MM74HC273MTC

{
  "slug": "mm74hc273mtc",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Flip Flops, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "mm74hc273mtc",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mm74hc273mtc.kicad_sym",
    "mm74hc273mtc.kicad_mod",
    "mm74hc273mtc.glb",
    "mm74hc273mtc.step",
    "mm74hc273mtc.lbr",
    "docs/hero.png",
    "docs/mm74hc273mtc-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mm74hc273mtc-hero.glb",
    "mm74hc273mtc-hero.overlay.json",
    "mm74hc273mtc-etched.glb"
  ],
  "component": {
    "mpn": "MM74HC273MTC",
    "manufacturer": "onsemi",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic ICs",
    "subcategory": "Flip Flops",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mm74hc273mtc-d.pdf",
    "parts": {
      "symbol": "mm74hc273mtc.kicad_sym",
      "footprint": "mm74hc273mtc.kicad_mod",
      "model_3d": "mm74hc273mtc-hero.glb",
      "model_3d_plain": "mm74hc273mtc-etched.glb",
      "model_3d_step": "mm74hc273mtc-etched.step",
      "model_3d_step_plain": "mm74hc273mtc.step",
      "lbr": "mm74hc273mtc.lbr"
    },
    "distributor_links": {
      "lcsc": "C897483",
      "digikey": "2156-MM74HC273MTC-ND",
      "mouser": "512-MM74HC273MTC"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:58:38Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-MM74HC273MTC-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "512-MM74HC273MTC",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLEAR",
        "type": "input",
        "description": "Common active-low asynchronous clear input that sets all eight Q outputs low when held LOW."
      },
      {
        "number": "2",
        "name": "1Q",
        "type": "output",
        "description": "Flip-flop 1 Q output, drives up to 10 LS-TTL loads."
      },
      {
        "number": "3",
        "name": "1D",
        "type": "input",
        "description": "Flip-flop 1 data input, transferred to 1Q on the LOW-to-HIGH transition of CLOCK."
      },
      {
        "number": "4",
        "name": "2D",
        "type": "input",
        "description": "Flip-flop 2 data input, transferred to 2Q on the LOW-to-HIGH transition of CLOCK."
      },
      {
        "number": "5",
        "name": "2Q",
        "type": "output",
        "description": "Flip-flop 2 Q output, drives up to 10 LS-TTL loads."
      },
      {
        "number": "6",
        "name": "3Q",
        "type": "output",
        "description": "Flip-flop 3 Q output, drives up to 10 LS-TTL loads."
      },
      {
        "number": "7",
        "name": "3D",
        "type": "input",
        "description": "Flip-flop 3 data input, transferred to 3Q on the LOW-to-HIGH transition of CLOCK."
      },
      {
        "number": "8",
        "name": "4D",
        "type": "input",
        "description": "Flip-flop 4 data input, transferred to 4Q on the LOW-to-HIGH transition of CLOCK."
      },
      {
        "number": "9",
        "name": "4Q",
        "type": "output",
        "description": "Flip-flop 4 Q output, drives up to 10 LS-TTL loads."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "11",
        "name": "CLOCK",
        "type": "input",
        "description": "Common clock input, data is transferred to the outputs on the LOW-to-HIGH transition."
      },
      {
        "number": "12",
        "name": "5Q",
        "type": "output",
        "description": "Flip-flop 5 Q output, drives up to 10 LS-TTL loads."
      },
      {
        "number": "13",
        "name": "5D",
        "type": "input",
        "description": "Flip-flop 5 data input, transferred to 5Q on the LOW-to-HIGH transition of CLOCK."
      },
      {
        "number": "14",
        "name": "6D",
        "type": "input",
        "description": "Flip-flop 6 data input, transferred to 6Q on the LOW-to-HIGH transition of CLOCK."
      },
      {
        "number": "15",
        "name": "6Q",
        "type": "output",
        "description": "Flip-flop 6 Q output, drives up to 10 LS-TTL loads."
      },
      {
        "number": "16",
        "name": "7Q",
        "type": "output",
        "description": "Flip-flop 7 Q output, drives up to 10 LS-TTL loads."
      },
      {
        "number": "17",
        "name": "7D",
        "type": "input",
        "description": "Flip-flop 7 data input, transferred to 7Q on the LOW-to-HIGH transition of CLOCK."
      },
      {
        "number": "18",
        "name": "8D",
        "type": "input",
        "description": "Flip-flop 8 data input, transferred to 8Q on the LOW-to-HIGH transition of CLOCK."
      },
      {
        "number": "19",
        "name": "8Q",
        "type": "output",
        "description": "Flip-flop 8 Q output, drives up to 10 LS-TTL loads."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, recommended 2 V to 6 V (absolute maximum 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": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 10,
        "cost_usd": 0.2814,
        "at": "2026-10-22T21:58:17"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mm74hc273mtc-d.pdf",
        "pages": 10,
        "sha256": "62fb601c88bbaa9d",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "mm74hc273mtc.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mm74hc273mtc-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
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        "sha256": "a14c7cb8faafc2019ff431f6cea7d0aa76445c6cd273e83b610ab2e48ea4b4aa",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}