ATMEGA1281-16AU

{
  "slug": "atmega1281-16au",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech ATMEL & AVR, TQFP-64(14x14). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atmega1281-16au",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atmega1281-16au.kicad_sym",
    "atmega1281-16au.kicad_mod",
    "atmega1281-16au.glb",
    "atmega1281-16au.step",
    "atmega1281-16au.lbr",
    "docs/hero.png",
    "docs/atmega1281-16au-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atmega1281-16au-hero.glb",
    "atmega1281-16au-hero.overlay.json",
    "atmega1281-16au-etched.glb"
  ],
  "component": {
    "mpn": "ATMEGA1281-16AU",
    "manufacturer": "Microchip Tech",
    "package": "TQFP-64(14x14)",
    "pin_count": 64,
    "category": "Embedded Processors & Controllers",
    "subcategory": "ATMEL & AVR",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/28f3b91906f1fc2ee07724b231a08f97.pdf",
    "parts": {
      "symbol": "atmega1281-16au.kicad_sym",
      "footprint": "atmega1281-16au.kicad_mod",
      "model_3d": "atmega1281-16au-hero.glb",
      "model_3d_plain": "atmega1281-16au-etched.glb",
      "model_3d_step": "atmega1281-16au-etched.step",
      "model_3d_step_plain": "atmega1281-16au.step",
      "lbr": "atmega1281-16au.lbr"
    },
    "distributor_links": {
      "lcsc": "C39168",
      "digikey": "ATMEGA1281-16AU-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T22:15:21Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA1281-16AU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PG5",
        "type": "bidirectional",
        "description": "Port G bit 5, I/O with selectable internal pull-up; alternate function OC0B."
      },
      {
        "number": "2",
        "name": "PE0",
        "type": "bidirectional",
        "description": "Port E bit 0, I/O with selectable internal pull-up; alternate functions RXD0/PCINT8/PDI."
      },
      {
        "number": "3",
        "name": "PE1",
        "type": "bidirectional",
        "description": "Port E bit 1, I/O with selectable internal pull-up; alternate functions TXD0/PDO."
      },
      {
        "number": "4",
        "name": "PE2",
        "type": "bidirectional",
        "description": "Port E bit 2, I/O with selectable internal pull-up; alternate functions XCK0/AIN0."
      },
      {
        "number": "5",
        "name": "PE3",
        "type": "bidirectional",
        "description": "Port E bit 3, I/O with selectable internal pull-up; alternate functions OC3A/AIN1."
      },
      {
        "number": "6",
        "name": "PE4",
        "type": "bidirectional",
        "description": "Port E bit 4, I/O with selectable internal pull-up; alternate functions OC3B/INT4."
      },
      {
        "number": "7",
        "name": "PE5",
        "type": "bidirectional",
        "description": "Port E bit 5, I/O with selectable internal pull-up; alternate functions OC3C/INT5."
      },
      {
        "number": "8",
        "name": "PE6",
        "type": "bidirectional",
        "description": "Port E bit 6, I/O with selectable internal pull-up; alternate functions T3/INT6."
      },
      {
        "number": "9",
        "name": "PE7",
        "type": "bidirectional",
        "description": "Port E bit 7, I/O with selectable internal pull-up; alternate functions ICP3/CLKO/INT7."
      },
      {
        "number": "10",
        "name": "PB0",
        "type": "bidirectional",
        "description": "Port B bit 0, I/O with selectable internal pull-up and higher drive capability than other ports; alternate functions SS/PCINT0."
      },
      {
        "number": "11",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B bit 1, I/O with selectable internal pull-up and higher drive capability than other ports; alternate functions SCK/PCINT1."
      },
      {
        "number": "12",
        "name": "PB2",
        "type": "bidirectional",
        "description": "Port B bit 2, I/O with selectable internal pull-up and higher drive capability than other ports; alternate functions MOSI/PCINT2."
      },
      {
        "number": "13",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B bit 3, I/O with selectable internal pull-up and higher drive capability than other ports; alternate functions MISO/PCINT3."
      },
      {
        "number": "14",
        "name": "PB4",
        "type": "bidirectional",
        "description": "Port B bit 4, I/O with selectable internal pull-up and higher drive capability than other ports; alternate functions OC2A/PCINT4."
      },
      {
        "number": "15",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B bit 5, I/O with selectable internal pull-up and higher drive capability than other ports; alternate functions OC1A/PCINT5."
      },
      {
        "number": "16",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B bit 6, I/O with selectable internal pull-up and higher drive capability than other ports; alternate functions OC1B/PCINT6."
      },
      {
        "number": "17",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B bit 7, I/O with selectable internal pull-up and higher drive capability than other ports; alternate functions OC0A/OC1C/PCINT7."
      },
      {
        "number": "18",
        "name": "PG3",
        "type": "bidirectional",
        "description": "Port G bit 3, I/O with selectable internal pull-up; alternate function TOSC2."
      },
      {
        "number": "19",
        "name": "PG4",
        "type": "bidirectional",
        "description": "Port G bit 4, I/O with selectable internal pull-up; alternate function TOSC1."
      },
      {
        "number": "20",
        "name": "RESET",
        "type": "input",
        "description": "Reset input pin (shown on the pinout figure; its description is not in the provided pages)."
      },
      {
        "number": "21",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "22",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "23",
        "name": "XTAL2",
        "type": "output",
        "description": "Crystal oscillator amplifier output pin (description not in the provided pages)."
      },
      {
        "number": "24",
        "name": "XTAL1",
        "type": "input",
        "description": "Crystal oscillator amplifier / external clock input pin (description not in the provided pages)."
      },
      {
        "number": "25",
        "name": "PD0",
        "type": "bidirectional",
        "description": "Port D bit 0, I/O with selectable internal pull-up; alternate functions SCL/INT0."
      },
      {
        "number": "26",
        "name": "PD1",
        "type": "bidirectional",
        "description": "Port D bit 1, I/O with selectable internal pull-up; alternate functions SDA/INT1."
      },
      {
        "number": "27",
        "name": "PD2",
        "type": "bidirectional",
        "description": "Port D bit 2, I/O with selectable internal pull-up; alternate functions RXD1/INT2."
      },
      {
        "number": "28",
        "name": "PD3",
        "type": "bidirectional",
        "description": "Port D bit 3, I/O with selectable internal pull-up; alternate functions TXD1/INT3."
      },
      {
        "number": "29",
        "name": "PD4",
        "type": "bidirectional",
        "description": "Port D bit 4, I/O with selectable internal pull-up; alternate function ICP1."
      },
      {
        "number": "30",
        "name": "PD5",
        "type": "bidirectional",
        "description": "Port D bit 5, I/O with selectable internal pull-up; alternate function XCK1."
      },
      {
        "number": "31",
        "name": "PD6",
        "type": "bidirectional",
        "description": "Port D bit 6, I/O with selectable internal pull-up; alternate function T1."
      },
      {
        "number": "32",
        "name": "PD7",
        "type": "bidirectional",
        "description": "Port D bit 7, I/O with selectable internal pull-up; alternate function T0."
      },
      {
        "number": "33",
        "name": "PG0",
        "type": "bidirectional",
        "description": "Port G bit 0, I/O with selectable internal pull-up; alternate function WR."
      },
      {
        "number": "34",
        "name": "PG1",
        "type": "bidirectional",
        "description": "Port G bit 1, I/O with selectable internal pull-up; alternate function RD."
      },
      {
        "number": "35",
        "name": "PC0",
        "type": "bidirectional",
        "description": "Port C bit 0, I/O with selectable internal pull-up; alternate function A8."
      },
      {
        "number": "36",
        "name": "PC1",
        "type": "bidirectional",
        "description": "Port C bit 1, I/O with selectable internal pull-up; alternate function A9."
      },
      {
        "number": "37",
        "name": "PC2",
        "type": "bidirectional",
        "description": "Port C bit 2, I/O with selectable internal pull-up; alternate function A10."
      },
      {
        "number": "38",
        "name": "PC3",
        "type": "bidirectional",
        "description": "Port C bit 3, I/O with selectable internal pull-up; alternate function A11."
      },
      {
        "number": "39",
        "name": "PC4",
        "type": "bidirectional",
        "description": "Port C bit 4, I/O with selectable internal pull-up; alternate function A12."
      },
      {
        "number": "40",
        "name": "PC5",
        "type": "bidirectional",
        "description": "Port C bit 5, I/O with selectable internal pull-up; alternate function A13."
      },
      {
        "number": "41",
        "name": "PC6",
        "type": "bidirectional",
        "description": "Port C bit 6, I/O with selectable internal pull-up; alternate function A14."
      },
      {
        "number": "42",
        "name": "PC7",
        "type": "bidirectional",
        "description": "Port C bit 7, I/O with selectable internal pull-up; alternate function A15."
      },
      {
        "number": "43",
        "name": "PG2",
        "type": "bidirectional",
        "description": "Port G bit 2, I/O with selectable internal pull-up; alternate function ALE."
      },
      {
        "number": "44",
        "name": "PA7",
        "type": "bidirectional",
        "description": "Port A bit 7, I/O with selectable internal pull-up; alternate function AD7."
      },
      {
        "number": "45",
        "name": "PA6",
        "type": "bidirectional",
        "description": "Port A bit 6, I/O with selectable internal pull-up; alternate function AD6."
      },
      {
        "number": "46",
        "name": "PA5",
        "type": "bidirectional",
        "description": "Port A bit 5, I/O with selectable internal pull-up; alternate function AD5."
      },
      {
        "number": "47",
        "name": "PA4",
        "type": "bidirectional",
        "description": "Port A bit 4, I/O with selectable internal pull-up; alternate function AD4."
      },
      {
        "number": "48",
        "name": "PA3",
        "type": "bidirectional",
        "description": "Port A bit 3, I/O with selectable internal pull-up; alternate function AD3."
      },
      {
        "number": "49",
        "name": "PA2",
        "type": "bidirectional",
        "description": "Port A bit 2, I/O with selectable internal pull-up; alternate function AD2."
      },
      {
        "number": "50",
        "name": "PA1",
        "type": "bidirectional",
        "description": "Port A bit 1, I/O with selectable internal pull-up; alternate function AD1."
      },
      {
        "number": "51",
        "name": "PA0",
        "type": "bidirectional",
        "description": "Port A bit 0, I/O with selectable internal pull-up; alternate function AD0."
      },
      {
        "number": "52",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "53",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "54",
        "name": "PF7",
        "type": "bidirectional",
        "description": "Port F bit 7, analog input to the A/D Converter (ADC7) or I/O; JTAG TDI, pull-up active when JTAG is enabled even during reset."
      },
      {
        "number": "55",
        "name": "PF6",
        "type": "bidirectional",
        "description": "Port F bit 6, analog input to the A/D Converter (ADC6) or I/O; JTAG TDO."
      },
      {
        "number": "56",
        "name": "PF5",
        "type": "bidirectional",
        "description": "Port F bit 5, analog input to the A/D Converter (ADC5) or I/O; JTAG TMS, pull-up active when JTAG is enabled even during reset."
      },
      {
        "number": "57",
        "name": "PF4",
        "type": "bidirectional",
        "description": "Port F bit 4, analog input to the A/D Converter (ADC4) or I/O; JTAG TCK, pull-up active when JTAG is enabled even during reset."
      },
      {
        "number": "58",
        "name": "PF3",
        "type": "bidirectional",
        "description": "Port F bit 3, analog input to the A/D Converter (ADC3) or I/O."
      },
      {
        "number": "59",
        "name": "PF2",
        "type": "bidirectional",
        "description": "Port F bit 2, analog input to the A/D Converter (ADC2) or I/O."
      },
      {
        "number": "60",
        "name": "PF1",
        "type": "bidirectional",
        "description": "Port F bit 1, analog input to the A/D Converter (ADC1) or I/O."
      },
      {
        "number": "61",
        "name": "PF0",
        "type": "bidirectional",
        "description": "Port F bit 0, analog input to the A/D Converter (ADC0) or I/O."
      },
      {
        "number": "62",
        "name": "AREF",
        "type": "input",
        "description": "Analog reference pin for the A/D Converter (description not in the provided pages)."
      },
      {
        "number": "63",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "64",
        "name": "AVCC",
        "type": "power_in",
        "description": "Supply voltage pin for the A/D Converter (description not in the provided pages)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The extracted text of Figure 1-3 lists pin names without printed pin numbers, and the same figure co; Descriptions for RESET, XTAL1, XTAL2, AREF and AVCC are not in the provided pages (the pin descripti; The Port F JTAG details come from the Port F description. Port A, B, C, D, E and G alternate functio",
          "14/64 pins cited to the wrong page (name found elsewhere): ['21:VCC@p7', '22:GND@p7', '23:XTAL2@p4', '24:XTAL1@p4']"
        ],
        "pages_sent": 18,
        "cost_usd": 0.2403,
        "at": "2026-10-22T22:14:48"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/28f3b91906f1fc2ee07724b231a08f97.pdf",
        "pages": 34,
        "sha256": "8ee216d27cb2f273",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atmega1281-16au.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          16.0,
          16.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ba925bf5c4254d55a029c50945e4157a8371aaac29d2dc73cee8d71f59249e8c",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega1281-16au-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "aed3c1d07cc998882ff5c08bc1d652ae8449dc746f0aab8c9a737fde41f67f27",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}