SN74HC4040DBR

{
  "slug": "sn74hc4040dbr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Counters, Dividers, SSOP-16-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74hc4040dbr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hc4040dbr.kicad_sym",
    "sn74hc4040dbr.kicad_mod",
    "sn74hc4040dbr.glb",
    "sn74hc4040dbr.step",
    "sn74hc4040dbr.lbr",
    "docs/hero.png",
    "docs/sn74hc4040dbr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74hc4040dbr-hero.glb",
    "sn74hc4040dbr-hero.overlay.json"
  ],
  "component": {
    "mpn": "SN74HC4040DBR",
    "manufacturer": "Texas Instruments",
    "package": "SSOP-16-208mil",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn54hc4040",
    "parts": {
      "symbol": "sn74hc4040dbr.kicad_sym",
      "footprint": "sn74hc4040dbr.kicad_mod",
      "model_3d": "sn74hc4040dbr-hero.glb",
      "model_3d_plain": "sn74hc4040dbr.glb",
      "model_3d_step": "sn74hc4040dbr-etched.step",
      "model_3d_step_plain": "sn74hc4040dbr.step",
      "lbr": "sn74hc4040dbr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2860162",
      "digikey": "296-8323-2-ND",
      "mouser": "595-SN74HC4040DBR"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T09:27:02Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-8323-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-SN74HC4040DBR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "QL",
        "type": "output",
        "description": "Counter stage 12 output; counter advances on high-to-low CLK transition, drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "2",
        "name": "QF",
        "type": "output",
        "description": "Counter stage 6 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "3",
        "name": "QE",
        "type": "output",
        "description": "Counter stage 5 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "4",
        "name": "QG",
        "type": "output",
        "description": "Counter stage 7 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "5",
        "name": "QD",
        "type": "output",
        "description": "Counter stage 4 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "6",
        "name": "QC",
        "type": "output",
        "description": "Counter stage 3 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "7",
        "name": "QB",
        "type": "output",
        "description": "Counter stage 2 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through VCC or GND is limited to ±50 mA."
      },
      {
        "number": "9",
        "name": "QA",
        "type": "output",
        "description": "Counter stage 1 output (first stage, tpd from CLK typically 16 ns at 4.5 V); drives up to 10 LSTTL loads."
      },
      {
        "number": "10",
        "name": "CLK",
        "type": "input",
        "description": "Clock input; count advances on a high-to-low transition, max clock frequency 22 MHz at 4.5 V for SN74HC4040."
      },
      {
        "number": "11",
        "name": "CLR",
        "type": "input",
        "description": "Asynchronous clear; a high level resets the counter and sets all outputs low, minimum pulse width 18 ns at 4.5 V."
      },
      {
        "number": "12",
        "name": "QI",
        "type": "output",
        "description": "Counter stage 9 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "13",
        "name": "QH",
        "type": "output",
        "description": "Counter stage 8 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "14",
        "name": "QJ",
        "type": "output",
        "description": "Counter stage 10 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "15",
        "name": "QK",
        "type": "output",
        "description": "Counter stage 11 output; drives up to 10 LSTTL loads, ±4 mA at 5 V."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 2 V to 6 V recommended (absolute max 7 V); bypass with a 0.1-µF capacitor close to the pin."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Stage letters QA..QL are mapped to stage numbers 1..12 by alphabetical order. The datasheet text doe",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 31,
        "cost_usd": 0.4509,
        "at": "2026-10-11T09:26:46"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn54hc4040",
        "pages": 31,
        "sha256": "864adadf9c12e530",
        "source_tier": "lcsc"
      },
      "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": "sn74hc4040dbr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          6.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d0e11e46aeca5dbaa5c4bb538f3f4899761267cabdeba6486325ae9e979c03ef",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74hc4040dbr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          6.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "61778cf7735c0c2028d13b335b702999802b6f8a786ea20509e2a16944a4f72f",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}