SN74HC90DR

{
  "slug": "sn74hc90dr",
  "version": "0.1.0",
  "type": "component",
  "description": "lingxingic Counters, Dividers, SOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74hc90dr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hc90dr.kicad_sym",
    "sn74hc90dr.kicad_mod",
    "sn74hc90dr.glb",
    "sn74hc90dr.step",
    "sn74hc90dr.lbr",
    "docs/hero.png",
    "docs/sn74hc90dr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74hc90dr-hero.glb",
    "sn74hc90dr-hero.overlay.json",
    "sn74hc90dr-etched.glb"
  ],
  "component": {
    "mpn": "SN74HC90DR",
    "manufacturer": "lingxingic",
    "package": "SOP-14",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603323116403765248",
    "parts": {
      "symbol": "sn74hc90dr.kicad_sym",
      "footprint": "sn74hc90dr.kicad_mod",
      "model_3d": "sn74hc90dr-hero.glb",
      "model_3d_plain": "sn74hc90dr-etched.glb",
      "model_3d_step": "sn74hc90dr-etched.step",
      "model_3d_step_plain": "sn74hc90dr.step",
      "lbr": "sn74hc90dr.lbr"
    },
    "distributor_links": {
      "lcsc": "C22436998"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T06:26:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CKB",
        "type": "input",
        "description": "Clock input of the ÷5 section, active on the falling edge; count state changes are initiated by the falling edge of the clock."
      },
      {
        "number": "2",
        "name": "R0(1)",
        "type": "input",
        "description": "Master reset input; R0(1) and R0(2) both high with R9(1) and R9(2) not both high forces QD, QC, QB and QA low."
      },
      {
        "number": "3",
        "name": "R0(2)",
        "type": "input",
        "description": "Master reset input; R0(2) and R0(1) both high with R9(1) and R9(2) not both high forces QD, QC, QB and QA low."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; SN74HC90 operates from 2 V to 6 V and SN74HCT90 from 4.5 V to 5.5 V, with absolute maximum VCC of -0.5 V to +7 V."
      },
      {
        "number": "6",
        "name": "R9(1)",
        "type": "input",
        "description": "Master set input (preset 9); with R9(1) and R9(2) both high, the outputs are set to the count 9 (QD and QA high, QC and QB low)."
      },
      {
        "number": "7",
        "name": "R9(2)",
        "type": "input",
        "description": "Master set input (preset 9); with R9(2) and R9(1) both high, the outputs are set to the count 9 (QD and QA high, QC and QB low)."
      },
      {
        "number": "8",
        "name": "QC",
        "type": "output",
        "description": "Output from the ÷5 section (BCD count bit QC)."
      },
      {
        "number": "9",
        "name": "QB",
        "type": "output",
        "description": "Output from the ÷5 section (BCD count bit QB)."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages."
      },
      {
        "number": "11",
        "name": "QD",
        "type": "output",
        "description": "Output from the ÷5 section (BCD count bit QD)."
      },
      {
        "number": "12",
        "name": "QA",
        "type": "output",
        "description": "Output from the ÷2 section; QA is connected to CKB externally for BCD count."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "14",
        "name": "CKA",
        "type": "input",
        "description": "Clock input of the ÷2 section, active on the falling edge; QD is connected to CKA for bi-quinary count."
      }
    ],
    "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: Pin positions are taken from the 'Pin Description' table on page 7 (pin number to name mapping). The; Ordering information (page 5) lists SN74HC90DR(LX) / SN74HCT90DR(LX) as the SOP14 reel variants, con; The schema's 'spec' headline parameters were not requested as a field, so supply range and temperatu"
        ],
        "pages_sent": 18,
        "cost_usd": 0.0618,
        "at": "2026-10-18T06:21:28"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603323116403765248",
        "pages": 18,
        "sha256": "91ebe5c65ae35661",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "sn74hc90dr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74hc90dr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "8844fb987dc475f6bb85ab644a8967197a273afa6465bede9c76db630cc245be",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}