MC74HC74ADR2G

{
  "schema_version": 1,
  "type": "component",
  "slug": "mc74hc74adr2g",
  "title": "MC74HC74ADR2G",
  "brief": "onsemi Flip Flops, SOIC-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "mc74hc74adr2g"
  ],
  "component": {
    "mpn": "MC74HC74ADR2G",
    "manufacturer": "onsemi",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Flip Flops",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc74hc74a-d.pdf",
    "parts": {
      "symbol": "mc74hc74adr2g.kicad_sym",
      "footprint": "mc74hc74adr2g.kicad_mod",
      "model_3d": "mc74hc74adr2g-etched.glb",
      "model_3d_plain": "mc74hc74adr2g.glb",
      "model_3d_step": "mc74hc74adr2g-etched.step",
      "model_3d_step_plain": "mc74hc74adr2g.step",
      "lbr": "mc74hc74adr2g.lbr"
    },
    "distributor_links": {
      "digikey": "MC74HC74ADR2GOSTR-ND",
      "mouser": "863-MC74HC74ADR2G",
      "lcsc": "C7345"
    },
    "pins": [
      {
        "number": "1",
        "name": "RESET1",
        "type": "input",
        "description": "Asynchronous active-low reset for flip-flop 1. When low, forces Q1 low and Q1̄ high independent of clock."
      },
      {
        "number": "2",
        "name": "DATA1",
        "type": "input",
        "description": "D-input for flip-flop 1. Sampled on the rising edge of CLOCK1 and transferred to Q1."
      },
      {
        "number": "3",
        "name": "CLOCK1",
        "type": "input",
        "description": "Clock input for flip-flop 1. Rising edge transfers DATA1 to Q1. Max clock frequency 35 MHz at Vcc=6 V."
      },
      {
        "number": "4",
        "name": "SET1",
        "type": "input",
        "description": "Asynchronous active-low set for flip-flop 1. When low, forces Q1 high and Q1̄ low independent of clock."
      },
      {
        "number": "5",
        "name": "Q1",
        "type": "output",
        "description": "True (non-inverted) output of flip-flop 1. Drives 10 LSTTL loads."
      },
      {
        "number": "6",
        "name": "~Q1",
        "type": "output",
        "description": "Complementary (inverted) output of flip-flop 1."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V)."
      },
      {
        "number": "8",
        "name": "~Q2",
        "type": "output",
        "description": "Complementary (inverted) output of flip-flop 2."
      },
      {
        "number": "9",
        "name": "Q2",
        "type": "output",
        "description": "True (non-inverted) output of flip-flop 2. Drives 10 LSTTL loads."
      },
      {
        "number": "10",
        "name": "SET2",
        "type": "input",
        "description": "Asynchronous active-low set for flip-flop 2. When low, forces Q2 high and Q2̄ low independent of clock."
      },
      {
        "number": "11",
        "name": "CLOCK2",
        "type": "input",
        "description": "Clock input for flip-flop 2. Rising edge transfers DATA2 to Q2."
      },
      {
        "number": "12",
        "name": "DATA2",
        "type": "input",
        "description": "D-input for flip-flop 2. Sampled on the rising edge of CLOCK2 and transferred to Q2."
      },
      {
        "number": "13",
        "name": "RESET2",
        "type": "input",
        "description": "Asynchronous active-low reset for flip-flop 2. When low, forces Q2 low and Q2̄ high independent of clock."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply. 2.0 V to 6.0 V for HC; 4.5 V to 5.5 V for HCT variant. Absolute max 6.5 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mc74hc74a-d.pdf",
        "pages": 13,
        "sha256": "39ae893cd4838f9c",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -3.81
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-14_3.9x8.7mm_P1.27mm@sha256:a885b619b22880c9",
      "mark": "drawn"
    },
    "logic": {
      "family_id": "74HC74",
      "logic_family": "74HC",
      "function_code": "74",
      "function_class": "Flip-Flop",
      "function_name": "Dual D Flip-Flop with Set/Reset",
      "manufacturer": "Onsemi (Motorola legacy)",
      "is_specialty": false
    },
    "models_3d": [
      {
        "file": "mc74hc74adr2g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mc74hc74adr2g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "cf4fcc166e5ff9c8179fd49443b3cf35ddca1fc1487f5d65e9b009a1f93c3b68",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOIC-14",
      "Category": "Logic",
      "Pins": "14"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mc74hc74adr2g"
  ],
  "discovery_pitch": "MC74HC74ADR2G (onsemi) 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",
    "mc74hc74adr2g.kicad_sym",
    "mc74hc74adr2g.kicad_mod",
    "mc74hc74adr2g.glb",
    "mc74hc74adr2g.step",
    "mc74hc74adr2g-etched.step",
    "mc74hc74adr2g.lbr",
    "docs/hero.png",
    "docs/mc74hc74adr2g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "MC74HC74ADR2G",
      "kind": "packaging"
    },
    {
      "mpn": "MC74HC74ADR2GDG",
      "kind": "packaging"
    },
    {
      "mpn": "MC74HC74ADR2GD",
      "kind": "packaging"
    },
    {
      "mpn": "MC74HC74ADR2GDTR2G",
      "kind": "packaging"
    },
    {
      "mpn": "MC74HC74ADR2GDTG",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-28T18:53:26.005Z"
}