ATMEGA8A-MU

{
  "slug": "atmega8a-mu",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech ATMEL & AVR, QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atmega8a-mu",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atmega8a-mu.kicad_sym",
    "atmega8a-mu.kicad_mod",
    "atmega8a-mu.glb",
    "atmega8a-mu.step",
    "atmega8a-mu.lbr",
    "docs/hero.png",
    "docs/atmega8a-mu-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atmega8a-mu-hero.glb",
    "atmega8a-mu-hero.overlay.json",
    "atmega8a-mu-etched.glb"
  ],
  "component": {
    "mpn": "ATMEGA8A-MU",
    "manufacturer": "Microchip Tech",
    "package": "QFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "ATMEL & AVR",
    "datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega8A-Data-Sheet-DS40001974B.pdf",
    "parts": {
      "symbol": "atmega8a-mu.kicad_sym",
      "footprint": "atmega8a-mu.kicad_mod",
      "model_3d": "atmega8a-mu-hero.glb",
      "model_3d_plain": "atmega8a-mu-etched.glb",
      "model_3d_step": "atmega8a-mu-etched.step",
      "model_3d_step_plain": "atmega8a-mu.step",
      "lbr": "atmega8a-mu.lbr"
    },
    "distributor_links": {
      "lcsc": "C68004",
      "digikey": "ATMEGA8A-MU-ND",
      "mouser": "556-ATMEGA8A-MU"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T01:40:01Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA8A-MU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "556-ATMEGA8A-MU",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PD3/INT1",
        "type": "bidirectional",
        "description": "Port D bit 3, a bi-directional I/O with internal pull-up that can also serve as External Interrupt 1 input."
      },
      {
        "number": "2",
        "name": "PD4/XCK/T0",
        "type": "bidirectional",
        "description": "Port D bit 4, a bi-directional I/O with internal pull-up that can also serve as USART external clock XCK or Timer/Counter0 external counter input T0."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the digital supply."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, specified at 2.7 - 5.5V."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the digital supply."
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, specified at 2.7 - 5.5V."
      },
      {
        "number": "7",
        "name": "PB6 (XTAL1/TOSC1)",
        "type": "input",
        "description": "Port B bit 6, used as input to the inverting oscillator amplifier (XTAL1) or as Timer Oscillator pin 1 depending on clock fuse settings."
      },
      {
        "number": "8",
        "name": "PB7 (XTAL2/TOSC2)",
        "type": "output",
        "description": "Port B bit 7, used as output from the inverting oscillator amplifier (XTAL2) or as Timer Oscillator pin 2 depending on clock fuse settings."
      },
      {
        "number": "9",
        "name": "PD5/T1",
        "type": "bidirectional",
        "description": "Port D bit 5, a bi-directional I/O with internal pull-up that can also serve as Timer/Counter1 external counter input T1."
      },
      {
        "number": "10",
        "name": "PD6/AIN0",
        "type": "bidirectional",
        "description": "Port D bit 6, a bi-directional I/O that serves as Analog Comparator positive input AIN0, with the internal pull-up switched off when used as comparator input."
      },
      {
        "number": "11",
        "name": "PD7/AIN1",
        "type": "bidirectional",
        "description": "Port D bit 7, a bi-directional I/O that serves as Analog Comparator negative input AIN1, with the internal pull-up switched off when used as comparator input."
      },
      {
        "number": "12",
        "name": "PB0/ICP1",
        "type": "bidirectional",
        "description": "Port B bit 0, a bi-directional I/O with internal pull-up that can act as Input Capture Pin ICP1 for Timer/Counter1."
      },
      {
        "number": "13",
        "name": "PB1 (OC1A)",
        "type": "bidirectional",
        "description": "Port B bit 1, a bi-directional I/O with internal pull-up that can serve as Timer/Counter1 Output Compare A output OC1A."
      },
      {
        "number": "14",
        "name": "PB2 (SS/OC1B)",
        "type": "bidirectional",
        "description": "Port B bit 2, a bi-directional I/O with internal pull-up that serves as SPI slave select SS or Timer/Counter1 Output Compare B output OC1B."
      },
      {
        "number": "15",
        "name": "PB3 (MOSI/OC2)",
        "type": "bidirectional",
        "description": "Port B bit 3, a bi-directional I/O with internal pull-up that serves as SPI MOSI or Timer/Counter2 Output Compare output OC2."
      },
      {
        "number": "16",
        "name": "PB4 (MISO)",
        "type": "bidirectional",
        "description": "Port B bit 4, a bi-directional I/O with internal pull-up that serves as SPI master input or slave output MISO."
      },
      {
        "number": "17",
        "name": "PB5 (SCK)",
        "type": "bidirectional",
        "description": "Port B bit 5, a bi-directional I/O with internal pull-up that serves as SPI clock SCK."
      },
      {
        "number": "18",
        "name": "AVCC",
        "type": "power_in",
        "description": "Supply voltage pin for the A/D converter and ADC channels 6 and 7, to be connected to VCC even when the ADC is not used."
      },
      {
        "number": "19",
        "name": "ADC6",
        "type": "passive",
        "description": "ADC analog input channel 6, available only in the TQFP and VQFN packages and powered from the analog supply."
      },
      {
        "number": "20",
        "name": "AREF",
        "type": "passive",
        "description": "Analog reference pin for the A/D converter."
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the digital supply."
      },
      {
        "number": "22",
        "name": "ADC7",
        "type": "passive",
        "description": "ADC analog input channel 7, available only in the TQFP and VQFN packages and powered from the analog supply."
      },
      {
        "number": "23",
        "name": "PC0 (ADC0)",
        "type": "bidirectional",
        "description": "Port C bit 0, a bi-directional I/O with internal pull-up that can also serve as ADC input channel 0 using analog power."
      },
      {
        "number": "24",
        "name": "PC1 (ADC1)",
        "type": "bidirectional",
        "description": "Port C bit 1, a bi-directional I/O with internal pull-up that can also serve as ADC input channel 1 using analog power."
      },
      {
        "number": "25",
        "name": "PC2 (ADC2)",
        "type": "bidirectional",
        "description": "Port C bit 2, a bi-directional I/O with internal pull-up that can also serve as ADC input channel 2 using analog power."
      },
      {
        "number": "26",
        "name": "PC3 (ADC3)",
        "type": "bidirectional",
        "description": "Port C bit 3, a bi-directional I/O with internal pull-up that can also serve as ADC input channel 3 using analog power."
      },
      {
        "number": "27",
        "name": "PC4 (SDA/ADC4)",
        "type": "bidirectional",
        "description": "Port C bit 4, a bi-directional I/O with internal pull-up that serves as Two-wire Serial Data SDA or ADC input channel 4 using digital power."
      },
      {
        "number": "28",
        "name": "PC5 (SCL/ADC5)",
        "type": "bidirectional",
        "description": "Port C bit 5, a bi-directional I/O with internal pull-up that serves as Two-wire Serial Clock SCL or ADC input channel 5 using digital power."
      },
      {
        "number": "29",
        "name": "PC6 (RESET)",
        "type": "input",
        "description": "Reset input when the RSTDISBL fuse is unprogrammed; a low level longer than the minimum pulse length generates a reset, otherwise it is a normal I/O pin with different electrical characteristics."
      },
      {
        "number": "30",
        "name": "PD0 (RXD)",
        "type": "bidirectional",
        "description": "Port D bit 0, a bi-directional I/O with internal pull-up that serves as USART receive data input RXD when the receiver is enabled."
      },
      {
        "number": "31",
        "name": "PD1 (TXD)",
        "type": "bidirectional",
        "description": "Port D bit 1, a bi-directional I/O with internal pull-up that serves as USART transmit data output TXD when the transmitter is enabled."
      },
      {
        "number": "32",
        "name": "PD2 (INT0)",
        "type": "bidirectional",
        "description": "Port D bit 2, a bi-directional I/O with internal pull-up that can serve as External Interrupt 0 input INT0."
      },
      {
        "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: The exposed center pad under the VQFN package is not given a numbered pin in the datasheet, so it is",
          "19/33 pins cited to the wrong page (name found elsewhere): ['8:PB7 (XTAL2/TOSC2)@p63', '12:PB0/ICP1@p64', '14:PB2 (SS/OC1B)@p64', '15:PB3 (MOSI/OC2)@p64']"
        ],
        "pages_sent": 76,
        "cost_usd": 0.0874,
        "at": "2026-10-27T01:39:30"
      },
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega8A-Data-Sheet-DS40001974B.pdf",
        "pages": 327,
        "sha256": "e10f0e392857e034",
        "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": "atmega8a-mu.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": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega8a-mu-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": "32add82135ace6f74a575404aa4e3b85cbef00848dc8c5fea95677edf7b4f531",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}