MC74HCT595ADG

{
  "slug": "mc74hct595adg",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Registers, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "mc74hct595adg",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "mc74hct595adg.kicad_sym",
    "mc74hct595adg.kicad_mod",
    "mc74hct595adg.glb",
    "mc74hct595adg.step",
    "mc74hct595adg.lbr",
    "docs/hero.png",
    "docs/mc74hct595adg-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mc74hct595adg-hero.glb",
    "mc74hct595adg-hero.overlay.json",
    "mc74hct595adg-etched.glb"
  ],
  "component": {
    "mpn": "MC74HCT595ADG",
    "manufacturer": "onsemi",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Logic ICs",
    "subcategory": "Registers",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc74hct595a-d.pdf",
    "parts": {
      "symbol": "mc74hct595adg.kicad_sym",
      "footprint": "mc74hct595adg.kicad_mod",
      "model_3d": "mc74hct595adg-hero.glb",
      "model_3d_plain": "mc74hct595adg-etched.glb",
      "model_3d_step": "mc74hct595adg-etched.step",
      "model_3d_step_plain": "mc74hct595adg.step",
      "lbr": "mc74hct595adg.lbr"
    },
    "distributor_links": {
      "lcsc": "C906873",
      "digikey": "MC74HCT595ADGOS-ND",
      "mouser": "863-MC74HCT595ADG"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T22:53:02Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MC74HCT595ADGOS-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "863-MC74HCT595ADG",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "QB",
        "type": "tri_state",
        "description": "Noninverted, three-state parallel latch output B; forced to high impedance when Output Enable is high."
      },
      {
        "number": "2",
        "name": "QC",
        "type": "tri_state",
        "description": "Noninverted, three-state parallel latch output C; forced to high impedance when Output Enable is high."
      },
      {
        "number": "3",
        "name": "QD",
        "type": "tri_state",
        "description": "Noninverted, three-state parallel latch output D; forced to high impedance when Output Enable is high."
      },
      {
        "number": "4",
        "name": "QE",
        "type": "tri_state",
        "description": "Noninverted, three-state parallel latch output E; forced to high impedance when Output Enable is high."
      },
      {
        "number": "5",
        "name": "QF",
        "type": "tri_state",
        "description": "Noninverted, three-state parallel latch output F; forced to high impedance when Output Enable is high."
      },
      {
        "number": "6",
        "name": "QG",
        "type": "tri_state",
        "description": "Noninverted, three-state parallel latch output G; forced to high impedance when Output Enable is high."
      },
      {
        "number": "7",
        "name": "QH",
        "type": "tri_state",
        "description": "Noninverted, three-state parallel latch output H; forced to high impedance when Output Enable is high."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin; all voltages are referenced to GND, and VCC must be held between 4.5 and 5.5 V relative to it."
      },
      {
        "number": "9",
        "name": "SQH",
        "type": "output",
        "description": "Noninverted serial data output from the eighth shift register stage; it does not have three-state capability."
      },
      {
        "number": "10",
        "name": "RESET",
        "type": "input",
        "description": "Active-low asynchronous reset for the shift register only; a low resets the shift register and does not affect the 8-bit latch."
      },
      {
        "number": "11",
        "name": "SHIFT CLOCK",
        "type": "input",
        "description": "Shift register clock; a low-to-high transition shifts the data at the serial input A into the 8-bit shift register."
      },
      {
        "number": "12",
        "name": "LATCH CLOCK",
        "type": "input",
        "description": "Storage latch clock; a low-to-high transition latches the shift register data into the 8-bit latch."
      },
      {
        "number": "13",
        "name": "OUTPUT ENABLE",
        "type": "input",
        "description": "Active-low output enable; a low lets the latch data appear on QA-QH, while a high forces QA-QH into high impedance without affecting SQH."
      },
      {
        "number": "14",
        "name": "A",
        "type": "input",
        "description": "Serial data input shifted into the 8-bit shift register on each low-to-high shift clock transition."
      },
      {
        "number": "15",
        "name": "QA",
        "type": "tri_state",
        "description": "Noninverted, three-state parallel latch output A; forced to high impedance when Output Enable is high."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply pin; the recommended DC supply range is 4.5 to 5.5 V referenced to GND."
      }
    ],
    "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 PIN ASSIGNMENT graphic text in the extraction is scrambled. The pin-to-name mapping was taken fr; The datasheet covers SOIC-16 (DG and DR2G suffixes) and TSSOP-16 (DT suffix). MC74HCT595ADG is the S"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0774,
        "at": "2026-10-28T22:52:48"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mc74hct595a-d.pdf",
        "pages": 12,
        "sha256": "a09e1caabec3fe23",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mc74hct595adg.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mc74hct595adg-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
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          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "da064fe5c041608c4569990aa090f73d290def21d7caeb9a22c55fd24214f0df",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SOIC-16 (CASE 751B-05)",
      "source_page": 10,
      "D": {
        "nom_mm": 9.9,
        "range_mm": [
          9.8,
          10.0
        ]
      },
      "E1": {
        "nom_mm": 3.9,
        "range_mm": [
          3.8,
          4.0
        ]
      },
      "E": {
        "nom_mm": 6.0,
        "range_mm": [
          5.8,
          6.2
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.55,
        "range_mm": [
          1.35,
          1.75
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "mc74hct595adg.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}