SN74HC574PW

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74hc574pw",
  "title": "SN74HC574PW",
  "brief": "lingxingic SN74HC574PW LX Flip Flops, TSSOP-20. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "sn74hc574pw"
  ],
  "component": {
    "mpn": "SN74HC574PW",
    "manufacturer": "lingxingic SN74HC574PW LX",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Flip Flops",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2404021111_lingxingic-SN74HC574PW-LX_C22374075.pdf",
    "parts": {
      "symbol": "sn74hc574pw.kicad_sym",
      "footprint": "sn74hc574pw.kicad_mod",
      "model_3d": "sn74hc574pw-etched.glb",
      "model_3d_plain": "sn74hc574pw.glb",
      "model_3d_step": "sn74hc574pw-etched.step",
      "model_3d_step_plain": "sn74hc574pw.step",
      "lbr": "sn74hc574pw.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "/OE",
        "type": "input",
        "description": "3-state output enable, active low. When /OE = L the Q outputs are driven from the internal latch; when /OE = H all Q outputs enter high-impedance (Z). Does not affect the state of the internal latches."
      },
      {
        "number": "2",
        "name": "D0",
        "type": "input",
        "description": "Data input bit 0. Latched into internal flip-flop FF1 on the rising edge of CP; setup/hold timing per 3.3 electrical characteristics."
      },
      {
        "number": "3",
        "name": "D1",
        "type": "input",
        "description": "Data input bit 1. Latched into internal flip-flop FF2 on the rising edge of CP."
      },
      {
        "number": "4",
        "name": "D2",
        "type": "input",
        "description": "Data input bit 2. Latched into internal flip-flop FF3 on the rising edge of CP."
      },
      {
        "number": "5",
        "name": "D3",
        "type": "input",
        "description": "Data input bit 3. Latched into internal flip-flop FF4 on the rising edge of CP."
      },
      {
        "number": "6",
        "name": "D4",
        "type": "input",
        "description": "Data input bit 4. Latched into internal flip-flop FF5 on the rising edge of CP."
      },
      {
        "number": "7",
        "name": "D5",
        "type": "input",
        "description": "Data input bit 5. Latched into internal flip-flop FF6 on the rising edge of CP."
      },
      {
        "number": "8",
        "name": "D6",
        "type": "input",
        "description": "Data input bit 6. Latched into internal flip-flop FF7 on the rising edge of CP."
      },
      {
        "number": "9",
        "name": "D7",
        "type": "input",
        "description": "Data input bit 7. Latched into internal flip-flop FF8 on the rising edge of CP."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V). Return path for VCC."
      },
      {
        "number": "11",
        "name": "CP",
        "type": "input",
        "description": "Clock input, positive edge-triggered. All eight Dn inputs are transferred to the internal latches on the L->H transition of CP."
      },
      {
        "number": "12",
        "name": "Q7",
        "type": "tri_state",
        "description": "3-state flip-flop output bit 7 (from FF8). Driven when /OE = L; Hi-Z when /OE = H."
      },
      {
        "number": "13",
        "name": "Q6",
        "type": "tri_state",
        "description": "3-state flip-flop output bit 6 (from FF7). Driven when /OE = L; Hi-Z when /OE = H."
      },
      {
        "number": "14",
        "name": "Q5",
        "type": "tri_state",
        "description": "3-state flip-flop output bit 5 (from FF6). Driven when /OE = L; Hi-Z when /OE = H."
      },
      {
        "number": "15",
        "name": "Q4",
        "type": "tri_state",
        "description": "3-state flip-flop output bit 4 (from FF5). Driven when /OE = L; Hi-Z when /OE = H."
      },
      {
        "number": "16",
        "name": "Q3",
        "type": "tri_state",
        "description": "3-state flip-flop output bit 3 (from FF4). Driven when /OE = L; Hi-Z when /OE = H."
      },
      {
        "number": "17",
        "name": "Q2",
        "type": "tri_state",
        "description": "3-state flip-flop output bit 2 (from FF3). Driven when /OE = L; Hi-Z when /OE = H."
      },
      {
        "number": "18",
        "name": "Q1",
        "type": "tri_state",
        "description": "3-state flip-flop output bit 1 (from FF2). Driven when /OE = L; Hi-Z when /OE = H."
      },
      {
        "number": "19",
        "name": "Q0",
        "type": "tri_state",
        "description": "3-state flip-flop output bit 0 (from FF1). Driven when /OE = L; Hi-Z when /OE = H."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply. SN74HC574: 2.0-6.0 V (CMOS levels). SN74HCT574: 4.5-5.5 V (TTL-compatible input levels). Decouple to GND with 0.1 uF close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2404021111_lingxingic-SN74HC574PW-LX_C22374075.pdf",
        "pages": 20,
        "sha256": "4513b7374c86e098",
        "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"
    },
    "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": "74HC574",
      "logic_family": "74HC",
      "function_code": "574",
      "function_class": "Flip-Flop",
      "function_name": "Octal D Flip-Flop, 3-State",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
    "models_3d": [
      {
        "file": "sn74hc574pw.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": "sn74hc574pw-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": "a031a8e31f3d9b832cbda0421c68960d59b3f1d79a09f3ff40fcdfeffefd0ce3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "lingxingic",
      "Package": "TSSOP-20",
      "Category": "Logic",
      "Pins": "20"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sn74hc574pw"
  ],
  "discovery_pitch": "SN74HC574PW (lingxingic SN74HC574PW LX) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hc574pw.kicad_sym",
    "sn74hc574pw.kicad_mod",
    "sn74hc574pw.glb",
    "sn74hc574pw.step",
    "sn74hc574pw-etched.step",
    "sn74hc574pw.lbr",
    "docs/hero.png",
    "docs/sn74hc574pw-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SN74HC574PW",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC574PWN",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC574PWD",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC574PWNSR",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T07:09:14.512Z"
}