SN74HCT245PWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74hct245pwr",
  "title": "SN74HCT245PWR",
  "brief": "Texas Instruments Buffer/Driver/Transceiver, TSSOP-20. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "sn74hct245pwr"
  ],
  "component": {
    "mpn": "SN74HCT245PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffer/Driver/Transceiver",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hct245.pdf",
    "parts": {
      "symbol": "sn74hct245pwr.kicad_sym",
      "footprint": "sn74hct245pwr.kicad_mod",
      "model_3d": "sn74hct245pwr-etched.glb",
      "model_3d_plain": "sn74hct245pwr.glb",
      "model_3d_step": "sn74hct245pwr-etched.step",
      "model_3d_step_plain": "sn74hct245pwr.step",
      "lbr": "sn74hct245pwr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "DIR",
        "type": "input",
        "description": "Direction select input. High = A to B, Low = B to A. TTL-compatible input (VIH ≥ 2 V, VIL ≤ 0.8 V)."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "Channel 1 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. ±6 mA drive at 5 V."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "Channel 2 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "bidirectional",
        "description": "Channel 3 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "bidirectional",
        "description": "Channel 4 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "bidirectional",
        "description": "Channel 5 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "bidirectional",
        "description": "Channel 6 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "bidirectional",
        "description": "Channel 7 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "bidirectional",
        "description": "Channel 8 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V). Center-pin placement helps minimize high-speed switching noise."
      },
      {
        "number": "11",
        "name": "B8",
        "type": "bidirectional",
        "description": "Channel 8 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "12",
        "name": "B7",
        "type": "bidirectional",
        "description": "Channel 7 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "13",
        "name": "B6",
        "type": "bidirectional",
        "description": "Channel 6 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "14",
        "name": "B5",
        "type": "bidirectional",
        "description": "Channel 5 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "15",
        "name": "B4",
        "type": "bidirectional",
        "description": "Channel 4 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "16",
        "name": "B3",
        "type": "bidirectional",
        "description": "Channel 3 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "17",
        "name": "B2",
        "type": "bidirectional",
        "description": "Channel 2 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "18",
        "name": "B1",
        "type": "bidirectional",
        "description": "Channel 1 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high."
      },
      {
        "number": "19",
        "name": "OE",
        "type": "input",
        "description": "Output enable, active low. High = all ports in high-impedance (isolation) mode; Low = all ports active. TTL-compatible input."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage. Recommended 4.5 V to 5.5 V (nominal 5 V). Absolute max 7 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74hct245.pdf",
        "pages": 38,
        "sha256": "17db29398bd94ccf",
        "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"
    },
    "logic": {
      "family_id": "74HCT245",
      "logic_family": "74HCT",
      "function_code": "245",
      "function_class": "Transceiver",
      "function_name": "Octal Bus Transceiver, 3-State",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
    "models_3d": [
      {
        "file": "sn74hct245pwr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "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": "sn74hct245pwr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0e9a0d3eb57525d7e1dbb091b011707d6c64aaccc69dca827021c0daf137c751",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-20",
      "Category": "Logic",
      "Pins": "20"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sn74hct245pwr"
  ],
  "discovery_pitch": "SN74HCT245PWR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hct245pwr.kicad_sym",
    "sn74hct245pwr.kicad_mod",
    "sn74hct245pwr.glb",
    "sn74hct245pwr.step",
    "sn74hct245pwr-etched.step",
    "sn74hct245pwr.lbr",
    "docs/hero.png",
    "docs/sn74hct245pwr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SN74HCT245PWR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRDW",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRDWR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRN",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRNE",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRNS",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRNSR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRDB",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRDBR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRDGS",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRDGSR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRJ",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRW",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HCT245PWRFK",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T07:14:24.120Z"
}