ATSAML21J18B-MUT

{
  "schema_version": 1,
  "type": "component",
  "slug": "atsaml21j18b-mut",
  "title": "ATSAML21J18B-MUT",
  "brief": "Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-64-EP(9x9). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "single chip microcomputer-microcontroller",
    "atsaml21j18b-mut",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ATSAML21J18B-MUT",
    "manufacturer": "Microchip Tech",
    "package": "QFN-64-EP(9x9)",
    "pin_count": 65,
    "category": "Single Chip Microcomputer/Microcontroller",
    "subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/41942ba97f76aad6042188ffe9080a2f.pdf",
    "parts": {
      "symbol": "atsaml21j18b-mut.kicad_sym",
      "footprint": "atsaml21j18b-mut.kicad_mod",
      "model_3d": "atsaml21j18b-mut-hero.glb",
      "model_3d_plain": "atsaml21j18b-mut-etched.glb",
      "model_3d_step": "atsaml21j18b-mut-etched.step",
      "model_3d_step_plain": "atsaml21j18b-mut.step",
      "lbr": "atsaml21j18b-mut.lbr"
    },
    "distributor_links": {
      "lcsc": "C2053754",
      "digikey": "ATSAML21J18B-MUTTR-ND",
      "mouser": "556-ATSAML21J18B-MUT"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T18:42:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATSAML21J18B-MUTTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "556-ATSAML21J18B-MUT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PA00",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[0]/EXTWAKE[0] and multiplexed peripheral functions; it is a backup-domain pin and doubles as XIN32 when the 32 kHz oscillator is used."
      },
      {
        "number": "2",
        "name": "PA01",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[1]/EXTWAKE[1] and multiplexed peripheral functions; it is a backup-domain pin and doubles as XOUT32 when the 32 kHz oscillator is used."
      },
      {
        "number": "3",
        "name": "PA02",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[2] and analog input AIN[0]/Y[0]/VOUT[0]; analog function is selected via peripheral function B."
      },
      {
        "number": "4",
        "name": "PA03",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[3] and analog input AIN[1]/Y[1]/VREFA; analog function is selected via peripheral function B."
      },
      {
        "number": "5",
        "name": "PB04",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[4] and analog inputs AIN[12]/Y[10]; supplied from VDDANA."
      },
      {
        "number": "6",
        "name": "PB05",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[5] and analog inputs AIN[13]/Y[11]/OA_NEG[1]; supplied from VDDANA."
      },
      {
        "number": "7",
        "name": "GNDANA",
        "type": "power_in",
        "description": "Ground for the analog power domain."
      },
      {
        "number": "8",
        "name": "VDDANA",
        "type": "power_in",
        "description": "Analog supply voltage of 1.6 V to 3.6 V (per the power connection table)."
      },
      {
        "number": "9",
        "name": "PB06",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[6] and analog inputs AIN[14]/Y[12]/OA_NEG[2]; supplied from VDDANA."
      },
      {
        "number": "10",
        "name": "PB07",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[7] and analog inputs AIN[15]/Y[13]; supplied from VDDANA."
      },
      {
        "number": "11",
        "name": "PB08",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[8], analog input AIN[2] and OA_OUT[1]; supplied from VDDANA."
      },
      {
        "number": "12",
        "name": "PB09",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[9], analog input AIN[3] and Y[15]/OA_POS[1]; supplied from VDDANA."
      },
      {
        "number": "13",
        "name": "PA04",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[4]/EXTWAKE[4] and analog inputs AIN[4]/AIN[0]/VREFB; supplied from VDDANA."
      },
      {
        "number": "14",
        "name": "PA05",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[5]/EXTWAKE[5] and analog inputs AIN[5]/AIN[1]/VOUT[1]; supplied from VDDANA."
      },
      {
        "number": "15",
        "name": "PA06",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[6]/EXTWAKE[6] and analog inputs AIN[6]/AIN[2]/Y[4]; supplied from VDDANA."
      },
      {
        "number": "16",
        "name": "PA07",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[7]/EXTWAKE[7] and analog inputs AIN[7]/AIN[3]/OA_OUT[0]; supplied from VDDANA."
      },
      {
        "number": "17",
        "name": "PA08",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with NMI, analog input AIN[16]/X[0]/Y[6], and SERCOM I2C-capable pad; a High Sink pin per the electrical characteristics, supplied from VDDIO."
      },
      {
        "number": "18",
        "name": "PA09",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[9], analog input AIN[17]/X[1]/Y[7], and SERCOM I2C-capable pad; a High Sink pin, supplied from VDDIO."
      },
      {
        "number": "19",
        "name": "PA10",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[10], analog input AIN[18]/X[2]/Y[8] and multiplexed peripheral functions; supplied from VDDIO."
      },
      {
        "number": "20",
        "name": "PA11",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[11], analog input AIN[19]/X[3]/Y[9] and multiplexed peripheral functions; supplied from VDDIO."
      },
      {
        "number": "21",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Digital I/O supply voltage of 1.6 V to 3.6 V."
      },
      {
        "number": "22",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for the digital domain."
      },
      {
        "number": "23",
        "name": "PB10",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[10], Y[2] and multiplexed peripheral functions; supplied from VDDIO."
      },
      {
        "number": "24",
        "name": "PB11",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[11], Y[3] and multiplexed peripheral functions; supplied from VDDIO."
      },
      {
        "number": "25",
        "name": "PB12",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[12], X[12]/Y[5] and I2C-capable SERCOM pad; I2C Standard/Fast mode output low current is limited, supplied from VDDIO."
      },
      {
        "number": "26",
        "name": "PB13",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[13], X[13]/Y[14] and I2C-capable SERCOM pad; I2C Standard/Fast mode output low current is limited, supplied from VDDIO."
      },
      {
        "number": "27",
        "name": "PB14",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[14], X[14] and multiplexed peripheral functions; supplied from VDDIO."
      },
      {
        "number": "28",
        "name": "PB15",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[15], X[15] and multiplexed peripheral functions; supplied from VDDIO."
      },
      {
        "number": "29",
        "name": "PA12",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[12], SERCOM pad and AC/CMP[0]; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIO."
      },
      {
        "number": "30",
        "name": "PA13",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[13], SERCOM pad and AC/CMP[1]; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIO."
      },
      {
        "number": "31",
        "name": "PA14",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[14] and multiplexed peripheral functions; doubles as XOSC XIN when the external crystal oscillator is used, supplied from VDDIO."
      },
      {
        "number": "32",
        "name": "PA15",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[15] and multiplexed peripheral functions; doubles as XOSC XOUT when the external crystal oscillator is used, supplied from VDDIO."
      },
      {
        "number": "33",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for the digital domain."
      },
      {
        "number": "34",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Digital I/O supply voltage of 1.6 V to 3.6 V."
      },
      {
        "number": "35",
        "name": "PA16",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[0], analog input X[4] and I2C-capable SERCOM pad; supplied from VDDIO."
      },
      {
        "number": "36",
        "name": "PA17",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[1], analog input X[5] and I2C-capable SERCOM pad; a High Sink pin, supplied from VDDIO."
      },
      {
        "number": "37",
        "name": "PA18",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[2], analog input X[6] and AC/CMP[0]; supplied from VDDIO."
      },
      {
        "number": "38",
        "name": "PA19",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[3], analog input X[7] and AC/CMP[1]; supplied from VDDIO."
      },
      {
        "number": "39",
        "name": "PB16",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[0] and SERCOM5 pad; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIO."
      },
      {
        "number": "40",
        "name": "PB17",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[1] and SERCOM5 pad; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIO."
      },
      {
        "number": "41",
        "name": "PA20",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[4], analog input X[8] and SERCOM pad; supplied from VDDIO."
      },
      {
        "number": "42",
        "name": "PA21",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[5], analog input X[9] and SERCOM pad; supplied from VDDIO."
      },
      {
        "number": "43",
        "name": "PA22",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[6], analog input X[10] and I2C-capable SERCOM pad; a High Sink pin, supplied from VDDIO."
      },
      {
        "number": "44",
        "name": "PA23",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[7], analog input X[11] and I2C-capable SERCOM pad; a High Sink pin, supplied from VDDIO."
      },
      {
        "number": "45",
        "name": "PA24",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[12] and USB DM; pull resistance is 50-150 kΩ on this pin, supplied from VDDIO."
      },
      {
        "number": "46",
        "name": "PA25",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[13] and USB DP; pull resistance is 50-150 kΩ on this pin, supplied from VDDIO."
      },
      {
        "number": "47",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for the digital domain."
      },
      {
        "number": "48",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Digital I/O supply voltage of 1.6 V to 3.6 V."
      },
      {
        "number": "49",
        "name": "PB22",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[6] and SERCOM5 pad; supplied from VDDIN."
      },
      {
        "number": "50",
        "name": "PB23",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[7] and SERCOM5 pad; supplied from VDDIN."
      },
      {
        "number": "51",
        "name": "PA27",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[15] and GCLK_IO[0]; a High Sink pin, supplied from VDDIN."
      },
      {
        "number": "52",
        "name": "RESET",
        "type": "input",
        "description": "External active-low reset input with an internal pull-up resistor."
      },
      {
        "number": "53",
        "name": "VSW",
        "type": "passive",
        "description": "Switching regulator output in switching mode, connected to VDDCORE via a 10 µH inductor; not connected in linear regulator mode."
      },
      {
        "number": "54",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for the digital domain."
      },
      {
        "number": "55",
        "name": "VDDCORE",
        "type": "passive",
        "description": "Core supply voltage of 0.9 V to 1.2 V typical; output of the internal regulator in linear mode, input when switching mode is used."
      },
      {
        "number": "56",
        "name": "VDDIN",
        "type": "power_in",
        "description": "Input supply voltage of 1.6 V to 3.6 V for the regulator and the VDDIN GPIO cluster."
      },
      {
        "number": "57",
        "name": "PA30",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[10] and SWCLK debug function; supplied from VDDIN."
      },
      {
        "number": "58",
        "name": "PA31",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O with EXTINT[11] and SWDIO debug function; a High Sink pin, supplied from VDDIN."
      },
      {
        "number": "59",
        "name": "PB30",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[14] and SERCOM5 pad; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIN."
      },
      {
        "number": "60",
        "name": "PB31",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[15] and SERCOM5 pad; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIN."
      },
      {
        "number": "61",
        "name": "PB00",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[0] and analog input AIN[8]; a backup-domain pin supplied from VSWOUT."
      },
      {
        "number": "62",
        "name": "PB01",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[1] and analog input AIN[9]; a backup-domain pin supplied from VSWOUT."
      },
      {
        "number": "63",
        "name": "PB02",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[2] and analog input AIN[10]; a backup-domain pin supplied from VSWOUT."
      },
      {
        "number": "64",
        "name": "PB03",
        "type": "bidirectional",
        "description": "Port B general-purpose I/O with EXTINT[3] and analog input AIN[11]; also the VBAT battery supply input when used for battery backup."
      },
      {
        "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 gives no separate QFN64 drawing; the pin numbers below come from the 64-pin pinout fig"
        ],
        "pages_sent": 119,
        "cost_usd": 0.1681,
        "at": "2026-10-31T18:42:12"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/41942ba97f76aad6042188ffe9080a2f.pdf",
        "pages": 1158,
        "sha256": "c7ade1efde79dc98",
        "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": [
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          9,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dce07a86ec3fe3ca87eebdff13827f55e036ced5518fee01f85cec4a3f56366d",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "up": "Z",
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        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "80a89744b20f90d76ef7be2ed8740e757813a827d2f48b4c8be2df69b31ec1e6",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-64-EP(9x9)",
      "Category": "Single Chip Microcomputer/Microcontroller",
      "Pins": "65"
    },
    "appearance": {
      "contacts": {
        "quote": "indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. In self-capacitance mode, the PTC requires only one pin (Y-line) for each touch sensor.",
        "page": 1034,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "c7ade1efde79dc98f4121e9e7cb057088832817d557836433f1ef2ccb256cba1"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "atsaml21j18b-mut"
  ],
  "discovery_pitch": "ATSAML21J18B-MUT (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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