74HC595BQ

{
  "slug": "74hc595bq",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Shift Registers, DHVQFN-16-EP(2.5x3.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74hc595bq",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "74hc595bq.kicad_sym",
    "74hc595bq.kicad_mod",
    "74hc595bq.glb",
    "74hc595bq.step",
    "74hc595bq.lbr",
    "docs/hero.png",
    "docs/74hc595bq-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hc595bq-hero.glb",
    "74hc595bq-hero.overlay.json",
    "74hc595bq-etched.glb"
  ],
  "component": {
    "mpn": "74HC595BQ",
    "manufacturer": "Nexperia",
    "package": "DHVQFN-16-EP(2.5x3.5)",
    "pin_count": 17,
    "category": "Logic",
    "subcategory": "Shift Registers",
    "datasheet": "https://assets.nexperia.com/documents/data-sheet/74HC595BQ.pdf",
    "parts": {
      "symbol": "74hc595bq.kicad_sym",
      "footprint": "74hc595bq.kicad_mod",
      "model_3d": "74hc595bq-hero.glb",
      "model_3d_plain": "74hc595bq-etched.glb",
      "model_3d_step": "74hc595bq-etched.step",
      "model_3d_step_plain": "74hc595bq.step",
      "lbr": "74hc595bq.lbr"
    },
    "distributor_links": {
      "lcsc": "C730243"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T17:21:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Q1",
        "type": "tri_state",
        "description": "Parallel data output Q1; goes high-impedance when OE is HIGH."
      },
      {
        "number": "2",
        "name": "Q2",
        "type": "tri_state",
        "description": "Parallel data output Q2; goes high-impedance when OE is HIGH."
      },
      {
        "number": "3",
        "name": "Q3",
        "type": "tri_state",
        "description": "Parallel data output Q3; goes high-impedance when OE is HIGH."
      },
      {
        "number": "4",
        "name": "Q4",
        "type": "tri_state",
        "description": "Parallel data output Q4; goes high-impedance when OE is HIGH."
      },
      {
        "number": "5",
        "name": "Q5",
        "type": "tri_state",
        "description": "Parallel data output Q5; goes high-impedance when OE is HIGH."
      },
      {
        "number": "6",
        "name": "Q6",
        "type": "tri_state",
        "description": "Parallel data output Q6; goes high-impedance when OE is HIGH."
      },
      {
        "number": "7",
        "name": "Q7",
        "type": "tri_state",
        "description": "Parallel data output Q7; goes high-impedance when OE is HIGH."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages on the device."
      },
      {
        "number": "9",
        "name": "Q7S",
        "type": "output",
        "description": "Serial data output used to cascade devices; it is not controlled by OE."
      },
      {
        "number": "10",
        "name": "MR",
        "type": "input",
        "description": "Master reset, active LOW; a LOW clears only the shift register and does not affect the storage register."
      },
      {
        "number": "11",
        "name": "SHCP",
        "type": "input",
        "description": "Shift register clock; data is shifted in on LOW-to-HIGH transitions."
      },
      {
        "number": "12",
        "name": "STCP",
        "type": "input",
        "description": "Storage register clock; a LOW-to-HIGH transition transfers the shift register contents to the storage register."
      },
      {
        "number": "13",
        "name": "OE",
        "type": "input",
        "description": "Output enable, active LOW; a HIGH forces Qn outputs to high-impedance without changing register contents."
      },
      {
        "number": "14",
        "name": "DS",
        "type": "input",
        "description": "Serial data input to shift register stage 0."
      },
      {
        "number": "15",
        "name": "Q0",
        "type": "tri_state",
        "description": "Parallel data output Q0; goes high-impedance when OE is HIGH."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage: 2.0 V to 6.0 V for 74HC595 (4.5 V to 5.5 V for 74HCT595) per recommended operating conditions."
      },
      {
        "number": "17",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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 datasheet gives 16 numbered terminals (1-16) for the DHVQFN16 package but does not assign a pin ; The DHVQFN16 pin map in the text is scrambled, and the figure carries a 'GND(1)' label whose footnot; Q7S is not listed as tri-state in the datasheet (OE only affects Qn outputs), so it is classed as a ",
          "exposed pad 17 added from the footprint"
        ],
        "pages_sent": 21,
        "cost_usd": 0.0984,
        "at": "2026-10-15T17:21:20"
      },
      "datasheet": {
        "url": "https://assets.nexperia.com/documents/data-sheet/74HC595BQ.pdf",
        "pages": 21,
        "sha256": "fa24207e780cd8c4",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "74hc595bq.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.52,
          3.52,
          0.9
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "9b55d657547b98c9235ee10b0265fe8d411e003433c35c725584c8bf5b7966c0",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc595bq-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "bdb8853d156cd098500e9a67d0a09dd6f03ba829431ad472c68d2d846c00df70",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}