ATMEGA324PA-AU

{
  "slug": "atmega324pa-au",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Microcontrollers (MCU/MPU/SOC), TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atmega324pa-au",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atmega324pa-au.kicad_sym",
    "atmega324pa-au.kicad_mod",
    "atmega324pa-au.glb",
    "atmega324pa-au.step",
    "atmega324pa-au.lbr",
    "docs/hero.png",
    "docs/atmega324pa-au-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atmega324pa-au-hero.glb",
    "atmega324pa-au-hero.overlay.json",
    "atmega324pa-au-etched.glb"
  ],
  "component": {
    "mpn": "ATMEGA324PA-AU",
    "manufacturer": "Microchip Tech",
    "package": "TQFP-44(10x10)",
    "pin_count": 44,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586181839215714304",
    "parts": {
      "symbol": "atmega324pa-au.kicad_sym",
      "footprint": "atmega324pa-au.kicad_mod",
      "model_3d": "atmega324pa-au-hero.glb",
      "model_3d_plain": "atmega324pa-au-etched.glb",
      "model_3d_step": "atmega324pa-au-etched.step",
      "model_3d_step_plain": "atmega324pa-au.step",
      "lbr": "atmega324pa-au.lbr"
    },
    "distributor_links": {
      "lcsc": "C47751",
      "digikey": "ATMEGA324PA-AU-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T11:00:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA324PA-AU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B bit 5 bi-directional I/O with selectable pull-up; alternate functions MOSI (SPI) and PCINT13."
      },
      {
        "number": "2",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B bit 6 bi-directional I/O with selectable pull-up; alternate functions MISO (SPI) and PCINT14."
      },
      {
        "number": "3",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B bit 7 bi-directional I/O with selectable pull-up; alternate functions SCK (SPI) and PCINT15."
      },
      {
        "number": "4",
        "name": "RESET",
        "type": "input",
        "description": "Reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "7",
        "name": "XTAL2",
        "type": "output",
        "description": "Output from the inverting oscillator amplifier."
      },
      {
        "number": "8",
        "name": "XTAL1",
        "type": "input",
        "description": "Input to the inverting oscillator amplifier and input to the internal clock operating circuit."
      },
      {
        "number": "9",
        "name": "PD0",
        "type": "bidirectional",
        "description": "Port D bit 0 bi-directional I/O with selectable pull-up; alternate functions RXD0 (USART0 receive) and PCINT24."
      },
      {
        "number": "10",
        "name": "PD1",
        "type": "bidirectional",
        "description": "Port D bit 1 bi-directional I/O with selectable pull-up; alternate functions TXD0 (USART0 transmit) and PCINT25."
      },
      {
        "number": "11",
        "name": "PD2",
        "type": "bidirectional",
        "description": "Port D bit 2 bi-directional I/O with selectable pull-up; alternate functions RXD1 (USART1 receive), INT0 and PCINT26."
      },
      {
        "number": "12",
        "name": "PD3",
        "type": "bidirectional",
        "description": "Port D bit 3 bi-directional I/O with selectable pull-up; alternate functions TXD1 (USART1 transmit), INT1 and PCINT27."
      },
      {
        "number": "13",
        "name": "PD4",
        "type": "bidirectional",
        "description": "Port D bit 4 bi-directional I/O with selectable pull-up; alternate functions XCK1, OC1B and PCINT28."
      },
      {
        "number": "14",
        "name": "PD5",
        "type": "bidirectional",
        "description": "Port D bit 5 bi-directional I/O with selectable pull-up; alternate functions OC1A and PCINT29."
      },
      {
        "number": "15",
        "name": "PD6",
        "type": "bidirectional",
        "description": "Port D bit 6 bi-directional I/O with selectable pull-up; alternate functions OC2B, ICP1 and PCINT30."
      },
      {
        "number": "16",
        "name": "PD7",
        "type": "bidirectional",
        "description": "Port D bit 7 bi-directional I/O with selectable pull-up; alternate functions OC2A and PCINT31."
      },
      {
        "number": "17",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "19",
        "name": "PC0",
        "type": "bidirectional",
        "description": "Port C bit 0 bi-directional I/O with selectable pull-up; alternate functions SCL (two-wire serial clock) and PCINT16."
      },
      {
        "number": "20",
        "name": "PC1",
        "type": "bidirectional",
        "description": "Port C bit 1 bi-directional I/O with selectable pull-up; alternate functions SDA (two-wire serial data) and PCINT17."
      },
      {
        "number": "21",
        "name": "PC2",
        "type": "bidirectional",
        "description": "Port C bit 2 bi-directional I/O with selectable pull-up; alternate functions TCK (JTAG test clock) and PCINT18."
      },
      {
        "number": "22",
        "name": "PC3",
        "type": "bidirectional",
        "description": "Port C bit 3 bi-directional I/O with selectable pull-up; alternate functions TMS (JTAG test mode select) and PCINT19."
      },
      {
        "number": "23",
        "name": "PC4",
        "type": "bidirectional",
        "description": "Port C bit 4 bi-directional I/O with selectable pull-up; alternate functions TDO (JTAG test data output) and PCINT20."
      },
      {
        "number": "24",
        "name": "PC5",
        "type": "bidirectional",
        "description": "Port C bit 5 bi-directional I/O with selectable pull-up; alternate functions TDI (JTAG test data input) and PCINT21."
      },
      {
        "number": "25",
        "name": "PC6",
        "type": "bidirectional",
        "description": "Port C bit 6 bi-directional I/O with selectable pull-up; alternate functions TOSC1 (timer oscillator pin 1) and PCINT22."
      },
      {
        "number": "26",
        "name": "PC7",
        "type": "bidirectional",
        "description": "Port C bit 7 bi-directional I/O with selectable pull-up; alternate functions TOSC2 (timer oscillator pin 2) and PCINT23."
      },
      {
        "number": "27",
        "name": "AVCC",
        "type": "power_in",
        "description": "Supply voltage pin for Port A and the ADC; must be connected to VCC even if the ADC is unused, through a low-pass filter if the ADC is used."
      },
      {
        "number": "28",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "29",
        "name": "AREF",
        "type": "input",
        "description": "Analog reference pin for the Analog-to-digital Converter."
      },
      {
        "number": "30",
        "name": "PA7",
        "type": "bidirectional",
        "description": "Port A bit 7 bi-directional I/O with selectable pull-up; ADC input channel 7 and PCINT7."
      },
      {
        "number": "31",
        "name": "PA6",
        "type": "bidirectional",
        "description": "Port A bit 6 bi-directional I/O with selectable pull-up; ADC input channel 6 and PCINT6."
      },
      {
        "number": "32",
        "name": "PA5",
        "type": "bidirectional",
        "description": "Port A bit 5 bi-directional I/O with selectable pull-up; ADC input channel 5 and PCINT5."
      },
      {
        "number": "33",
        "name": "PA4",
        "type": "bidirectional",
        "description": "Port A bit 4 bi-directional I/O with selectable pull-up; ADC input channel 4 and PCINT4."
      },
      {
        "number": "34",
        "name": "PA3",
        "type": "bidirectional",
        "description": "Port A bit 3 bi-directional I/O with selectable pull-up; ADC input channel 3 and PCINT3."
      },
      {
        "number": "35",
        "name": "PA2",
        "type": "bidirectional",
        "description": "Port A bit 2 bi-directional I/O with selectable pull-up; ADC input channel 2 and PCINT2."
      },
      {
        "number": "36",
        "name": "PA1",
        "type": "bidirectional",
        "description": "Port A bit 1 bi-directional I/O with selectable pull-up; ADC input channel 1 and PCINT1."
      },
      {
        "number": "37",
        "name": "PA0",
        "type": "bidirectional",
        "description": "Port A bit 0 bi-directional I/O with selectable pull-up; ADC input channel 0 and PCINT0."
      },
      {
        "number": "38",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "39",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "40",
        "name": "PB0",
        "type": "bidirectional",
        "description": "Port B bit 0 bi-directional I/O with selectable pull-up; alternate functions XCK0, T0 and PCINT8."
      },
      {
        "number": "41",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B bit 1 bi-directional I/O with selectable pull-up; alternate functions T1, CLKO (divided system clock output) and PCINT9."
      },
      {
        "number": "42",
        "name": "PB2",
        "type": "bidirectional",
        "description": "Port B bit 2 bi-directional I/O with selectable pull-up; alternate functions AIN0 (comparator positive input), INT2 and PCINT10."
      },
      {
        "number": "43",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B bit 3 bi-directional I/O with selectable pull-up; alternate functions AIN1 (comparator negative input), OC0A and PCINT11."
      },
      {
        "number": "44",
        "name": "PB4",
        "type": "bidirectional",
        "description": "Port B bit 4 bi-directional I/O with selectable pull-up; alternate functions SS (SPI slave select), OC0B and PCINT12."
      }
    ],
    "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+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet has no separate TQFP pinout. The 44-pin numbering comes from the 'TQFN and QFN' figure; The datasheet does not give an electrical direction for AREF. It is typed as input (analog reference; The VCC pins (5, 17, 38) and GND pins (6, 18, 28, 39) are multiple supply and ground pins.",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 70,
        "cost_usd": 0.8539,
        "at": "2026-10-18T10:58:26"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586181839215714304",
        "pages": 450,
        "sha256": "bf06aad0267aa3f5",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 44,
        "described": 44,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atmega324pa-au.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12.0,
          12.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "61ecec1147f835d2c9d165c450b1c8d53e65b038f6ca1dac3066a2dfb1bbbb85",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega324pa-au-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12.0,
          12.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d34123f141e65739e447550fde905e18edcc29b8c84d8a8c4047646e6fb8a34f",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}