SN74ALVCH16721DLR

{
  "slug": "sn74alvch16721dlr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Flip Flops, SSOP-56-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74alvch16721dlr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74alvch16721dlr.kicad_sym",
    "sn74alvch16721dlr.kicad_mod",
    "sn74alvch16721dlr.glb",
    "sn74alvch16721dlr.step",
    "sn74alvch16721dlr.lbr",
    "docs/hero.png",
    "docs/sn74alvch16721dlr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74alvch16721dlr-hero.glb",
    "sn74alvch16721dlr-hero.overlay.json"
  ],
  "component": {
    "mpn": "SN74ALVCH16721DLR",
    "manufacturer": "Texas Instruments",
    "package": "SSOP-56-300mil",
    "pin_count": 56,
    "category": "Logic",
    "subcategory": "Flip Flops",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn74alvch16721",
    "parts": {
      "symbol": "sn74alvch16721dlr.kicad_sym",
      "footprint": "sn74alvch16721dlr.kicad_mod",
      "model_3d": "sn74alvch16721dlr-hero.glb",
      "model_3d_plain": "sn74alvch16721dlr.glb",
      "model_3d_step": "sn74alvch16721dlr-etched.step",
      "model_3d_step_plain": "sn74alvch16721dlr.step",
      "lbr": "sn74alvch16721dlr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2870824",
      "digikey": "296-5246-2-ND",
      "mouser": "595-74ALVCH16721DLR"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T02:40:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-5246-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-74ALVCH16721DLR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OE",
        "type": "input",
        "description": "Buffered output enable that puts the 20 outputs in a normal logic state or high-impedance state; tie to VCC through a pullup resistor to ensure high-impedance during power up or power down."
      },
      {
        "number": "2",
        "name": "Q1",
        "type": "tri_state",
        "description": "3-state output of flip-flop 1."
      },
      {
        "number": "3",
        "name": "Q2",
        "type": "tri_state",
        "description": "3-state output of flip-flop 2."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."
      },
      {
        "number": "5",
        "name": "Q3",
        "type": "tri_state",
        "description": "3-state output of flip-flop 3."
      },
      {
        "number": "6",
        "name": "Q4",
        "type": "tri_state",
        "description": "3-state output of flip-flop 4."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 1.65 V to 3.6 V recommended."
      },
      {
        "number": "8",
        "name": "Q5",
        "type": "tri_state",
        "description": "3-state output of flip-flop 5."
      },
      {
        "number": "9",
        "name": "Q6",
        "type": "tri_state",
        "description": "3-state output of flip-flop 6."
      },
      {
        "number": "10",
        "name": "Q7",
        "type": "tri_state",
        "description": "3-state output of flip-flop 7."
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."
      },
      {
        "number": "12",
        "name": "Q8",
        "type": "tri_state",
        "description": "3-state output of flip-flop 8."
      },
      {
        "number": "13",
        "name": "Q9",
        "type": "tri_state",
        "description": "3-state output of flip-flop 9."
      },
      {
        "number": "14",
        "name": "Q10",
        "type": "tri_state",
        "description": "3-state output of flip-flop 10."
      },
      {
        "number": "15",
        "name": "Q11",
        "type": "tri_state",
        "description": "3-state output of flip-flop 11."
      },
      {
        "number": "16",
        "name": "Q12",
        "type": "tri_state",
        "description": "3-state output of flip-flop 12."
      },
      {
        "number": "17",
        "name": "Q13",
        "type": "tri_state",
        "description": "3-state output of flip-flop 13."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."
      },
      {
        "number": "19",
        "name": "Q14",
        "type": "tri_state",
        "description": "3-state output of flip-flop 14."
      },
      {
        "number": "20",
        "name": "Q15",
        "type": "tri_state",
        "description": "3-state output of flip-flop 15."
      },
      {
        "number": "21",
        "name": "Q16",
        "type": "tri_state",
        "description": "3-state output of flip-flop 16."
      },
      {
        "number": "22",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 1.65 V to 3.6 V recommended."
      },
      {
        "number": "23",
        "name": "Q17",
        "type": "tri_state",
        "description": "3-state output of flip-flop 17."
      },
      {
        "number": "24",
        "name": "Q18",
        "type": "tri_state",
        "description": "3-state output of flip-flop 18."
      },
      {
        "number": "25",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."
      },
      {
        "number": "26",
        "name": "Q19",
        "type": "tri_state",
        "description": "3-state output of flip-flop 19."
      },
      {
        "number": "27",
        "name": "Q20",
        "type": "tri_state",
        "description": "3-state output of flip-flop 20."
      },
      {
        "number": "28",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "29",
        "name": "CLKEN",
        "type": "input",
        "description": "Clock enable; when low, data is stored on the positive CLK transition, and when high no data is stored."
      },
      {
        "number": "30",
        "name": "D20",
        "type": "input",
        "description": "Data input for flip-flop 20 with bus hold."
      },
      {
        "number": "31",
        "name": "D19",
        "type": "input",
        "description": "Data input for flip-flop 19 with bus hold."
      },
      {
        "number": "32",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."
      },
      {
        "number": "33",
        "name": "D18",
        "type": "input",
        "description": "Data input for flip-flop 18 with bus hold."
      },
      {
        "number": "34",
        "name": "D17",
        "type": "input",
        "description": "Data input for flip-flop 17 with bus hold."
      },
      {
        "number": "35",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 1.65 V to 3.6 V recommended."
      },
      {
        "number": "36",
        "name": "D16",
        "type": "input",
        "description": "Data input for flip-flop 16 with bus hold."
      },
      {
        "number": "37",
        "name": "D15",
        "type": "input",
        "description": "Data input for flip-flop 15 with bus hold."
      },
      {
        "number": "38",
        "name": "D14",
        "type": "input",
        "description": "Data input for flip-flop 14 with bus hold."
      },
      {
        "number": "39",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."
      },
      {
        "number": "40",
        "name": "D13",
        "type": "input",
        "description": "Data input for flip-flop 13 with bus hold."
      },
      {
        "number": "41",
        "name": "D12",
        "type": "input",
        "description": "Data input for flip-flop 12 with bus hold."
      },
      {
        "number": "42",
        "name": "D11",
        "type": "input",
        "description": "Data input for flip-flop 11 with bus hold."
      },
      {
        "number": "43",
        "name": "D10",
        "type": "input",
        "description": "Data input for flip-flop 10 with bus hold."
      },
      {
        "number": "44",
        "name": "D9",
        "type": "input",
        "description": "Data input for flip-flop 9 with bus hold."
      },
      {
        "number": "45",
        "name": "D8",
        "type": "input",
        "description": "Data input for flip-flop 8 with bus hold."
      },
      {
        "number": "46",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."
      },
      {
        "number": "47",
        "name": "D7",
        "type": "input",
        "description": "Data input for flip-flop 7 with bus hold."
      },
      {
        "number": "48",
        "name": "D6",
        "type": "input",
        "description": "Data input for flip-flop 6 with bus hold."
      },
      {
        "number": "49",
        "name": "D5",
        "type": "input",
        "description": "Data input for flip-flop 5 with bus hold."
      },
      {
        "number": "50",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 1.65 V to 3.6 V recommended."
      },
      {
        "number": "51",
        "name": "D4",
        "type": "input",
        "description": "Data input for flip-flop 4 with bus hold."
      },
      {
        "number": "52",
        "name": "D3",
        "type": "input",
        "description": "Data input for flip-flop 3 with bus hold."
      },
      {
        "number": "53",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; continuous current through each VCC or GND is limited to ±100 mA."
      },
      {
        "number": "54",
        "name": "D2",
        "type": "input",
        "description": "Data input for flip-flop 2 with bus hold."
      },
      {
        "number": "55",
        "name": "D1",
        "type": "input",
        "description": "Data input for flip-flop 1 with bus hold."
      },
      {
        "number": "56",
        "name": "CLK",
        "type": "input",
        "description": "Clock input; data is stored on the positive transition when CLKEN is low."
      }
    ],
    "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": 18,
        "cost_usd": 0.1795,
        "at": "2026-10-07T02:39:51"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn74alvch16721",
        "pages": 18,
        "sha256": "dec914c4a56319a2",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 56,
        "described": 56,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "sn74alvch16721dlr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.35,
          18.5,
          2.99
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "496b138c9bddb6111fccc97928b5e654846ac39b68862745293b24c720d158e5",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74alvch16721dlr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.35,
          18.5,
          2.99
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "44b5dcb9533e392c820bb01de2c4ea67cd4ef23612509667263acc63b46a3f38",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}