CD74AC161M

{
  "schema_version": 1,
  "type": "component",
  "slug": "cd74ac161m",
  "title": "CD74AC161M",
  "brief": "Texas Instruments Counters, Dividers, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "cd74ac161m",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CD74AC161M",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/cd74ac161",
    "parts": {
      "symbol": "cd74ac161m.kicad_sym",
      "footprint": "cd74ac161m.kicad_mod",
      "model_3d": "cd74ac161m-etched.glb",
      "model_3d_plain": "cd74ac161m.glb",
      "model_3d_step": "cd74ac161m-etched.step",
      "model_3d_step_plain": "cd74ac161m.step",
      "lbr": "cd74ac161m.lbr"
    },
    "distributor_links": {
      "lcsc": "C1523332",
      "digikey": "2156-CD74AC161M-ND",
      "mouser": "595-CD74AC161M"
    },
    "distributor_check": {
      "checked_at": "2026-09-27T02:25:55Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-CD74AC161M-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "595-CD74AC161M",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLR",
        "type": "input",
        "description": "Asynchronous clear input, active low; sets all Q outputs to low regardless of CLK, LOAD, or enable inputs."
      },
      {
        "number": "2",
        "name": "CLK",
        "type": "input",
        "description": "Synchronous clock input, rising edge triggered."
      },
      {
        "number": "3",
        "name": "A",
        "type": "input",
        "description": "Data input A for parallel preset operation; loaded to QA when LOAD is low."
      },
      {
        "number": "4",
        "name": "B",
        "type": "input",
        "description": "Data input B for parallel preset operation; loaded to QB when LOAD is low."
      },
      {
        "number": "5",
        "name": "C",
        "type": "input",
        "description": "Data input C for parallel preset operation; loaded to QC when LOAD is low."
      },
      {
        "number": "6",
        "name": "D",
        "type": "input",
        "description": "Data input D for parallel preset operation; loaded to QD when LOAD is low."
      },
      {
        "number": "7",
        "name": "ENP",
        "type": "input",
        "description": "Count enable input; ENP and ENT must both be high for counting; does not affect RCO output."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground connection for power return and logic reference."
      },
      {
        "number": "9",
        "name": "LOAD",
        "type": "input",
        "description": "Parallel load input, active low; disables counting and loads data A-D to Q outputs on next clock edge."
      },
      {
        "number": "10",
        "name": "ENT",
        "type": "input",
        "description": "Count enable input; ENP and ENT must both be high for counting; feed-forward enables RCO at maximum count."
      },
      {
        "number": "11",
        "name": "QD",
        "type": "output",
        "description": "Counter output D (most significant bit) for 4-bit binary count."
      },
      {
        "number": "12",
        "name": "QC",
        "type": "output",
        "description": "Counter output C for 4-bit binary count."
      },
      {
        "number": "13",
        "name": "QB",
        "type": "output",
        "description": "Counter output B for 4-bit binary count."
      },
      {
        "number": "14",
        "name": "QA",
        "type": "output",
        "description": "Counter output A (least significant bit) for 4-bit binary count."
      },
      {
        "number": "15",
        "name": "RCO",
        "type": "output",
        "description": "Ripple carry output; high pulse when counter reaches maximum (9 or 15) and ENT is high."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply input voltage; operating range 1.5V to 5.5V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 23,
        "cost_usd": 0.1907,
        "at": "2026-09-27T02:25:37"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/cd74ac161",
        "pages": 23,
        "sha256": "cc0df0be38defb4e",
        "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": "cd74ac161m.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd74ac161m-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "05f97d72f1982de76854de4e1e1ab3d7f3ea8a07d5cb0b66a3a7413502d0875e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-16",
      "Category": "Logic",
      "Pins": "16"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cd74ac161m"
  ],
  "discovery_pitch": "CD74AC161M (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd74ac161m.kicad_sym",
    "cd74ac161m.kicad_mod",
    "cd74ac161m.glb",
    "cd74ac161m.step",
    "cd74ac161m.lbr",
    "docs/hero.png",
    "docs/cd74ac161m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  }
}