SN74HCT574DWR

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  "type": "component",
  "slug": "sn74hct574dwr",
  "title": "SN74HCT574DWR",
  "brief": "Texas Instruments Flip Flops, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "logic",
    "sn74hct574dwr",
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  "component": {
    "mpn": "SN74HCT574DWR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Flip Flops",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn74hct574",
    "parts": {
      "symbol": "sn74hct574dwr.kicad_sym",
      "footprint": "sn74hct574dwr.kicad_mod",
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      "model_3d_step_plain": "sn74hct574dwr.step",
      "lbr": "sn74hct574dwr.lbr"
    },
    "distributor_links": {
      "lcsc": 6788,
      "digikey": "296-14871-2-ND",
      "mouser": "595-SN74HCT574DWR"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T22:49:37Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-14871-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74HCT574DWR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1OE",
        "type": "input",
        "description": "Output Enable input for the first group of flip-flops, active low"
      },
      {
        "number": "2",
        "name": "1A1",
        "type": "input",
        "description": "Data input 1A1 for the first flip-flop of the first group"
      },
      {
        "number": "3",
        "name": "2Y4",
        "type": "tri_state",
        "description": "Tri-state output 2Y4 of the fourth flip-flop in the second group"
      },
      {
        "number": "4",
        "name": "1A2",
        "type": "input",
        "description": "Data input 1A2 for the second flip-flop of the first group"
      },
      {
        "number": "5",
        "name": "2Y3",
        "type": "tri_state",
        "description": "Tri-state output 2Y3 of the third flip-flop in the second group"
      },
      {
        "number": "6",
        "name": "1A3",
        "type": "input",
        "description": "Data input 1A3 for the third flip-flop of the first group"
      },
      {
        "number": "7",
        "name": "2Y2",
        "type": "tri_state",
        "description": "Tri-state output 2Y2 of the second flip-flop in the second group"
      },
      {
        "number": "8",
        "name": "1A4",
        "type": "input",
        "description": "Data input 1A4 for the fourth flip-flop of the first group"
      },
      {
        "number": "9",
        "name": "2Y1",
        "type": "tri_state",
        "description": "Tri-state output 2Y1 of the first flip-flop in the second group"
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground connection"
      },
      {
        "number": "11",
        "name": "2A1",
        "type": "input",
        "description": "Data input 2A1 for the first flip-flop of the second group"
      },
      {
        "number": "12",
        "name": "1Y4",
        "type": "tri_state",
        "description": "Tri-state output 1Y4 of the fourth flip-flop in the first group"
      },
      {
        "number": "13",
        "name": "2A2",
        "type": "input",
        "description": "Data input 2A2 for the second flip-flop of the second group"
      },
      {
        "number": "14",
        "name": "1Y3",
        "type": "tri_state",
        "description": "Tri-state output 1Y3 of the third flip-flop in the first group"
      },
      {
        "number": "15",
        "name": "2A3",
        "type": "input",
        "description": "Data input 2A3 for the third flip-flop of the second group"
      },
      {
        "number": "16",
        "name": "1Y2",
        "type": "tri_state",
        "description": "Tri-state output 1Y2 of the second flip-flop in the first group"
      },
      {
        "number": "17",
        "name": "2A4",
        "type": "input",
        "description": "Data input 2A4 for the fourth flip-flop of the second group"
      },
      {
        "number": "18",
        "name": "1Y1",
        "type": "tri_state",
        "description": "Tri-state output 1Y1 of the first flip-flop in the first group"
      },
      {
        "number": "19",
        "name": "2OE",
        "type": "input",
        "description": "Output Enable input for the second group of flip-flops, active low"
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply voltage, 4.5V to 5.5V"
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet timing specifications (Pages 5-6) and functional description (Page 8) reference a CLK "
        ],
        "pages_sent": 30,
        "cost_usd": 0.1867,
        "at": "2026-10-05T22:49:21"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn74hct574",
        "pages": 30,
        "sha256": "3288661ec63c48f4",
        "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-20-300mil",
      "Category": "Logic",
      "Pins": "20"
    }
  },
  "variants": [],
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  "discovery_triggers": [
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  "discovery_pitch": "SN74HCT574DWR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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}