ATMEGA32A-MU

{
  "slug": "atmega32a-mu",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Microcontrollers (MCU/MPU/SOC), VQFN-44(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atmega32a-mu",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atmega32a-mu.kicad_sym",
    "atmega32a-mu.kicad_mod",
    "atmega32a-mu.glb",
    "atmega32a-mu.step",
    "atmega32a-mu.lbr",
    "docs/hero.png",
    "docs/atmega32a-mu-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atmega32a-mu-hero.glb",
    "atmega32a-mu-hero.overlay.json",
    "atmega32a-mu-etched.glb"
  ],
  "component": {
    "mpn": "ATMEGA32A-MU",
    "manufacturer": "Microchip Tech",
    "package": "VQFN-44(7x7)",
    "pin_count": 45,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589012358685732864",
    "parts": {
      "symbol": "atmega32a-mu.kicad_sym",
      "footprint": "atmega32a-mu.kicad_mod",
      "model_3d": "atmega32a-mu-hero.glb",
      "model_3d_plain": "atmega32a-mu-etched.glb",
      "model_3d_step": "atmega32a-mu-etched.step",
      "model_3d_step_plain": "atmega32a-mu.step",
      "lbr": "atmega32a-mu.lbr"
    },
    "distributor_links": {
      "lcsc": "C1337999",
      "digikey": "ATMEGA32A-MU-ND",
      "mouser": "556-ATMEGA32A-MU"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T07:47:36Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA32A-MU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "556-ATMEGA32A-MU",
        "status": "found",
        "lifecycle": "Not Recommended for New Designs"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B bit 5 bi-directional I/O with internal pull-up; alternate function MOSI (SPI master data out / slave data in)."
      },
      {
        "number": "2",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B bit 6 bi-directional I/O with internal pull-up; alternate function MISO (SPI master data in / slave data out)."
      },
      {
        "number": "3",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B bit 7 bi-directional I/O with internal pull-up; alternate function SCK (SPI bus serial clock)."
      },
      {
        "number": "4",
        "name": "RESET",
        "type": "input",
        "description": "Active-low 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 to the internal clock operating circuit."
      },
      {
        "number": "9",
        "name": "PD0",
        "type": "bidirectional",
        "description": "Port D bit 0 bi-directional I/O with internal pull-up; alternate function RXD (USART input)."
      },
      {
        "number": "10",
        "name": "PD1",
        "type": "bidirectional",
        "description": "Port D bit 1 bi-directional I/O with internal pull-up; alternate function TXD (USART output)."
      },
      {
        "number": "11",
        "name": "PD2",
        "type": "bidirectional",
        "description": "Port D bit 2 bi-directional I/O with internal pull-up; alternate function INT0 (external interrupt 0 input)."
      },
      {
        "number": "12",
        "name": "PD3",
        "type": "bidirectional",
        "description": "Port D bit 3 bi-directional I/O with internal pull-up; alternate function INT1 (external interrupt 1 input)."
      },
      {
        "number": "13",
        "name": "PD4",
        "type": "bidirectional",
        "description": "Port D bit 4 bi-directional I/O with internal pull-up; alternate function OC1B (Timer/Counter1 output compare B)."
      },
      {
        "number": "14",
        "name": "PD5",
        "type": "bidirectional",
        "description": "Port D bit 5 bi-directional I/O with internal pull-up; alternate function OC1A (Timer/Counter1 output compare A)."
      },
      {
        "number": "15",
        "name": "PD6",
        "type": "bidirectional",
        "description": "Port D bit 6 bi-directional I/O with internal pull-up; alternate function ICP1 (Timer/Counter1 input capture)."
      },
      {
        "number": "16",
        "name": "PD7",
        "type": "bidirectional",
        "description": "Port D bit 7 bi-directional I/O with internal pull-up; alternate function OC2 (Timer/Counter2 output compare)."
      },
      {
        "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 internal pull-up; alternate function SCL (two-wire serial interface clock)."
      },
      {
        "number": "20",
        "name": "PC1",
        "type": "bidirectional",
        "description": "Port C bit 1 bi-directional I/O with internal pull-up; alternate function SDA (two-wire serial interface data)."
      },
      {
        "number": "21",
        "name": "PC2",
        "type": "bidirectional",
        "description": "Port C bit 2 bi-directional I/O with internal pull-up; alternate function TCK (JTAG test clock), pull-up active during reset when JTAG is enabled."
      },
      {
        "number": "22",
        "name": "PC3",
        "type": "bidirectional",
        "description": "Port C bit 3 bi-directional I/O with internal pull-up; alternate function TMS (JTAG test mode select), pull-up active during reset when JTAG is enabled."
      },
      {
        "number": "23",
        "name": "PC4",
        "type": "bidirectional",
        "description": "Port C bit 4 bi-directional I/O with internal pull-up; alternate function TDO (JTAG test data out), tri-stated unless TAP states shift out data."
      },
      {
        "number": "24",
        "name": "PC5",
        "type": "bidirectional",
        "description": "Port C bit 5 bi-directional I/O with internal pull-up; alternate function TDI (JTAG test data in), pull-up active during reset when JTAG is enabled."
      },
      {
        "number": "25",
        "name": "PC6",
        "type": "bidirectional",
        "description": "Port C bit 6 bi-directional I/O with internal pull-up; alternate function TOSC1 (Timer oscillator input, used when AS2 is set)."
      },
      {
        "number": "26",
        "name": "PC7",
        "type": "bidirectional",
        "description": "Port C bit 7 bi-directional I/O with internal pull-up; alternate function TOSC2 (Timer oscillator output, used when AS2 is set)."
      },
      {
        "number": "27",
        "name": "AVCC",
        "type": "power_in",
        "description": "Supply voltage for Port A and the A/D converter; 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 A/D converter."
      },
      {
        "number": "30",
        "name": "PA7",
        "type": "bidirectional",
        "description": "Port A bit 7 bi-directional I/O with internal pull-up; alternate function ADC7 (ADC input channel 7)."
      },
      {
        "number": "31",
        "name": "PA6",
        "type": "bidirectional",
        "description": "Port A bit 6 bi-directional I/O with internal pull-up; alternate function ADC6 (ADC input channel 6)."
      },
      {
        "number": "32",
        "name": "PA5",
        "type": "bidirectional",
        "description": "Port A bit 5 bi-directional I/O with internal pull-up; alternate function ADC5 (ADC input channel 5)."
      },
      {
        "number": "33",
        "name": "PA4",
        "type": "bidirectional",
        "description": "Port A bit 4 bi-directional I/O with internal pull-up; alternate function ADC4 (ADC input channel 4)."
      },
      {
        "number": "34",
        "name": "PA3",
        "type": "bidirectional",
        "description": "Port A bit 3 bi-directional I/O with internal pull-up; alternate function ADC3 (ADC input channel 3)."
      },
      {
        "number": "35",
        "name": "PA2",
        "type": "bidirectional",
        "description": "Port A bit 2 bi-directional I/O with internal pull-up; alternate function ADC2 (ADC input channel 2)."
      },
      {
        "number": "36",
        "name": "PA1",
        "type": "bidirectional",
        "description": "Port A bit 1 bi-directional I/O with internal pull-up; alternate function ADC1 (ADC input channel 1)."
      },
      {
        "number": "37",
        "name": "PA0",
        "type": "bidirectional",
        "description": "Port A bit 0 bi-directional I/O with internal pull-up; alternate function ADC0 (ADC input channel 0)."
      },
      {
        "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 internal pull-up; alternate functions T0 (Timer/Counter0 external counter input) and XCK (USART external clock)."
      },
      {
        "number": "41",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B bit 1 bi-directional I/O with internal pull-up; alternate function T1 (Timer/Counter1 external counter input)."
      },
      {
        "number": "42",
        "name": "PB2",
        "type": "bidirectional",
        "description": "Port B bit 2 bi-directional I/O with internal pull-up; alternate functions AIN0 (analog comparator positive input) and INT2 (external interrupt 2 input)."
      },
      {
        "number": "43",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B bit 3 bi-directional I/O with internal pull-up; alternate functions AIN1 (analog comparator negative input) and OC0 (Timer/Counter0 output compare)."
      },
      {
        "number": "44",
        "name": "PB4",
        "type": "bidirectional",
        "description": "Port B bit 4 bi-directional I/O with internal pull-up; alternate function SS (SPI slave select input)."
      },
      {
        "number": "45",
        "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 supplied text does not print pin numbers for the 44-pad QFN/MLF package. Figure 1-1 (page 10) is; Package 44M1 (44-pad QFN/MLF 7x7) is confirmed by the ordering information on page 329. The datashee; Pin types and descriptions for tri-state and bidirectional pins follow the alternate-function tables",
          "exposed pad 45 added from the footprint",
          "31/45 pins cited to the wrong page (name found elsewhere): ['7:XTAL2@p13', '8:XTAL1@p13', '15:PD6 (ICP1)@p69', '16:PD7 (OC2)@p68']"
        ],
        "pages_sent": 50,
        "cost_usd": 0.6575,
        "at": "2026-10-19T07:45:02"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589012358685732864",
        "pages": 339,
        "sha256": "a12026626ab84321",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 45,
        "described": 45,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atmega32a-mu.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          7.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e095902326bdaee7dcc9926c9d1613852bfa37bad68a82560157ca7fe509925a",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega32a-mu-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          7.0,
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3f8dd07020dd6eaeff67e5e107f79ae3a0bcf7b7343f078d84884b0e6f857aa8",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}