SN74LVC245A

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74lvc245",
  "title": "SN74LVC245A",
  "brief": "TI octal bus transceiver with 3-state outputs, TSSOP-20. 1.65-3.6 V, 5 V-tolerant inputs, direction control. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "bus-transceiver",
    "level-translator",
    "octal",
    "tssop-20",
    "texas-instruments"
  ],
  "component": {
    "mpn": "SN74LVC245",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Bus transceiver / level translator",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74lvc245a.pdf",
    "parts": {
      "symbol": "sn74lvc245.kicad_sym",
      "footprint": "sn74lvc245.kicad_mod",
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      "model_3d_plain": "sn74lvc245.glb",
      "model_3d_step": "sn74lvc245-etched.step",
      "model_3d_step_plain": "sn74lvc245.step",
      "lbr": "sn74lvc245.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "DIR",
        "type": "input",
        "description": "Direction control. When high, signal propagates from A to B; when low, signal propagates from B to A. CMOS input with VIH ≈ 0.65·VCC / VIL ≈ 0.35·VCC."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port A channel 1. Driven when DIR=L and /OE=L; receives when DIR=H. Hi-Z when /OE=H. IOL/IOH up to 24 mA at VCC=3 V."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port A channel 2. Driven when DIR=L and /OE=L; receives when DIR=H."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port A channel 3. Driven when DIR=L and /OE=L; receives when DIR=H."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port A channel 4. Driven when DIR=L and /OE=L; receives when DIR=H."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port A channel 5. Driven when DIR=L and /OE=L; receives when DIR=H."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port A channel 6. Driven when DIR=L and /OE=L; receives when DIR=H."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port A channel 7. Driven when DIR=L and /OE=L; receives when DIR=H."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port A channel 8. Driven when DIR=L and /OE=L; receives when DIR=H."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for all internal logic and I/O."
      },
      {
        "number": "11",
        "name": "B8",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port B channel 8. Driven when DIR=H and /OE=L; receives when DIR=L."
      },
      {
        "number": "12",
        "name": "B7",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port B channel 7. Driven when DIR=H and /OE=L; receives when DIR=L."
      },
      {
        "number": "13",
        "name": "B6",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port B channel 6. Driven when DIR=H and /OE=L; receives when DIR=L."
      },
      {
        "number": "14",
        "name": "B5",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port B channel 5. Driven when DIR=H and /OE=L; receives when DIR=L."
      },
      {
        "number": "15",
        "name": "B4",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port B channel 4. Driven when DIR=H and /OE=L; receives when DIR=L."
      },
      {
        "number": "16",
        "name": "B3",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port B channel 3. Driven when DIR=H and /OE=L; receives when DIR=L."
      },
      {
        "number": "17",
        "name": "B2",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port B channel 2. Driven when DIR=H and /OE=L; receives when DIR=L."
      },
      {
        "number": "18",
        "name": "B1",
        "type": "bidirectional",
        "description": "Transceiver I/O pin, port B channel 1. Driven when DIR=H and /OE=L; receives when DIR=L."
      },
      {
        "number": "19",
        "name": "~{OE}",
        "type": "input",
        "description": "Active-low output enable. When low, the selected direction drivers are active; when high, both A and B port outputs are placed in high-impedance (Hi-Z)."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply. Recommended operating range 1.65 V to 3.6 V. Inputs are 5.5 V-tolerant regardless of VCC. Decouple with 0.1 µF close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74lvc245a.pdf",
        "pages": 35,
        "sha256": "f8c28b30ab2bf1a0",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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    "logic": {
      "family_id": "74LVC245",
      "logic_family": "74LVC",
      "function_code": "245",
      "function_class": "Transceiver",
      "function_name": "Octal Bus Transceiver, 3-State",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74lvc245-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          1.2
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "357928109cd49b040e64609e7e593721821a051e532d88e6131e4d07c54dd3bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Octal bus transceiver (3-state)",
      "Bits": "8, bidirectional",
      "Direction": "DIR pin",
      "Output enable": "OE (active low)",
      "Supply": "1.65-3.6 V",
      "Input tolerance": "5 V-tolerant",
      "Package": "TSSOP-20"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sn74lvc245",
    "octal bus transceiver",
    "3.3v level shifter",
    "5v tolerant buffer"
  ],
  "discovery_pitch": "TI SN74LVC245A octal bus transceiver / level translator (TSSOP-20) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SN74LVC245APWR (TSSOP-20)",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC245ADWR (SOIC-20)",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC245ARGYR (VQFN-20)",
      "kind": "packaging"
    }
  ]
}