74AHC244BQ

{
  "slug": "74ahc244bq",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Buffers, Drivers, Receivers, Transceivers, DHVQFN-20-EP(2.5x4.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74ahc244bq",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74ahc244bq.kicad_sym",
    "74ahc244bq.kicad_mod",
    "74ahc244bq.glb",
    "74ahc244bq.step",
    "74ahc244bq.lbr",
    "docs/hero.png",
    "docs/74ahc244bq-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74ahc244bq-hero.glb",
    "74ahc244bq-hero.overlay.json",
    "74ahc244bq-etched.glb"
  ],
  "component": {
    "mpn": "74AHC244BQ",
    "manufacturer": "Nexperia",
    "package": "DHVQFN-20-EP(2.5x4.5)",
    "pin_count": 21,
    "category": "Logic",
    "subcategory": "Buffers, Drivers, Receivers, Transceivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588914722687635456",
    "parts": {
      "symbol": "74ahc244bq.kicad_sym",
      "footprint": "74ahc244bq.kicad_mod",
      "model_3d": "74ahc244bq-hero.glb",
      "model_3d_plain": "74ahc244bq-etched.glb",
      "model_3d_step": "74ahc244bq-etched.step",
      "model_3d_step_plain": "74ahc244bq.step",
      "lbr": "74ahc244bq.lbr"
    },
    "distributor_links": {
      "lcsc": "C554324"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T20:38:38Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1OE",
        "type": "input",
        "description": "Active-LOW output enable for outputs 1Y0 to 1Y3; a HIGH level forces these outputs to the high-impedance OFF-state."
      },
      {
        "number": "2",
        "name": "1A0",
        "type": "input",
        "description": "Data input 1A0 of the first 4-bit buffer section."
      },
      {
        "number": "3",
        "name": "2Y0",
        "type": "tri_state",
        "description": "3-state data output 2Y0 of the second 4-bit buffer section; high-impedance when 2OE is HIGH."
      },
      {
        "number": "4",
        "name": "1A1",
        "type": "input",
        "description": "Data input 1A1 of the first 4-bit buffer section."
      },
      {
        "number": "5",
        "name": "2Y1",
        "type": "tri_state",
        "description": "3-state data output 2Y1 of the second 4-bit buffer section; high-impedance when 2OE is HIGH."
      },
      {
        "number": "6",
        "name": "1A2",
        "type": "input",
        "description": "Data input 1A2 of the first 4-bit buffer section."
      },
      {
        "number": "7",
        "name": "2Y2",
        "type": "tri_state",
        "description": "3-state data output 2Y2 of the second 4-bit buffer section; high-impedance when 2OE is HIGH."
      },
      {
        "number": "8",
        "name": "1A3",
        "type": "input",
        "description": "Data input 1A3 of the first 4-bit buffer section."
      },
      {
        "number": "9",
        "name": "2Y3",
        "type": "tri_state",
        "description": "3-state data output 2Y3 of the second 4-bit buffer section; high-impedance when 2OE is HIGH."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V); all voltages are referenced to this pin."
      },
      {
        "number": "11",
        "name": "2A3",
        "type": "input",
        "description": "Data input 2A3 of the second 4-bit buffer section."
      },
      {
        "number": "12",
        "name": "1Y3",
        "type": "tri_state",
        "description": "3-state data output 1Y3 of the first 4-bit buffer section; high-impedance when 1OE is HIGH."
      },
      {
        "number": "13",
        "name": "2A2",
        "type": "input",
        "description": "Data input 2A2 of the second 4-bit buffer section."
      },
      {
        "number": "14",
        "name": "1Y2",
        "type": "tri_state",
        "description": "3-state data output 1Y2 of the first 4-bit buffer section; high-impedance when 1OE is HIGH."
      },
      {
        "number": "15",
        "name": "2A1",
        "type": "input",
        "description": "Data input 2A1 of the second 4-bit buffer section."
      },
      {
        "number": "16",
        "name": "1Y1",
        "type": "tri_state",
        "description": "3-state data output 1Y1 of the first 4-bit buffer section; high-impedance when 1OE is HIGH."
      },
      {
        "number": "17",
        "name": "2A0",
        "type": "input",
        "description": "Data input 2A0 of the second 4-bit buffer section."
      },
      {
        "number": "18",
        "name": "1Y0",
        "type": "tri_state",
        "description": "3-state data output 1Y0 of the first 4-bit buffer section; high-impedance when 1OE is HIGH."
      },
      {
        "number": "19",
        "name": "2OE",
        "type": "input",
        "description": "Active-LOW output enable for outputs 2Y0 to 2Y3; a HIGH level forces these outputs to the high-impedance OFF-state."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; recommended 2.0 V to 5.5 V for 74AHC244 and 4.5 V to 5.5 V for 74AHCT244, with absolute maximum -0.5 V to +7.0 V."
      },
      {
        "number": "21",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: The DHVQFN20 package has an exposed thermal pad labelled GND(1) in the pinning drawing. It is not a ; The BQ (DHVQFN20) pinning drawing text is garbled in the extraction. Pin numbers were taken from the",
          "exposed pad 21 added from the footprint"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0793,
        "at": "2026-10-18T20:38:15"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588914722687635456",
        "pages": 16,
        "sha256": "88158be09d84b926",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "74ahc244bq.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.52,
          4.52,
          0.9
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "355f1de0647ad9bfaf4818202524cd4b822162263d9e88438d1032551183c44c",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74ahc244bq-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.52,
          4.52,
          0.9
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ab86ecd3293e7fca397a4443253889053f4cf971f1ae999d6869dbe6427be9a8",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}