TCA9406

{
  "schema_version": 1,
  "type": "component",
  "slug": "tca9406",
  "title": "TCA9406",
  "brief": "TI dual bidirectional I2C level translator, VSSOP-8. 1.1-3.6 V to 1.65-5.5 V, output enable. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "level-translator",
    "level-shifter",
    "i2c",
    "vssop-8",
    "texas-instruments"
  ],
  "component": {
    "mpn": "TCA9406",
    "manufacturer": "Texas Instruments",
    "package": "VSSOP-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "Level translator",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tca9406.pdf",
    "parts": {
      "symbol": "tca9406.kicad_sym",
      "footprint": "tca9406.kicad_mod",
      "model_3d": "tca9406-etched.glb",
      "model_3d_plain": "tca9406.glb",
      "model_3d_step": "tca9406-etched.step",
      "model_3d_step_plain": "tca9406.step",
      "lbr": "tca9406.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "SDA_B",
        "type": "bidirectional",
        "description": "I²C/SMBus data line on the B-port side. Referenced to VCCB (2.3 V to 5.5 V). Open-drain with an internal 10-kΩ pullup to VCCB."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference (0 V)."
      },
      {
        "number": "3",
        "name": "VCCA",
        "type": "power_in",
        "description": "A-port supply voltage. Operating range 1.65 V ≤ VCCA ≤ 3.6 V and VCCA ≤ VCCB. Sets the logic reference level for the A-side I/Os and OE."
      },
      {
        "number": "4",
        "name": "SDA_A",
        "type": "bidirectional",
        "description": "I²C/SMBus data line on the A-port side. Referenced to VCCA (1.65 V to 3.6 V). Open-drain with an internal 10-kΩ pullup to VCCA."
      },
      {
        "number": "5",
        "name": "SCL_A",
        "type": "bidirectional",
        "description": "I²C/SMBus clock line on the A-port side. Referenced to VCCA (1.65 V to 3.6 V). Open-drain with an internal 10-kΩ pullup to VCCA."
      },
      {
        "number": "6",
        "name": "OE",
        "type": "input",
        "description": "Output enable, active High. Pull OE low to place all SDA/SCL outputs in the high-impedance (3-state) mode. Referenced to VCCA; VCCA-tolerant and also 5.5-V tolerant. May be tied directly to VCCA."
      },
      {
        "number": "7",
        "name": "VCCB",
        "type": "power_in",
        "description": "B-port supply voltage. Operating range 2.3 V ≤ VCCB ≤ 5.5 V. Sets the logic reference level for the B-side I/Os. Either VCCA or VCCB may be ramped first (no supply sequencing required)."
      },
      {
        "number": "8",
        "name": "SCL_B",
        "type": "bidirectional",
        "description": "I²C/SMBus clock line on the B-port side. Referenced to VCCB (2.3 V to 5.5 V). Open-drain with an internal 10-kΩ pullup to VCCB."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tca9406.pdf",
        "pages": 38,
        "sha256": "fdb80d682fbacd5e",
        "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": "tca9406.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.1,
          2.0,
          0.85
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "353552981eef35cb93635057d4aeb89aef22648c77af6fd095e328bfe6b834bd",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tca9406-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.1,
          2.0,
          0.85
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b00cd03b4905121c25598f84d009bde3715dc1d3ee0d3a10423b7dc4032181ed",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Dual bidirectional I2C/SMBus level translator",
      "A side": "1.1-3.6 V",
      "B side": "1.65-5.5 V",
      "Channels": "2 (SDA, SCL)",
      "Direction control": "None (auto, open-drain)",
      "Enable": "OE isolates buses",
      "Package": "VSSOP-8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tca9406",
    "i2c level shifter",
    "bidirectional level translator",
    "voltage translator i2c"
  ],
  "discovery_pitch": "TI TCA9406 dual bidirectional I2C level translator (VSSOP-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",
    "tca9406.kicad_sym",
    "tca9406.kicad_mod",
    "tca9406.glb",
    "tca9406.step",
    "tca9406.lbr",
    "docs/hero.png",
    "docs/tca9406-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tca9406-etched.step"
  ],
  "variants": [
    {
      "mpn": "TCA9406DCUR (VSSOP-8)",
      "kind": "packaging"
    },
    {
      "mpn": "TCA9406YZPR (DSBGA-8)",
      "kind": "packaging"
    }
  ]
}