ATSAML21E18B-MUT

{
  "slug": "atsaml21e18b-mut",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Global Sourcing Parts, QFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "global sourcing parts",
    "atsaml21e18b-mut",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atsaml21e18b-mut.kicad_sym",
    "atsaml21e18b-mut.kicad_mod",
    "atsaml21e18b-mut.glb",
    "atsaml21e18b-mut.step",
    "atsaml21e18b-mut.lbr",
    "docs/hero.png",
    "docs/atsaml21e18b-mut-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atsaml21e18b-mut-hero.glb",
    "atsaml21e18b-mut-hero.overlay.json",
    "atsaml21e18b-mut-etched.glb"
  ],
  "component": {
    "mpn": "ATSAML21E18B-MUT",
    "manufacturer": "Microchip Tech",
    "package": "QFN-32(5x5)",
    "pin_count": 33,
    "category": "Global Sourcing Parts",
    "subcategory": "Global Sourcing Parts",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589784501984391168",
    "parts": {
      "symbol": "atsaml21e18b-mut.kicad_sym",
      "footprint": "atsaml21e18b-mut.kicad_mod",
      "model_3d": "atsaml21e18b-mut-hero.glb",
      "model_3d_plain": "atsaml21e18b-mut-etched.glb",
      "model_3d_step": "atsaml21e18b-mut-etched.step",
      "model_3d_step_plain": "atsaml21e18b-mut.step",
      "lbr": "atsaml21e18b-mut.lbr"
    },
    "distributor_links": {
      "lcsc": "C220866",
      "digikey": "ATSAML21E18B-MUTTR-ND",
      "mouser": "556-ATSAML21E18B-MUT"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T18:26:33Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATSAML21E18B-MUTTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "556-ATSAML21E18B-MUT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PA00",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA00, supplied from VSWOUT; alternate functions include EXTINT[0]/EXTWAKE[0], SERCOM1 PAD[0], TCC2 WO[0] and the XIN32 32 kHz oscillator input."
      },
      {
        "number": "2",
        "name": "PA01",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA01, supplied from VSWOUT; alternate functions include EXTINT[1]/EXTWAKE[1], SERCOM1 PAD[1], TCC2 WO[1] and the XOUT32 32 kHz oscillator output."
      },
      {
        "number": "3",
        "name": "PA02",
        "type": "bidirectional",
        "description": "Port A I/O PA02 supplied from VDDANA with analog functions AIN[0], Y[0], VOUT[0] and OA_NEG[0] plus EXTINT[2]/EXTWAKE[2]; enabling an analog peripheral disables the digital function of the pin."
      },
      {
        "number": "4",
        "name": "PA03",
        "type": "bidirectional",
        "description": "Port A I/O PA03 supplied from VDDANA with analog functions VREFA, AIN[1] and Y[1] plus EXTINT[3]/EXTWAKE[3]; enabling an analog peripheral disables the digital function of the pin."
      },
      {
        "number": "5",
        "name": "PA04",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA04 supplied from VDDANA; alternate functions include VREFB, AIN[4], AIN[0], OA_OUT[2], EXTINT[4]/EXTWAKE[4], SERCOM0 PAD[0] and TCC0 WO[0]."
      },
      {
        "number": "6",
        "name": "PA05",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA05 supplied from VDDANA; alternate functions include AIN[5], AIN[1], VOUT[1], OA_POS[2], EXTINT[5]/EXTWAKE[5], SERCOM0 PAD[1] and TCC0 WO[1]."
      },
      {
        "number": "7",
        "name": "PA06",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA06 supplied from VDDANA; alternate functions include AIN[6], AIN[2], Y[4], OA_POS[0], EXTINT[6]/EXTWAKE[6], SERCOM0 PAD[2] and TCC1 WO[0]."
      },
      {
        "number": "8",
        "name": "PA07",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA07 supplied from VDDANA; alternate functions include AIN[7], AIN[3], OA_OUT[0], EXTINT[7]/EXTWAKE[7], SERCOM0 PAD[3] and TCC1 WO[1]."
      },
      {
        "number": "9",
        "name": "VDDANA",
        "type": "power_in",
        "description": "Analog supply voltage of 1.6 V to 3.6 V, decoupled with 100 nF and 10 µF capacitors, with a ferrite bead recommended to keep digital noise out of the analog domain."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "11",
        "name": "PA08",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA08, a High Sink pin, supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include NMI, AIN[16], X[0], Y[6], SERCOM0/SERCOM2 PAD[0], TCC0 WO[0] and TCC1 WO[2]."
      },
      {
        "number": "12",
        "name": "PA09",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA09, a High Sink pin, supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[9], AIN[17], X[1], Y[7], SERCOM0/SERCOM2 PAD[1], TCC0 WO[1] and TCC1 WO[3]."
      },
      {
        "number": "13",
        "name": "PA10",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA10 supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[10], AIN[18], X[2], Y[8], SERCOM0/SERCOM2 PAD[2], TCC1 WO[0], TCC0 WO[2] and GCLK_IO[4]."
      },
      {
        "number": "14",
        "name": "PA11",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA11 supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[11], AIN[19], X[3], Y[9], SERCOM0/SERCOM2 PAD[3], TCC1 WO[1], TCC0 WO[3] and GCLK_IO[5]."
      },
      {
        "number": "15",
        "name": "PA14",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA14 supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[14], SERCOM2/SERCOM4 PAD[2], TC4 WO[0], TCC0 WO[4], GCLK_IO[0] and the XIN oscillator input."
      },
      {
        "number": "16",
        "name": "PA15",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA15 supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[15], SERCOM2/SERCOM4 PAD[3], TC4 WO[1], TCC0 WO[5], GCLK_IO[1] and the XOUT oscillator output."
      },
      {
        "number": "17",
        "name": "PA16",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA16, a High Sink pin, supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[0], X[4], SERCOM1/SERCOM3 PAD[0], TCC2 WO[0], TCC0 WO[6], GCLK_IO[2] and CCL0 IN[0] and supports SERCOM I2C."
      },
      {
        "number": "18",
        "name": "PA17",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA17, a High Sink pin, supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[1], X[5], SERCOM1/SERCOM3 PAD[1], TCC2 WO[1], TCC0 WO[7], GCLK_IO[3] and CCL0 IN[1] and supports SERCOM I2C."
      },
      {
        "number": "19",
        "name": "PA18",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA18 supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[2], X[6], SERCOM1/SERCOM3 PAD[2], TC4 WO[0], TCC0 WO[2], AC/CMP[0] and CCL0 IN[2]."
      },
      {
        "number": "20",
        "name": "PA19",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA19 supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[3], X[7], SERCOM1/SERCOM3 PAD[3], TC4 WO[1], TCC0 WO[3], AC/CMP[1] and CCL0 OUT."
      },
      {
        "number": "21",
        "name": "PA22",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA22, a High Sink pin, supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[6], X[10], SERCOM3/SERCOM5 PAD[0], TC0 WO[0], TCC0 WO[4], GCLK_IO[6] and CCL2 IN[0] and supports SERCOM I2C."
      },
      {
        "number": "22",
        "name": "PA23",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA23, a High Sink pin, supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[7], X[11], SERCOM3/SERCOM5 PAD[1], TC0 WO[1], TCC0 WO[5], USB SOF 1 kHz, GCLK_IO[7] and CCL2 IN[1] and supports SERCOM I2C."
      },
      {
        "number": "23",
        "name": "PA24",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA24, supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[12], SERCOM3/SERCOM5 PAD[2], TC1 WO[0], TCC1 WO[2], USB DM and CCL2 IN[2]; its pull resistance is 50-150 kΩ."
      },
      {
        "number": "24",
        "name": "PA25",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA25, supplied from VDDIO (which on SAM L21E is supplied through VDDANA); alternate functions include EXTINT[13], SERCOM3/SERCOM5 PAD[3], TC1 WO[1], TCC1 WO[3], USB DP and CCL2 OUT; its pull resistance is 50-150 kΩ."
      },
      {
        "number": "25",
        "name": "PA27",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA27, a High Sink pin, supplied from VDDIN with alternate functions EXTINT[15] and GCLK_IO[0]."
      },
      {
        "number": "26",
        "name": "RESET",
        "type": "input",
        "description": "Active-low external reset input with an internal pull-up; the low-level threshold is below 0.36×VDDIO at 2.7-3.6 V and below 0.33×VDDIO at 1.6-2.0 V, and a 100 nF filter capacitor and 330 Ω series resistor are recommended."
      },
      {
        "number": "27",
        "name": "VSW",
        "type": "power_out",
        "description": "On-chip switching regulator output that must connect to VDDCORE through a 10 µH inductor with saturation current above 150 mA and DCR below 1 Ω in switching mode, and is not connected in linear mode."
      },
      {
        "number": "28",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "29",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Core supply pin at 0.9 V to 1.2 V typical, decoupled with 100 nF and 1 µF; in linear regulator mode it is the core supply output for external decoupling, and in switched mode it is the core supply input connected to VSW via inductor."
      },
      {
        "number": "30",
        "name": "VDDIN",
        "type": "power_in",
        "description": "Digital supply voltage of 1.6 V to 3.6 V, decoupled with 100 nF and 10 µF capacitors and a 10 µH filtering inductor."
      },
      {
        "number": "31",
        "name": "PA30",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA30 supplied from VDDIN; alternate functions include EXTINT[10], SERCOM1/PAD[2], TCC1 WO[0], GCLK_IO[0] and CCL1 IN[0], and it is the CORTEX_M0P SWCLK serial wire clock pin."
      },
      {
        "number": "32",
        "name": "PA31",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O PA31 supplied from VDDIN; alternate functions include EXTINT[11], SERCOM1/PAD[3], TCC1 WO[1] and CCL1 OUT, and it is the SWDIO serial wire data pin, which is activated only when a debugger is present."
      },
      {
        "number": "33",
        "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: VDDIO is not a separate pin on SAM L21E; note 6 on page 30 states VDDIO is electrically connected to; The datasheet does not give a pin number for the QFN exposed paddle; section 51.2.2 only states it m; VDDCORE is typed power_in, but the datasheet describes it as a linear-regulator output in linear mod",
          "exposed pad 33 added from the footprint",
          "5/33 pins cited to the wrong page (name found elsewhere): ['9:VDDANA@p1121', '26:RESET@p1126', '27:VSW@p1122', '29:VDDCORE@p1122']"
        ],
        "pages_sent": 119,
        "cost_usd": 0.5935,
        "at": "2026-10-20T18:24:38"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589784501984391168",
        "pages": 1158,
        "sha256": "c7ade1efde79dc98",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atsaml21e18b-mut.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.875
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atsaml21e18b-mut-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.875
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "41a356827c53e3055cc9bfa58499a2d633fe8c7f9ff5855b7660f213f5e81c79",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}