ATSAMD21J17A-MU

{
  "slug": "atsamd21j17a-mu",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Pre-ordered MCUs, QFN-64-EP(9x9). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atsamd21j17a-mu",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atsamd21j17a-mu.kicad_sym",
    "atsamd21j17a-mu.kicad_mod",
    "atsamd21j17a-mu.glb",
    "atsamd21j17a-mu.step",
    "atsamd21j17a-mu.lbr",
    "docs/hero.png",
    "docs/atsamd21j17a-mu-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atsamd21j17a-mu-hero.glb",
    "atsamd21j17a-mu-hero.overlay.json",
    "atsamd21j17a-mu-etched.glb"
  ],
  "component": {
    "mpn": "ATSAMD21J17A-MU",
    "manufacturer": "Microchip Tech",
    "package": "QFN-64-EP(9x9)",
    "pin_count": 65,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Pre-ordered MCUs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/d70e0a926271e38a2611b8b6dcc19c07.pdf",
    "parts": {
      "symbol": "atsamd21j17a-mu.kicad_sym",
      "footprint": "atsamd21j17a-mu.kicad_mod",
      "model_3d": "atsamd21j17a-mu-hero.glb",
      "model_3d_plain": "atsamd21j17a-mu-etched.glb",
      "model_3d_step": "atsamd21j17a-mu-etched.step",
      "model_3d_step_plain": "atsamd21j17a-mu.step",
      "lbr": "atsamd21j17a-mu.lbr"
    },
    "distributor_links": {
      "lcsc": "C614637",
      "digikey": "ATSAMD21J17A-MU-ND",
      "mouser": "556-ATSAMD21J17A-MU"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T16:13:59Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATSAMD21J17A-MU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "556-ATSAMD21J17A-MU",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PA00",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDANA, also EXTINT[0] and the XIN32 32kHz crystal input."
      },
      {
        "number": "2",
        "name": "PA01",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDANA, also EXTINT[1] and the XOUT32 32kHz crystal output."
      },
      {
        "number": "3",
        "name": "PA02",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDANA with analog input AIN[0], DAC output VOUT and EXTINT[2]."
      },
      {
        "number": "4",
        "name": "PA03",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDANA with analog input AIN[1], ADC/DAC reference VREFA and EXTINT[3]."
      },
      {
        "number": "5",
        "name": "PB04",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with analog input AIN[12] and EXTINT[4]."
      },
      {
        "number": "6",
        "name": "PB05",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with analog input AIN[13] and EXTINT[5]."
      },
      {
        "number": "7",
        "name": "GNDANA",
        "type": "power_in",
        "description": "Ground for the analog section of the device."
      },
      {
        "number": "8",
        "name": "VDDANA",
        "type": "power_in",
        "description": "Analog supply pin for the ADC, DAC and analog comparators; the SAM D21 operating range is 1.62V to 3.63V."
      },
      {
        "number": "9",
        "name": "PB06",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with analog input AIN[14] and EXTINT[6]."
      },
      {
        "number": "10",
        "name": "PB07",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with analog input AIN[15] and EXTINT[7]."
      },
      {
        "number": "11",
        "name": "PB08",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with analog input AIN[2], SERCOM4 PAD[0] and EXTINT[8]."
      },
      {
        "number": "12",
        "name": "PB09",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with analog input AIN[3], SERCOM4 PAD[1] and EXTINT[9]."
      },
      {
        "number": "13",
        "name": "PA04",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDANA with analog input AIN[4], SERCOM0 PAD[0] and EXTINT[4]."
      },
      {
        "number": "14",
        "name": "PA05",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDANA with analog input AIN[5], SERCOM0 PAD[1] and EXTINT[5]."
      },
      {
        "number": "15",
        "name": "PA06",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDANA with analog input AIN[6], SERCOM0 PAD[2] and EXTINT[6]."
      },
      {
        "number": "16",
        "name": "PA07",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDANA with analog input AIN[7], SERCOM0 PAD[3] and EXTINT[7]."
      },
      {
        "number": "17",
        "name": "PA08",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with NMI, analog input AIN[16], SERCOM0/SERCOM2 PAD[0] and TCC0 WO[0]."
      },
      {
        "number": "18",
        "name": "PA09",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[9], analog input AIN[17], SERCOM0/SERCOM2 PAD[1] and TCC0 WO[1]."
      },
      {
        "number": "19",
        "name": "PA10",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[10], analog input AIN[18], SERCOM0/SERCOM2 PAD[2] and I2S MCK[0]."
      },
      {
        "number": "20",
        "name": "PA11",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[11], analog input AIN[19], SERCOM0/SERCOM2 PAD[3] and I2S SCK[0]."
      },
      {
        "number": "21",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Digital I/O supply for the port pins; the SAM D21 operating range is 1.62V to 3.63V."
      },
      {
        "number": "22",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground for the device."
      },
      {
        "number": "23",
        "name": "PB10",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[10], SERCOM4 PAD[2], TC5 WO[0] and I2S MCK[1]."
      },
      {
        "number": "24",
        "name": "PB11",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[11], SERCOM4 PAD[3], TC5 WO[1] and I2S SCK[1]."
      },
      {
        "number": "25",
        "name": "PB12",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[12], PTC X[12], SERCOM4 PAD[0] and I2S FS[1]."
      },
      {
        "number": "26",
        "name": "PB13",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[13], PTC X[13], SERCOM4 PAD[1] and GCLK_IO[7]."
      },
      {
        "number": "27",
        "name": "PB14",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[14], PTC X[14], SERCOM4 PAD[2] and TC5 WO[0]."
      },
      {
        "number": "28",
        "name": "PB15",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[15], PTC X[15], SERCOM4 PAD[3] and TC5 WO[1]."
      },
      {
        "number": "29",
        "name": "PA12",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[12], SERCOM2/SERCOM4 PAD[0], TCC2 WO[0] and analog comparator output AC CMP[0]."
      },
      {
        "number": "30",
        "name": "PA13",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[13], SERCOM2/SERCOM4 PAD[1], TCC2 WO[1] and analog comparator output AC CMP[1]."
      },
      {
        "number": "31",
        "name": "PA14",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[14], SERCOM2/SERCOM4 PAD[2], and the XIN crystal input for XOSC."
      },
      {
        "number": "32",
        "name": "PA15",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[15], SERCOM2/SERCOM4 PAD[3], and the XOUT crystal output for XOSC."
      },
      {
        "number": "33",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground for the device."
      },
      {
        "number": "34",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Digital I/O supply for the port pins; the SAM D21 operating range is 1.62V to 3.63V."
      },
      {
        "number": "35",
        "name": "PA16",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[0], PTC X[4], SERCOM1/SERCOM3 PAD[0] and TCC2 WO[0]."
      },
      {
        "number": "36",
        "name": "PA17",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[1], PTC X[5], SERCOM1/SERCOM3 PAD[1] and TCC2 WO[1]."
      },
      {
        "number": "37",
        "name": "PA18",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[2], PTC X[6], SERCOM1/SERCOM3 PAD[2] and analog comparator output AC CMP[0]."
      },
      {
        "number": "38",
        "name": "PA19",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[3], PTC X[7], SERCOM1/SERCOM3 PAD[3] and analog comparator output AC CMP[1]."
      },
      {
        "number": "39",
        "name": "PB16",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[0], SERCOM5 PAD[0], TC6 WO[0] and I2S SD[1]."
      },
      {
        "number": "40",
        "name": "PB17",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[1], SERCOM5 PAD[1], TC6 WO[1] and I2S MCK[0]."
      },
      {
        "number": "41",
        "name": "PA20",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[4], PTC X[8], SERCOM5/SERCOM3 PAD[2] and I2S SCK[0]."
      },
      {
        "number": "42",
        "name": "PA21",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[5], PTC X[9], SERCOM5/SERCOM3 PAD[3] and I2S FS[0]."
      },
      {
        "number": "43",
        "name": "PA22",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[6], PTC X[10], SERCOM3/SERCOM5 PAD[0] and TC4 WO[0]."
      },
      {
        "number": "44",
        "name": "PA23",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[7], PTC X[11], SERCOM3/SERCOM5 PAD[1] and USB SOF 1kHz."
      },
      {
        "number": "45",
        "name": "PA24",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[12], SERCOM3/SERCOM5 PAD[2] and USB DM; the pin has no drive strength option and a pull-up is recommended if unconnected."
      },
      {
        "number": "46",
        "name": "PA25",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[13], SERCOM3/SERCOM5 PAD[3] and USB DP; the pin has no drive strength option and a pull-up is recommended if unconnected."
      },
      {
        "number": "47",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground for the device."
      },
      {
        "number": "48",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Digital I/O supply for the port pins; the SAM D21 operating range is 1.62V to 3.63V."
      },
      {
        "number": "49",
        "name": "PB22",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[6], SERCOM5 PAD[2], TC7 WO[0] and TCC3 WO[0]."
      },
      {
        "number": "50",
        "name": "PB23",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[7], SERCOM5 PAD[3], TC7 WO[1] and TCC3 WO[1]."
      },
      {
        "number": "51",
        "name": "PA27",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[15], TCC3 WO[6] and GCLK_IO[0]."
      },
      {
        "number": "52",
        "name": "RESET",
        "type": "input",
        "description": "External reset input (active low) for the device."
      },
      {
        "number": "53",
        "name": "PA28",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[8], TCC3 WO[7] and GCLK_IO[0]."
      },
      {
        "number": "54",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground for the device."
      },
      {
        "number": "55",
        "name": "VDDCORE",
        "type": "power_out",
        "description": "Regulated output supply of the internal voltage regulator that feeds the core logic."
      },
      {
        "number": "56",
        "name": "VDDIN",
        "type": "power_in",
        "description": "Input supply to the internal voltage regulator; the SAM D21 operating range is 1.62V to 3.63V."
      },
      {
        "number": "57",
        "name": "PA30",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[10], SERCOM1 PAD[2], TCC1 WO[0], TCC3 WO[4], and the SWCLK debug clock."
      },
      {
        "number": "58",
        "name": "PA31",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin on VDDIO with EXTINT[11], SERCOM1 PAD[3], TCC1 WO[1], TCC3 WO[5], and the SWDIO debug data (active only with a debugger present)."
      },
      {
        "number": "59",
        "name": "PB30",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[14], SERCOM5 PAD[0], TCC0 WO[0] and TCC1 WO[2]."
      },
      {
        "number": "60",
        "name": "PB31",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDIO with EXTINT[15], SERCOM5 PAD[1], TCC0 WO[1] and TCC1 WO[3]."
      },
      {
        "number": "61",
        "name": "PB00",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with EXTINT[0], analog input AIN[8], PTC Y[6], SERCOM5 PAD[2] and TC7 WO[0]."
      },
      {
        "number": "62",
        "name": "PB01",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with EXTINT[1], analog input AIN[9], PTC Y[7], SERCOM5 PAD[3] and TC7 WO[1]."
      },
      {
        "number": "63",
        "name": "PB02",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with EXTINT[2], analog input AIN[10], PTC Y[8], SERCOM5 PAD[0] and TC6 WO[0]."
      },
      {
        "number": "64",
        "name": "PB03",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O pin on VDDANA with EXTINT[3], analog input AIN[11], PTC Y[9], SERCOM5 PAD[1] and TC6 WO[1]."
      },
      {
        "number": "65",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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 datasheet pinout (page 19) lists pins 1-64 only. The exposed thermal pad of the 9x9 QFN is not g; The page 19 pinout diagram text is scrambled by the PDF layout. Pin-to-name assignments were taken f"
        ],
        "pages_sent": 118,
        "cost_usd": 0.1657,
        "at": "2026-10-28T16:13:46"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/d70e0a926271e38a2611b8b6dcc19c07.pdf",
        "pages": 1148,
        "sha256": "18ca1ccab5aa330f",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 65,
        "described": 65,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atsamd21j17a-mu.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.0,
          9.0,
          0.75
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dce07a86ec3fe3ca87eebdff13827f55e036ced5518fee01f85cec4a3f56366d",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atsamd21j17a-mu-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          9.0,
          0.75
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5e7ccda98f5c0ac1c4cafc6f9f86440e6afeaaeb17e6a1d4fba2d60adb8f926",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}