SN74LVC244APWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74lvc244apwr",
  "title": "SN74LVC244APWR",
  "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",
    "sn74lvc244apwr"
  ],
  "component": {
    "mpn": "SN74LVC244APWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffer/Driver/Transceiver",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74lvc244a.pdf",
    "parts": {
      "symbol": "sn74lvc244apwr.kicad_sym",
      "footprint": "sn74lvc244apwr.kicad_mod",
      "model_3d": "sn74lvc244apwr-etched.glb",
      "model_3d_plain": "sn74lvc244apwr.glb",
      "model_3d_step": "sn74lvc244apwr-etched.step",
      "model_3d_step_plain": "sn74lvc244apwr.step",
      "lbr": "sn74lvc244apwr.lbr"
    },
    "distributor_links": {
      "digikey": "296-1230-2-ND",
      "lcsc": "C7668"
    },
    "pins": [
      {
        "number": "1",
        "name": "1OE",
        "type": "input",
        "description": "Active-low output enable for the first 4-bit buffer (1Y1-1Y4). When low, outputs are enabled; when high, outputs are in high-impedance (Hi-Z) state."
      },
      {
        "number": "2",
        "name": "1A1",
        "type": "input",
        "description": "Port 1A1 input to the first 4-bit buffer channel 1. Accepts input voltages up to 5.5V regardless of VCC."
      },
      {
        "number": "3",
        "name": "2Y4",
        "type": "tri_state",
        "description": "Port 2Y4 buffered output from the second 4-bit buffer channel 4. 3-state; enabled by 2OE low. Drives up to ±24mA at VCC=3V."
      },
      {
        "number": "4",
        "name": "1A2",
        "type": "input",
        "description": "Port 1A2 input to the first 4-bit buffer channel 2. Accepts input voltages up to 5.5V."
      },
      {
        "number": "5",
        "name": "2Y3",
        "type": "tri_state",
        "description": "Port 2Y3 buffered output from the second 4-bit buffer channel 3. 3-state; enabled by 2OE low."
      },
      {
        "number": "6",
        "name": "1A3",
        "type": "input",
        "description": "Port 1A3 input to the first 4-bit buffer channel 3. Accepts input voltages up to 5.5V."
      },
      {
        "number": "7",
        "name": "2Y2",
        "type": "tri_state",
        "description": "Port 2Y2 buffered output from the second 4-bit buffer channel 2. 3-state; enabled by 2OE low."
      },
      {
        "number": "8",
        "name": "1A4",
        "type": "input",
        "description": "Port 1A4 input to the first 4-bit buffer channel 4. Accepts input voltages up to 5.5V."
      },
      {
        "number": "9",
        "name": "2Y1",
        "type": "tri_state",
        "description": "Port 2Y1 buffered output from the second 4-bit buffer channel 1. 3-state; enabled by 2OE low."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return for the device. Connect to the system 0V reference."
      },
      {
        "number": "11",
        "name": "2A1",
        "type": "input",
        "description": "Port 2A1 input to the second 4-bit buffer channel 1. Accepts input voltages up to 5.5V."
      },
      {
        "number": "12",
        "name": "1Y4",
        "type": "tri_state",
        "description": "Port 1Y4 buffered output from the first 4-bit buffer channel 4. 3-state; enabled by 1OE low."
      },
      {
        "number": "13",
        "name": "2A2",
        "type": "input",
        "description": "Port 2A2 input to the second 4-bit buffer channel 2. Accepts input voltages up to 5.5V."
      },
      {
        "number": "14",
        "name": "1Y3",
        "type": "tri_state",
        "description": "Port 1Y3 buffered output from the first 4-bit buffer channel 3. 3-state; enabled by 1OE low."
      },
      {
        "number": "15",
        "name": "2A3",
        "type": "input",
        "description": "Port 2A3 input to the second 4-bit buffer channel 3. Accepts input voltages up to 5.5V."
      },
      {
        "number": "16",
        "name": "1Y2",
        "type": "tri_state",
        "description": "Port 1Y2 buffered output from the first 4-bit buffer channel 2. 3-state; enabled by 1OE low."
      },
      {
        "number": "17",
        "name": "2A4",
        "type": "input",
        "description": "Port 2A4 input to the second 4-bit buffer channel 4. Accepts input voltages up to 5.5V."
      },
      {
        "number": "18",
        "name": "1Y1",
        "type": "tri_state",
        "description": "Port 1Y1 buffered output from the first 4-bit buffer channel 1. 3-state; enabled by 1OE low."
      },
      {
        "number": "19",
        "name": "2OE",
        "type": "input",
        "description": "Active-low output enable for the second 4-bit buffer (2Y1-2Y4). When low, outputs are enabled; when high, outputs are in high-impedance (Hi-Z) state."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage input. Operating range 1.65V to 3.6V (data retention down to 1.5V). Bypass with a 100nF ceramic capacitor close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74lvc244a.pdf",
        "pages": 50,
        "sha256": "5196fbace1069cc2",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.8625,
        -2.925
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TSSOP-20_4.4x6.5mm_P0.65mm@sha256:b7ca3a31dd45c122",
      "mark": "drawn"
    },
    "logic": {
      "family_id": "74LVC244",
      "logic_family": "74LVC",
      "function_code": "244",
      "function_class": "Buffer",
      "function_name": "Octal Buffer/Driver, Non-Inverting, 3-State",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
    "models_3d": [
      {
        "file": "sn74lvc244apwr.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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74lvc244apwr-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "31a54374cd240676e5fae9897447f261585ab59afbb2a1b819569ca92daf7890",
        "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": [
    "sn74lvc244apwr"
  ],
  "discovery_pitch": "SN74LVC244APWR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74lvc244apwr.kicad_sym",
    "sn74lvc244apwr.kicad_mod",
    "sn74lvc244apwr.glb",
    "sn74lvc244apwr.step",
    "sn74lvc244apwr-etched.step",
    "sn74lvc244apwr.lbr",
    "docs/hero.png",
    "docs/sn74lvc244apwr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SN74LVC244APWR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRDB",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRDBR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRDGV",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRDGVR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRDW",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRDWR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRN",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRNS",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRNSR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRDGS",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRDGSR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRRGY",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRRGYR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRRKS",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRRKSR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRRWP",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRRWPR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRZQN",
      "kind": "packaging"
    },
    {
      "mpn": "SN74LVC244APWRZQNR",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T07:41:30.969Z"
}