AiP74HCT244TA20.TR

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  "slug": "aip74hct244ta20-tr",
  "title": "AiP74HCT244TA20.TR",
  "brief": "Wuxi I core Elec 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": [
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  "component": {
    "mpn": "AiP74HCT244TA20.TR",
    "manufacturer": "Wuxi I core Elec",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffer/Driver/Transceiver",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2208111800_Wuxi-I-core-Elec-AiP74HCT244TA20-TR_C5139320.pdf",
    "parts": {
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      "footprint": "aip74hct244ta20-tr.kicad_mod",
      "model_3d": "aip74hct244ta20-tr-etched.glb",
      "model_3d_plain": "aip74hct244ta20-tr.glb",
      "model_3d_step": "aip74hct244ta20-tr-etched.step",
      "model_3d_step_plain": "aip74hct244ta20-tr.step",
      "lbr": "aip74hct244ta20-tr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "1OE",
        "type": "input",
        "description": "Output enable for group 1 (1Y0..1Y3), active low. High level tri-states the group-1 outputs."
      },
      {
        "number": "2",
        "name": "1A0",
        "type": "input",
        "description": "Data input, channel 1 bit 0. Buffered to 1Y0 when 1OE is low."
      },
      {
        "number": "3",
        "name": "2Y0",
        "type": "tri_state",
        "description": "Bus output, channel 2 bit 0. Follows 2A0 when 2OE is low; high-Z when 2OE is high."
      },
      {
        "number": "4",
        "name": "1A1",
        "type": "input",
        "description": "Data input, channel 1 bit 1. Buffered to 1Y1 when 1OE is low."
      },
      {
        "number": "5",
        "name": "2Y1",
        "type": "tri_state",
        "description": "Bus output, channel 2 bit 1. Follows 2A1 when 2OE is low; high-Z when 2OE is high."
      },
      {
        "number": "6",
        "name": "1A2",
        "type": "input",
        "description": "Data input, channel 1 bit 2. Buffered to 1Y2 when 1OE is low."
      },
      {
        "number": "7",
        "name": "2Y2",
        "type": "tri_state",
        "description": "Bus output, channel 2 bit 2. Follows 2A2 when 2OE is low; high-Z when 2OE is high."
      },
      {
        "number": "8",
        "name": "1A3",
        "type": "input",
        "description": "Data input, channel 1 bit 3. Buffered to 1Y3 when 1OE is low."
      },
      {
        "number": "9",
        "name": "2Y3",
        "type": "tri_state",
        "description": "Bus output, channel 2 bit 3. Follows 2A3 when 2OE is low; high-Z when 2OE is high."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference, 0 V."
      },
      {
        "number": "11",
        "name": "2A3",
        "type": "input",
        "description": "Data input, channel 2 bit 3. Buffered to 2Y3 when 2OE is low."
      },
      {
        "number": "12",
        "name": "1Y3",
        "type": "tri_state",
        "description": "Bus output, channel 1 bit 3. Follows 1A3 when 1OE is low; high-Z when 1OE is high."
      },
      {
        "number": "13",
        "name": "2A2",
        "type": "input",
        "description": "Data input, channel 2 bit 2. Buffered to 2Y2 when 2OE is low."
      },
      {
        "number": "14",
        "name": "1Y2",
        "type": "tri_state",
        "description": "Bus output, channel 1 bit 2. Follows 1A2 when 1OE is low; high-Z when 1OE is high."
      },
      {
        "number": "15",
        "name": "2A1",
        "type": "input",
        "description": "Data input, channel 2 bit 1. Buffered to 2Y1 when 2OE is low."
      },
      {
        "number": "16",
        "name": "1Y1",
        "type": "tri_state",
        "description": "Bus output, channel 1 bit 1. Follows 1A1 when 1OE is low; high-Z when 1OE is high."
      },
      {
        "number": "17",
        "name": "2A0",
        "type": "input",
        "description": "Data input, channel 2 bit 0. Buffered to 2Y0 when 2OE is low."
      },
      {
        "number": "18",
        "name": "1Y0",
        "type": "tri_state",
        "description": "Bus output, channel 1 bit 0. Follows 1A0 when 1OE is low; high-Z when 1OE is high."
      },
      {
        "number": "19",
        "name": "2OE",
        "type": "input",
        "description": "Output enable for group 2 (2Y0..2Y3), active low. High level tri-states the group-2 outputs."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage. Recommended 4.5-5.5 V for HCT variant (2.0-6.0 V for HC); absolute max 7.0 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2208111800_Wuxi-I-core-Elec-AiP74HCT244TA20-TR_C5139320.pdf",
        "pages": 18,
        "sha256": "36eef0eb359fbb5f",
        "source_tier": "lcsc"
      },
      "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": "74HCT244",
      "logic_family": "74HCT",
      "function_code": "244",
      "function_class": "Buffer",
      "function_name": "Octal Buffer/Driver, Non-Inverting, 3-State",
      "manufacturer": "Wuxi I-core Elec",
      "is_specialty": false
    },
    "models_3d": [
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        "file": "aip74hct244ta20-tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          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": "aip74hct244ta20-tr-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": "3940e3f7b254b300b9df8991ebb2db9f641271fb894f29f67f5750f2a22bfca4",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Wuxi I core Elec",
      "Package": "TSSOP-20",
      "Category": "Logic",
      "Pins": "20"
    }
  },
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
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  "discovery_pitch": "AiP74HCT244TA20.TR (Wuxi I core Elec) 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",
    "aip74hct244ta20-tr.kicad_sym",
    "aip74hct244ta20-tr.kicad_mod",
    "aip74hct244ta20-tr.glb",
    "aip74hct244ta20-tr.step",
    "aip74hct244ta20-tr-etched.step",
    "aip74hct244ta20-tr.lbr",
    "docs/hero.png",
    "docs/aip74hct244ta20-tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T16:12:16.060Z"
}