SN74HC273DBR

{
  "slug": "sn74hc273dbr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Flip Flops, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74hc273dbr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hc273dbr.kicad_sym",
    "sn74hc273dbr.kicad_mod",
    "sn74hc273dbr.glb",
    "sn74hc273dbr.step",
    "sn74hc273dbr.lbr",
    "docs/hero.png",
    "docs/sn74hc273dbr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74hc273dbr-hero.glb",
    "sn74hc273dbr-hero.overlay.json",
    "sn74hc273dbr-etched.glb"
  ],
  "component": {
    "mpn": "SN74HC273DBR",
    "manufacturer": "Texas Instruments",
    "package": "SSOP-20-208mil",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Flip Flops",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc273dbr.pdf",
    "parts": {
      "symbol": "sn74hc273dbr.kicad_sym",
      "footprint": "sn74hc273dbr.kicad_mod",
      "model_3d": "sn74hc273dbr-hero.glb",
      "model_3d_plain": "sn74hc273dbr-etched.glb",
      "model_3d_step": "sn74hc273dbr-etched.step",
      "model_3d_step_plain": "sn74hc273dbr.step",
      "lbr": "sn74hc273dbr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2877488",
      "digikey": "296-8295-2-ND",
      "mouser": "595-SN74HC273DBR"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T06:20:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-8295-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-SN74HC273DBR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLR",
        "type": "input",
        "description": "Active-low direct clear input (CLR) that resets the flip-flops independently of the clock."
      },
      {
        "number": "2",
        "name": "1Q",
        "type": "output",
        "description": "Output 1 of the positive-edge-triggered D flip-flop, which takes the D input value on the rising edge of CLK."
      },
      {
        "number": "3",
        "name": "1D",
        "type": "input",
        "description": "Data input 1; data meeting the setup-time requirement is transferred to 1Q on the positive CLK edge."
      },
      {
        "number": "4",
        "name": "2D",
        "type": "input",
        "description": "Data input 2; data meeting the setup-time requirement is transferred to 2Q on the positive CLK edge."
      },
      {
        "number": "5",
        "name": "2Q",
        "type": "output",
        "description": "Output 2 of the positive-edge-triggered D flip-flop."
      },
      {
        "number": "6",
        "name": "3Q",
        "type": "output",
        "description": "Output 3 of the positive-edge-triggered D flip-flop."
      },
      {
        "number": "7",
        "name": "3D",
        "type": "input",
        "description": "Data input 3; data meeting the setup-time requirement is transferred to 3Q on the positive CLK edge."
      },
      {
        "number": "8",
        "name": "4D",
        "type": "input",
        "description": "Data input 4; data meeting the setup-time requirement is transferred to 4Q on the positive CLK edge."
      },
      {
        "number": "9",
        "name": "4Q",
        "type": "output",
        "description": "Output 4 of the positive-edge-triggered D flip-flop."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the device."
      },
      {
        "number": "11",
        "name": "CLK",
        "type": "input",
        "description": "Clock input; the Q outputs update on the positive edge of CLK, and D has no effect while CLK is held high or low."
      },
      {
        "number": "12",
        "name": "5Q",
        "type": "output",
        "description": "Output 5 of the positive-edge-triggered D flip-flop."
      },
      {
        "number": "13",
        "name": "5D",
        "type": "input",
        "description": "Data input 5; data meeting the setup-time requirement is transferred to 5Q on the positive CLK edge."
      },
      {
        "number": "14",
        "name": "6D",
        "type": "input",
        "description": "Data input 6; data meeting the setup-time requirement is transferred to 6Q on the positive CLK edge."
      },
      {
        "number": "15",
        "name": "6Q",
        "type": "output",
        "description": "Output 6 of the positive-edge-triggered D flip-flop."
      },
      {
        "number": "16",
        "name": "7Q",
        "type": "output",
        "description": "Output 7 of the positive-edge-triggered D flip-flop."
      },
      {
        "number": "17",
        "name": "7D",
        "type": "input",
        "description": "Data input 7; data meeting the setup-time requirement is transferred to 7Q on the positive CLK edge."
      },
      {
        "number": "18",
        "name": "8D",
        "type": "input",
        "description": "Data input 8; data meeting the setup-time requirement is transferred to 8Q on the positive CLK edge."
      },
      {
        "number": "19",
        "name": "8Q",
        "type": "output",
        "description": "Output 8 of the positive-edge-triggered D flip-flop."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply pin; the recommended supply range is 2 V to 6 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin table on page 3 is a shared table for the J, W, DB, DW, N, NS and PW packages. The DB (SSOP-; The top-view pin-1 orientation drawing is an image and is not present in the extracted text. Pin num; The VCC description cites the 2 V to 6 V recommended supply range, which appears on page 4 (Recommen"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0576,
        "at": "2026-10-18T06:16:34"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74hc273dbr.pdf",
        "pages": 36,
        "sha256": "5f99e4392c073ec0",
        "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": [
      {
        "file": "sn74hc273dbr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9a01a276d0b4d9561efd58f2fcee56f52c1b6ab464ea7a0380cab4e87a924e6",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74hc273dbr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b406f42848d5e7d31287d991b6b564900bd8d5f5f4d6fe0b0272cfd5c8006c3e",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}