
      },
      {
        "number": "7",
        "name": "CANH",
        "type": "bidirectional",
        "description": "HIGH-level CAN bus line. Driven HIGH in the dominant state and released toward Vcc/2 in the recessive state, forming the differential pair with CANL. Withstands −58 V to +58 V continuous bus voltage and ±8 kV IEC 61000-4-2 ESD."
      },
      {
        "number": "8",
        "name": "S",
        "type": "input",
        "description": "Silent-mode control input. LOW selects Normal mode (transmitter active); HIGH selects Silent mode (transmitter disabled, bus released to recessive, receiver still active). Internal pull-down to GND so a floating S defaults to Normal mode."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.nxp.com/docs/en/data-sheet/TJA1051.pdf",
        "pages": 25,
        "sha256": "6637cd500dda3c1c",
        "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": "tja1051.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": "tja1051-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "25a5f0f2c1e7ecf6ec4264eb75c7a0e7405720472d7f7b46faff25059e9aa551",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "High-speed CAN transceiver",
      "Data rate": "Up to 5 Mbit/s (CAN FD)",
      "Supply voltage": "4.5 V to 5.5 V",
      "Bus pins": "CANH / CANL (differential)",
      "Standards": "ISO 11898-2",
      "Features": "TXD dominant timeout, thermal protection",
      "Operating temperature": "-40 C to 150 C"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "CAN transceiver",
    "CAN bus interface",
    "high-speed CAN",
    "classic CAN and CAN FD"
  ],
  "discovery_pitch": "The physical-layer link between a microcontroller's CAN controller and the CAN bus, supporting CAN FD up to 5 Mbit/s.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
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    "tja1051.step",
    "tja1051.lbr",
    "docs/hero.png",
    "docs/tja1051-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tja1051-etched.step"
  ],
  "variants": [
    {
      "mpn": "TJA1051T",
      "kind": "unknown"
    },
    {
      "mpn": "TJA1051T/E",
      "kind": "unknown"
    },
    {
      "mpn": "TJA1051T/3",
      "kind": "unknown"
    },
    {
      "mpn": "TJA1051TK/3",
      "kind": "unknown"
    }
  ]
}