SN74LS169BN

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  "type": "component",
  "slug": "sn74ls169bn",
  "title": "SN74LS169BN",
  "brief": "Texas Instruments Counters / Dividers, PDIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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  "component": {
    "mpn": "SN74LS169BN",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-16",
    "pin_count": 16,
    "category": "Logic ICs",
    "subcategory": "Counters / Dividers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74ls169b.pdf",
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      "lbr": "sn74ls169bn.lbr"
    },
    "distributor_links": {
      "lcsc": "C1548008",
      "digikey": "2156-SN74LS169BN-ND",
      "mouser": "595-SN74LS169BN"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T23:01:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-SN74LS169BN-ND",
        "status": "found"
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      "mouser": {
        "pn": "595-SN74LS169BN",
        "status": "found"
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    },
    "pins": [
      {
        "number": "1",
        "name": "U/D",
        "type": "input",
        "description": "Up/down input: counts up when high and counts down when low, taking effect on the next clock pulse."
      },
      {
        "number": "2",
        "name": "CLK",
        "type": "input",
        "description": "Buffered clock input that triggers all four master-slave flip-flops on the rising (positive-going) edge."
      },
      {
        "number": "3",
        "name": "A",
        "type": "input",
        "description": "Data input A, preset into the counter synchronously when LOAD is low."
      },
      {
        "number": "4",
        "name": "B",
        "type": "input",
        "description": "Data input B, preset into the counter synchronously when LOAD is low."
      },
      {
        "number": "5",
        "name": "C",
        "type": "input",
        "description": "Data input C, preset into the counter synchronously when LOAD is low."
      },
      {
        "number": "6",
        "name": "D",
        "type": "input",
        "description": "Data input D, preset into the counter synchronously when LOAD is low."
      },
      {
        "number": "7",
        "name": "ENP",
        "type": "input",
        "description": "Active-low count-enable input; both ENP and ENT must be low to count."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "9",
        "name": "LOAD",
        "type": "input",
        "description": "Active-low synchronous load input; a low level disables counting and sets outputs to agree with data inputs after the next clock pulse."
      },
      {
        "number": "10",
        "name": "ENT",
        "type": "input",
        "description": "Active-low count-enable input that is also fed forward to enable the carry output; must be low to count."
      },
      {
        "number": "11",
        "name": "QD",
        "type": "output",
        "description": "Counter output D, the most significant bit."
      },
      {
        "number": "12",
        "name": "QC",
        "type": "output",
        "description": "Counter output C."
      },
      {
        "number": "13",
        "name": "QB",
        "type": "output",
        "description": "Counter output B."
      },
      {
        "number": "14",
        "name": "QA",
        "type": "output",
        "description": "Counter output A, the least significant bit."
      },
      {
        "number": "15",
        "name": "RCO",
        "type": "output",
        "description": "Active-low ripple carry output that pulses low at overflow to enable cascaded stages."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage."
      }
    ],
    "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: The electrical characteristics pages are blank in the supplied text, so no supply voltage limits are",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 21,
        "cost_usd": 0.3847,
        "at": "2026-10-30T23:01:16"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74ls169b.pdf",
        "pages": 21,
        "sha256": "64b70ed10dca50ff",
        "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"
    },
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        "units": "mm",
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        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
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        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "PDIP-16",
      "Category": "Logic ICs",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "64b70ed10dca50ff6ed56d35e282fa2a8e076195a3997347df1029aa07222040",
      "rows": [
        {
          "name": "Operating free-air temperature (orderable range)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "",
          "source_page": 12,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "SN74LS169BN (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}