SN74LV161APWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74lv161apwr",
  "title": "SN74LV161APWR",
  "brief": "Texas Instruments Counters, Dividers, TSSOP-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": [
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    "logic",
    "sn74lv161apwr",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "SN74LV161APWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74lv161a.pdf",
    "parts": {
      "symbol": "sn74lv161apwr.kicad_sym",
      "footprint": "sn74lv161apwr.kicad_mod",
      "model_3d": "sn74lv161apwr-hero.glb",
      "model_3d_plain": "sn74lv161apwr.glb",
      "model_3d_step": "sn74lv161apwr-etched.step",
      "model_3d_step_plain": "sn74lv161apwr.step",
      "lbr": "sn74lv161apwr.lbr"
    },
    "distributor_links": {
      "lcsc": 2649404,
      "digikey": "296-12344-2-ND",
      "mouser": "595-SN74LV161APWR"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T20:10:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-12344-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-SN74LV161APWR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLR",
        "type": "input",
        "description": "Asynchronous active-low clear that sets all four flip-flop outputs low regardless of CLK, LOAD or enable inputs."
      },
      {
        "number": "2",
        "name": "CLK",
        "type": "input",
        "description": "Buffered clock input that triggers the four flip-flops on the rising (positive-going) edge."
      },
      {
        "number": "3",
        "name": "A",
        "type": "input",
        "description": "Preset data input A, loaded to QA on the next clock pulse when LOAD is low."
      },
      {
        "number": "4",
        "name": "B",
        "type": "input",
        "description": "Preset data input B, loaded to QB on the next clock pulse when LOAD is low."
      },
      {
        "number": "5",
        "name": "C",
        "type": "input",
        "description": "Preset data input C, loaded to QC on the next clock pulse when LOAD is low."
      },
      {
        "number": "6",
        "name": "D",
        "type": "input",
        "description": "Preset data input D, loaded to QD on the next clock pulse when LOAD is low."
      },
      {
        "number": "7",
        "name": "ENP",
        "type": "input",
        "description": "Count-enable input; both ENP and ENT must be high to count, and transitions are allowed regardless of CLK level."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "9",
        "name": "LOAD",
        "type": "input",
        "description": "Synchronous active-low load input that disables counting and presets outputs to A-D data after the next clock pulse."
      },
      {
        "number": "10",
        "name": "ENT",
        "type": "input",
        "description": "Count-enable input that must be high to count and is fed forward to enable RCO."
      },
      {
        "number": "11",
        "name": "QD",
        "type": "output",
        "description": "Counter output D; drive up to ±12 mA at VCC = 4.5 V to 5.5 V."
      },
      {
        "number": "12",
        "name": "QC",
        "type": "output",
        "description": "Counter output C; drive up to ±12 mA at VCC = 4.5 V to 5.5 V."
      },
      {
        "number": "13",
        "name": "QB",
        "type": "output",
        "description": "Counter output B; drive up to ±12 mA at VCC = 4.5 V to 5.5 V."
      },
      {
        "number": "14",
        "name": "QA",
        "type": "output",
        "description": "Counter output A; drive up to ±12 mA at VCC = 4.5 V to 5.5 V."
      },
      {
        "number": "15",
        "name": "RCO",
        "type": "output",
        "description": "Ripple-carry output that produces a high-level pulse at maximum count (9 or 15 with QA high) to enable cascaded stages."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 2 V to 5.5 V recommended operating range (absolute maximum 7 V)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 28,
        "cost_usd": 0.1607,
        "at": "2026-10-05T20:10:07"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74lv161a.pdf",
        "pages": 28,
        "sha256": "964a83f61a59c69c",
        "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-16",
      "Category": "Logic",
      "Pins": "16"
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
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  "discovery_triggers": [
    "sn74lv161apwr"
  ],
  "discovery_pitch": "SN74LV161APWR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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    "sn74lv161apwr.step",
    "sn74lv161apwr.lbr",
    "docs/hero.png",
    "docs/sn74lv161apwr-datasheet.pdf",
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    "viewers/footprint.html",
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  "visibility": {
    "public": true
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}