HCF4021YM013TR

{
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  "type": "component",
  "slug": "hcf4021ym013tr",
  "title": "HCF4021YM013TR",
  "brief": "STMicroelectronics Shift Registers, SO-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "logic",
    "hcf4021ym013tr",
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  "component": {
    "mpn": "HCF4021YM013TR",
    "manufacturer": "STMicroelectronics",
    "package": "SO-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Shift Registers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590224443873398784",
    "parts": {
      "symbol": "hcf4021ym013tr.kicad_sym",
      "footprint": "hcf4021ym013tr.kicad_mod",
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      "model_3d_plain": "hcf4021ym013tr.glb",
      "model_3d_step": "hcf4021ym013tr-etched.step",
      "model_3d_step_plain": "hcf4021ym013tr.step",
      "lbr": "hcf4021ym013tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2970816",
      "digikey": "497-14371-2-ND",
      "mouser": "511-HCF4021YM013TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-06T16:35:51Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-14371-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-HCF4021YM013TR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PI-8",
        "type": "input",
        "description": "Parallel input to stage 8 of the shift register for asynchronous jam entry when parallel/serial control input is high."
      },
      {
        "number": "2",
        "name": "Q6",
        "type": "output",
        "description": "Buffered Q output from shift register stage 6."
      },
      {
        "number": "3",
        "name": "Q7",
        "type": "output",
        "description": "Buffered Q output from shift register stage 7."
      },
      {
        "number": "4",
        "name": "PI-4",
        "type": "input",
        "description": "Parallel input to stage 4 of the shift register for asynchronous jam entry when parallel/serial control input is high."
      },
      {
        "number": "5",
        "name": "PI-3",
        "type": "input",
        "description": "Parallel input to stage 3 of the shift register for asynchronous jam entry when parallel/serial control input is high."
      },
      {
        "number": "6",
        "name": "PI-2",
        "type": "input",
        "description": "Parallel input to stage 2 of the shift register for asynchronous jam entry when parallel/serial control input is high."
      },
      {
        "number": "7",
        "name": "PI-1",
        "type": "input",
        "description": "Parallel input to stage 1 of the shift register for asynchronous jam entry when parallel/serial control input is high."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Negative supply voltage (ground reference)."
      },
      {
        "number": "9",
        "name": "PARALLEL/SERIAL CONTROL",
        "type": "input",
        "description": "Parallel/serial control input; low selects serial shift mode, high selects parallel jam mode."
      },
      {
        "number": "10",
        "name": "CLOCK",
        "type": "input",
        "description": "Clock input; positive edge triggers synchronous data entry in the selected mode."
      },
      {
        "number": "11",
        "name": "SERIAL IN",
        "type": "input",
        "description": "Serial data input for shifting data into the register when parallel/serial control input is low."
      },
      {
        "number": "12",
        "name": "Q8",
        "type": "output",
        "description": "Buffered Q output from shift register stage 8 (final serial output)."
      },
      {
        "number": "13",
        "name": "PI-5",
        "type": "input",
        "description": "Parallel input to stage 5 of the shift register for asynchronous jam entry when parallel/serial control input is high."
      },
      {
        "number": "14",
        "name": "PI-6",
        "type": "input",
        "description": "Parallel input to stage 6 of the shift register for asynchronous jam entry when parallel/serial control input is high."
      },
      {
        "number": "15",
        "name": "PI-7",
        "type": "input",
        "description": "Parallel input to stage 7 of the shift register for asynchronous jam entry when parallel/serial control input is high."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply voltage; operating range 3 to 20 V per recommended operating conditions."
      }
    ],
    "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": 13,
        "cost_usd": 0.1071,
        "at": "2026-10-06T16:35:34"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590224443873398784",
        "pages": 13,
        "sha256": "b0614a47daab20a5",
        "source_tier": "lcsc"
      },
      "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SO-16",
      "Category": "Logic",
      "Pins": "16"
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "HCF4021YM013TR (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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  "visibility": {
    "public": true
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}