SN74HC244APWR

{
  "slug": "sn74hc244apwr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Buffers / Drivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "sn74hc244apwr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hc244apwr.kicad_sym",
    "sn74hc244apwr.kicad_mod",
    "sn74hc244apwr.glb",
    "sn74hc244apwr.step",
    "sn74hc244apwr.lbr",
    "docs/hero.png",
    "docs/sn74hc244apwr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74hc244apwr-hero.glb",
    "sn74hc244apwr-hero.overlay.json",
    "sn74hc244apwr-etched.glb"
  ],
  "component": {
    "mpn": "SN74HC244APWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic ICs",
    "subcategory": "Buffers / Drivers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc244a.pdf",
    "parts": {
      "symbol": "sn74hc244apwr.kicad_sym",
      "footprint": "sn74hc244apwr.kicad_mod",
      "model_3d": "sn74hc244apwr-hero.glb",
      "model_3d_plain": "sn74hc244apwr-etched.glb",
      "model_3d_step": "sn74hc244apwr-etched.step",
      "model_3d_step_plain": "sn74hc244apwr.step",
      "lbr": "sn74hc244apwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2866107",
      "mouser": "595-SN74HC244APWR"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T23:51:20Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 988 calls left today"
      },
      "mouser": {
        "pn": "595-SN74HC244APWR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1OE",
        "type": "input",
        "description": "Active-low output enable for buffer 1; when low the 1A inputs pass non-inverted to the 1Y outputs, and when high the 1Y outputs are high-impedance."
      },
      {
        "number": "2",
        "name": "1A1",
        "type": "input",
        "description": "Data input to buffer 1 that must stay between 0 V and VCC; unused inputs must be tied to VCC or GND."
      },
      {
        "number": "3",
        "name": "2Y4",
        "type": "output",
        "description": "Three-state buffer output for channel 2Y4, driving up to 15 LSTTL loads with ±6 mA at 5 V."
      },
      {
        "number": "4",
        "name": "1A2",
        "type": "input",
        "description": "Data input to buffer 1 that must stay between 0 V and VCC; unused inputs must be tied to VCC or GND."
      },
      {
        "number": "5",
        "name": "2Y3",
        "type": "output",
        "description": "Three-state buffer output for channel 2Y3, driving up to 15 LSTTL loads with ±6 mA at 5 V."
      },
      {
        "number": "6",
        "name": "1A3",
        "type": "input",
        "description": "Data input to buffer 1 that must stay between 0 V and VCC; unused inputs must be tied to VCC or GND."
      },
      {
        "number": "7",
        "name": "2Y2",
        "type": "output",
        "description": "Three-state buffer output for channel 2Y2, driving up to 15 LSTTL loads with ±6 mA at 5 V."
      },
      {
        "number": "8",
        "name": "1A4",
        "type": "input",
        "description": "Data input to buffer 1 that must stay between 0 V and VCC; unused inputs must be tied to VCC or GND."
      },
      {
        "number": "9",
        "name": "2Y1",
        "type": "output",
        "description": "Three-state buffer output for channel 2Y1, driving up to 15 LSTTL loads with ±6 mA at 5 V."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "11",
        "name": "2A1",
        "type": "input",
        "description": "Data input to buffer 2 that must stay between 0 V and VCC; unused inputs must be tied to VCC or GND."
      },
      {
        "number": "12",
        "name": "1Y4",
        "type": "output",
        "description": "Three-state buffer output for channel 1Y4, driving up to 15 LSTTL loads with ±6 mA at 5 V."
      },
      {
        "number": "13",
        "name": "2A2",
        "type": "input",
        "description": "Data input to buffer 2 that must stay between 0 V and VCC; unused inputs must be tied to VCC or GND."
      },
      {
        "number": "14",
        "name": "1Y3",
        "type": "output",
        "description": "Three-state buffer output for channel 1Y3, driving up to 15 LSTTL loads with ±6 mA at 5 V."
      },
      {
        "number": "15",
        "name": "2A3",
        "type": "input",
        "description": "Data input to buffer 2 that must stay between 0 V and VCC; unused inputs must be tied to VCC or GND."
      },
      {
        "number": "16",
        "name": "1Y2",
        "type": "output",
        "description": "Three-state buffer output for channel 1Y2, driving up to 15 LSTTL loads with ±6 mA at 5 V."
      },
      {
        "number": "17",
        "name": "2A4",
        "type": "input",
        "description": "Data input to buffer 2 that must stay between 0 V and VCC; unused inputs must be tied to VCC or GND."
      },
      {
        "number": "18",
        "name": "1Y1",
        "type": "output",
        "description": "Three-state buffer output for channel 1Y1, driving up to 15 LSTTL loads with ±6 mA at 5 V."
      },
      {
        "number": "19",
        "name": "2OE",
        "type": "input",
        "description": "Active-low output enable for buffer 2; when low the 2A inputs pass non-inverted to the 2Y outputs, and when high the 2Y outputs are high-impedance."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, recommended 2 V to 6 V (absolute maximum 7 V)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Input and output-enable descriptions combine the Pin Functions table with limits and functional beha; Recommended VCC range 2 V to 6 V and absolute maximum 7 V are stated on page 4 rather than page 3; s; The datasheet lists the PW (TSSOP-20) package as SN74HC244PW; SN74HC244APWR appears only in the pack"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0785,
        "at": "2026-10-28T23:51:03"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74hc244a.pdf",
        "pages": 37,
        "sha256": "8bca6ed2074d65a9",
        "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"
    },
    "models_3d": [
      {
        "file": "sn74hc244apwr.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": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74hc244apwr-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": "a9aec568eab9e0e4a294fa2bc7d4026e1dfd4a9825c103761ecef0eb15ff64bf",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "PW0020A",
      "source_page": 33,
      "D": {
        "nom_mm": 6.5,
        "range_mm": [
          6.4,
          6.6
        ]
      },
      "E1": {
        "nom_mm": 4.4,
        "range_mm": [
          4.3,
          4.5
        ]
      },
      "E": {
        "nom_mm": 6.4,
        "range_mm": [
          6.2,
          6.6
        ]
      },
      "e": {
        "nom_mm": 0.65,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.2,
        "range_mm": [
          null,
          1.2
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "sn74hc244apwr.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}