ATSAMD20E18A-AU

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  "type": "component",
  "slug": "atsamd20e18a-au",
  "title": "ATSAMD20E18A-AU",
  "brief": "Microchip Tech Pre-ordered MCUs, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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    "atsamd20e18a-au",
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  "component": {
    "mpn": "ATSAMD20E18A-AU",
    "manufacturer": "Microchip Tech",
    "package": "TQFP-32(7x7)",
    "pin_count": 32,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Pre-ordered MCUs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/70a692cf8b8dcfe634d1cacc20eac2ef.pdf",
    "parts": {
      "symbol": "atsamd20e18a-au.kicad_sym",
      "footprint": "atsamd20e18a-au.kicad_mod",
      "model_3d": "atsamd20e18a-au-hero.glb",
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      "model_3d_step": "atsamd20e18a-au-etched.step",
      "model_3d_step_plain": "atsamd20e18a-au.step",
      "lbr": "atsamd20e18a-au.lbr"
    },
    "distributor_links": {
      "lcsc": "C618758",
      "digikey": "ATSAMD20E18A-AU-ND",
      "mouser": "556-ATSAMD20E18A-AU"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T00:58:41Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATSAMD20E18A-AU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "556-ATSAMD20E18A-AU",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PA00",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA00 (VDDANA domain) with EXTINT[0], SERCOM1 PAD[0] and TC2 WO[0] peripheral functions, and XIN32 32 kHz crystal input when XOSC32K is used."
      },
      {
        "number": "2",
        "name": "PA01",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA01 (VDDANA domain) with EXTINT[1], SERCOM1 PAD[1] and TC2 WO[1] peripheral functions, and XOUT32 32 kHz crystal output when XOSC32K is used."
      },
      {
        "number": "3",
        "name": "PA02",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA02 (VDDANA domain) with EXTINT[2], analog input AIN[0], PTC Y[0] and DAC output VOUT functions."
      },
      {
        "number": "4",
        "name": "PA03",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA03 (VDDANA domain) with EXTINT[3], ADC/DAC VREFA reference input, and analog input AIN[1] with PTC Y[1]."
      },
      {
        "number": "5",
        "name": "PA04",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA04 (VDDANA domain) with EXTINT[4], ADC VREFB reference input, analog input AIN[4] and AIN[0] with PTC Y[2], SERCOM0 PAD[0] and TC0 WO[0]."
      },
      {
        "number": "6",
        "name": "PA05",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA05 (VDDANA domain) with EXTINT[5], analog inputs AIN[5] and AIN[1] with PTC Y[3], SERCOM0 PAD[1] and TC0 WO[1]."
      },
      {
        "number": "7",
        "name": "PA06",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA06 (VDDANA domain) with EXTINT[6], analog inputs AIN[6] and AIN[2] with PTC Y[4], SERCOM0 PAD[2] and TC1 WO[0]."
      },
      {
        "number": "8",
        "name": "PA07",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA07 (VDDANA domain) with EXTINT[7], analog inputs AIN[7] and AIN[3] with PTC Y[5], SERCOM0 PAD[3] and TC1 WO[1]."
      },
      {
        "number": "9",
        "name": "VDDANA",
        "type": "power_in",
        "description": "Analog supply pin powering the ADC, AC, DAC, PTC and 32 kHz oscillators, with voltage 1.62 V to 3.63 V; VDDIO and VDDANA are internally connected in this package."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the digital power domain."
      },
      {
        "number": "11",
        "name": "PA08",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA08 (VDDIO domain) with I2C, NMI, analog input AIN[16], PTC X[0], SERCOM0 PAD[0], SERCOM2 PAD[0] and TC0 WO[0]."
      },
      {
        "number": "12",
        "name": "PA09",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA09 (VDDIO domain) with I2C, EXTINT[9], analog input AIN[17], PTC X[1], SERCOM0 PAD[1], SERCOM2 PAD[1] and TC0 WO[1]."
      },
      {
        "number": "13",
        "name": "PA10",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA10 (VDDIO domain) with EXTINT[10], analog input AIN[18], PTC X[2], SERCOM0 PAD[2], SERCOM2 PAD[2], TC1 WO[0] and GCLK_IO[4]."
      },
      {
        "number": "14",
        "name": "PA11",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA11 (VDDIO domain) with EXTINT[11], analog input AIN[19], PTC X[3], SERCOM0 PAD[3], SERCOM2 PAD[3], TC1 WO[1] and GCLK_IO[5]."
      },
      {
        "number": "15",
        "name": "PA14",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA14 (VDDIO domain) with EXTINT[14], SERCOM2 PAD[2], SERCOM4 PAD[2], TC3 WO[0] and GCLK_IO[0]; it is also the XIN crystal oscillator input when XOSC is used."
      },
      {
        "number": "16",
        "name": "PA15",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA15 (VDDIO domain) with EXTINT[15], SERCOM2 PAD[3], SERCOM4 PAD[3], TC3 WO[1] and GCLK_IO[1]; it is also the XOUT crystal oscillator output when XOSC is used."
      },
      {
        "number": "17",
        "name": "PA16",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA16 (VDDIO domain) with I2C, EXTINT[0], PTC X[4], SERCOM1 PAD[0], SERCOM3 PAD[0], TC2 WO[0] and GCLK_IO[2]."
      },
      {
        "number": "18",
        "name": "PA17",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA17 (VDDIO domain) with I2C, EXTINT[1], PTC X[5], SERCOM1 PAD[1], SERCOM3 PAD[1], TC2 WO[1] and GCLK_IO[3]."
      },
      {
        "number": "19",
        "name": "PA18",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA18 (VDDIO domain) with EXTINT[2], PTC X[6], SERCOM1 PAD[2], SERCOM3 PAD[2], TC3 WO[0] and AC CMP[0]."
      },
      {
        "number": "20",
        "name": "PA19",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA19 (VDDIO domain) with EXTINT[3], PTC X[7], SERCOM1 PAD[3], SERCOM3 PAD[3], TC3 WO[1] and AC CMP[1]."
      },
      {
        "number": "21",
        "name": "PA22",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA22 (VDDIO domain) with I2C, EXTINT[6], PTC X[10], SERCOM3 PAD[0], SERCOM5 PAD[0], TC4 WO[0] and GCLK_IO[6]."
      },
      {
        "number": "22",
        "name": "PA23",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA23 (VDDIO domain) with I2C, EXTINT[7], PTC X[11], SERCOM3 PAD[1], SERCOM5 PAD[1], TC4 WO[1] and GCLK_IO[7]."
      },
      {
        "number": "23",
        "name": "PA24",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA24 (VDDIO domain) with EXTINT[12], SERCOM3 PAD[2], SERCOM5 PAD[2] and TC5 WO[0]."
      },
      {
        "number": "24",
        "name": "PA25",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA25 (VDDIO domain) with EXTINT[13], SERCOM3 PAD[3], SERCOM5 PAD[3] and TC5 WO[1]."
      },
      {
        "number": "25",
        "name": "PA27",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA27 (VDDIO domain) with EXTINT[15] and GCLK_IO[0]."
      },
      {
        "number": "26",
        "name": "RESET",
        "type": "input",
        "description": "External active-low reset input; the RESET pin has an internal pull-up and its low-level threshold is below 0.33 times VDDIO for 1.6 V to 2.0 V VDDIO or below 0.36 times VDDIO for 2.7 V to 3.6 V VDDIO."
      },
      {
        "number": "27",
        "name": "PA28",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA28 (VDDIO domain) with EXTINT[8] and GCLK_IO[0]."
      },
      {
        "number": "28",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the digital power domain."
      },
      {
        "number": "29",
        "name": "VDDCORE",
        "type": "power_out",
        "description": "Internal regulated core voltage output of 1.2 V that powers the core, memories, peripherals and DFLL48M, decoupled per the schematic checklist."
      },
      {
        "number": "30",
        "name": "VDDIN",
        "type": "power_in",
        "description": "Input supply for I/O lines and the internal voltage regulator, operating from 1.62 V to 3.63 V."
      },
      {
        "number": "31",
        "name": "PA30",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA30 (VDDIO domain) with EXTINT[10], SERCOM1 PAD[2], TC1 WO[0], GCLK_IO[0] and the SWCLK serial wire debug clock function."
      },
      {
        "number": "32",
        "name": "PA31",
        "type": "bidirectional",
        "description": "Port A general-purpose I/O pin PA31 (VDDIO domain) with EXTINT[11], SERCOM1 PAD[3] and TC1 WO[1], and the SWDIO serial wire debug data function active when a debugger is present."
      }
    ],
    "provenance": {
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
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        "cost_usd": 0.0068,
        "at": "2026-10-27T00:57:57"
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        "total": 32,
        "described": 32,
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TQFP-32(7x7)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "32"
    },
    "appearance": {
      "contacts": {
        "quote": "including indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. In the self-capacitance mode, the PTC requires only one pin (Y-line) for each touch sensor.",
        "page": 551,
        "doc": "ds.pdf",
        "plating": "tin"
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          "name": "I/O supply voltage",
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          "max": 3.63,
          "conditions": "Powers I/O lines and the internal regulator",
          "source_page": 27,
          "source": "datasheet"
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          "name": "Analog supply voltage",
          "symbol": "VDDANA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.62,
          "typ": null,
          "max": 3.63,
          "conditions": "Powers I/O lines and ADC, AC, DAC, PTC, OSCULP32K, OSC32K, XOSC32K",
          "source_page": 27,
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        {
          "name": "Operating temperature",
          "symbol": "",
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          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Grade U (-40 to 85 °C) with 1.62V–3.63V, DC up to 48 MHz",
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