74VHC161FT

{
  "slug": "74vhc161ft",
  "version": "0.1.0",
  "type": "component",
  "description": "TOSHIBA Counters, Dividers, TSSOP16B. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74vhc161ft",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74vhc161ft.kicad_sym",
    "74vhc161ft.kicad_mod",
    "74vhc161ft.glb",
    "74vhc161ft.step",
    "74vhc161ft.lbr",
    "docs/hero.png",
    "docs/74vhc161ft-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74vhc161ft-hero.glb",
    "74vhc161ft-hero.overlay.json",
    "74vhc161ft-etched.glb"
  ],
  "component": {
    "mpn": "74VHC161FT",
    "manufacturer": "TOSHIBA",
    "package": "TSSOP16B",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602986410269945856",
    "parts": {
      "symbol": "74vhc161ft.kicad_sym",
      "footprint": "74vhc161ft.kicad_mod",
      "model_3d": "74vhc161ft-hero.glb",
      "model_3d_plain": "74vhc161ft-etched.glb",
      "model_3d_step": "74vhc161ft-etched.step",
      "model_3d_step_plain": "74vhc161ft.step",
      "lbr": "74vhc161ft.lbr"
    },
    "distributor_links": {
      "lcsc": "C7421276"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T16:25:00Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLR",
        "type": "input",
        "description": "Active-low clear input that clears the counter asynchronously on the 74VHC161FT; accepts 0 to 5.5 V regardless of supply."
      },
      {
        "number": "2",
        "name": "CK",
        "type": "input",
        "description": "Clock input, active on the rising edge, with presetting synchronous to the rising edge of CK."
      },
      {
        "number": "3",
        "name": "A",
        "type": "input",
        "description": "Preset data input A (logic level loaded into QA when LOAD is low), 0 to 5.5 V input range."
      },
      {
        "number": "4",
        "name": "B",
        "type": "input",
        "description": "Preset data input B (logic level loaded into QB when LOAD is low), 0 to 5.5 V input range."
      },
      {
        "number": "5",
        "name": "C",
        "type": "input",
        "description": "Preset data input C (logic level loaded into QC when LOAD is low), 0 to 5.5 V input range."
      },
      {
        "number": "6",
        "name": "D",
        "type": "input",
        "description": "Preset data input D (logic level loaded into QD when LOAD is low), 0 to 5.5 V input range."
      },
      {
        "number": "7",
        "name": "ENP",
        "type": "input",
        "description": "Count enable input P, used with ENT to enable easy cascading of counters."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin (0 V)."
      },
      {
        "number": "9",
        "name": "LOAD",
        "type": "input",
        "description": "Active-low synchronous load input that presets the counter from A-D on the rising edge of CK."
      },
      {
        "number": "10",
        "name": "ENT",
        "type": "input",
        "description": "Count enable input T, which also gates the carry output (Carry = ENT·QA·QB·QC·QD) for cascading."
      },
      {
        "number": "11",
        "name": "QD",
        "type": "output",
        "description": "Counter output QD, the most significant bit of the 4-bit binary counter."
      },
      {
        "number": "12",
        "name": "QC",
        "type": "output",
        "description": "Counter output QC of the 4-bit binary counter."
      },
      {
        "number": "13",
        "name": "QB",
        "type": "output",
        "description": "Counter output QB of the 4-bit binary counter."
      },
      {
        "number": "14",
        "name": "QA",
        "type": "output",
        "description": "Counter output QA, the least significant bit of the 4-bit binary counter."
      },
      {
        "number": "15",
        "name": "Carry Output",
        "type": "output",
        "description": "Carry output (Carry = ENT·QA·QB·QC·QD) provided for cascading counters without external gates."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage pin, operating range 2.0 V to 5.5 V (absolute maximum -0.5 to 7.0 V)."
      }
    ],
    "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: Pin 11 is printed as 'QD' in the pin diagram; the function descriptions for A-D, ENP, ENT and output",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 17,
        "cost_usd": 0.3454,
        "at": "2026-10-17T16:22:15"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602986410269945856",
        "pages": 17,
        "sha256": "40d97dedc9e79c02",
        "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": "74vhc161ft.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74vhc161ft-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "97bb87cf69bcea531b1a6b45ae6e073cced4248da234240b7b9ab2a86ec66a94",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}