ATMEGA328P-MUR

{
  "slug": "atmega328p-mur",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Microcontrollers (MCU/MPU/SOC), VQFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atmega328p-mur",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atmega328p-mur.kicad_sym",
    "atmega328p-mur.kicad_mod",
    "atmega328p-mur.glb",
    "atmega328p-mur.step",
    "atmega328p-mur.lbr",
    "docs/hero.png",
    "docs/atmega328p-mur-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atmega328p-mur-hero.glb",
    "atmega328p-mur-hero.overlay.json",
    "atmega328p-mur-etched.glb"
  ],
  "component": {
    "mpn": "ATMEGA328P-MUR",
    "manufacturer": "Microchip Tech",
    "package": "VQFN-32(5x5)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930969491681280",
    "parts": {
      "symbol": "atmega328p-mur.kicad_sym",
      "footprint": "atmega328p-mur.kicad_mod",
      "model_3d": "atmega328p-mur-hero.glb",
      "model_3d_plain": "atmega328p-mur-etched.glb",
      "model_3d_step": "atmega328p-mur-etched.step",
      "model_3d_step_plain": "atmega328p-mur.step",
      "lbr": "atmega328p-mur.lbr"
    },
    "distributor_links": {
      "lcsc": "C2651951",
      "digikey": "ATMEGA328P-MURTR-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T16:11:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA328P-MURTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PD3",
        "type": "bidirectional",
        "description": "Port D bit 3 is a bidirectional I/O with internal pull-up; it can also serve as external interrupt INT1 and as the Timer/Counter2 OC2B output, which requires the pin to be configured as an output."
      },
      {
        "number": "2",
        "name": "PD4",
        "type": "bidirectional",
        "description": "Port D bit 4 is a bidirectional I/O with internal pull-up; it can also serve as the USART external clock XCK and Timer/Counter0 external counter input T0."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, 1.8 to 5.5 V operating range."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, 1.8 to 5.5 V operating range."
      },
      {
        "number": "7",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B bit 6 is used as the XTAL1 chip-clock oscillator input or external clock input, in which case the pin cannot be used as I/O; otherwise it is a bidirectional I/O with internal pull-up."
      },
      {
        "number": "8",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B bit 7 is used as the XTAL2 chip-clock oscillator output when a crystal is used, in which case the pin cannot be used as I/O; otherwise it is a bidirectional I/O with internal pull-up."
      },
      {
        "number": "9",
        "name": "PD5",
        "type": "bidirectional",
        "description": "Port D bit 5 is a bidirectional I/O with internal pull-up; it can also serve as Timer/Counter1 external counter input T1 and Timer/Counter0 OC0B output."
      },
      {
        "number": "10",
        "name": "PD6",
        "type": "bidirectional",
        "description": "Port D bit 6 is a bidirectional I/O with internal pull-up; as AIN0 it is the Analog Comparator positive input, for which the pull-up should be switched off."
      },
      {
        "number": "11",
        "name": "PD7",
        "type": "bidirectional",
        "description": "Port D bit 7 is a bidirectional I/O with internal pull-up; as AIN1 it is the Analog Comparator negative input, for which the pull-up should be switched off."
      },
      {
        "number": "12",
        "name": "PB0",
        "type": "bidirectional",
        "description": "Port B bit 0 is a bidirectional I/O with internal pull-up; it can also serve as Timer/Counter1 input capture ICP1 or divided system clock output CLKO."
      },
      {
        "number": "13",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B bit 1 is a bidirectional I/O with internal pull-up; it can also serve as Timer/Counter1 output OC1A, which requires the pin to be configured as an output."
      },
      {
        "number": "14",
        "name": "PB2",
        "type": "bidirectional",
        "description": "Port B bit 2 is a bidirectional I/O with internal pull-up; it can also serve as SPI slave select SS or Timer/Counter1 output OC1B."
      },
      {
        "number": "15",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B bit 3 is a bidirectional I/O with internal pull-up; it can also serve as SPI MOSI or Timer/Counter2 output OC2A."
      },
      {
        "number": "16",
        "name": "PB4",
        "type": "bidirectional",
        "description": "Port B bit 4 is a bidirectional I/O with internal pull-up; it can also serve as SPI MISO data line."
      },
      {
        "number": "17",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B bit 5 is a bidirectional I/O with internal pull-up; it can also serve as SPI clock SCK."
      },
      {
        "number": "18",
        "name": "AVCC",
        "type": "power_in",
        "description": "Supply voltage pin for the A/D Converter, PC3:0 and ADC7:6; it should be connected to VCC even if the ADC is not used, and through a low-pass filter if the ADC is used."
      },
      {
        "number": "19",
        "name": "ADC6",
        "type": "input",
        "description": "Analog input channel 6 of the 10-bit ADC, powered from the analog supply (TQFP and VQFN packages only)."
      },
      {
        "number": "20",
        "name": "AREF",
        "type": "input",
        "description": "Analog reference pin for the A/D Converter."
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "22",
        "name": "ADC7",
        "type": "input",
        "description": "Analog input channel 7 of the 10-bit ADC, powered from the analog supply (TQFP and VQFN packages only)."
      },
      {
        "number": "23",
        "name": "PC0 (ADC0/PCINT8)",
        "type": "bidirectional",
        "description": "Port C bit 0 is a bidirectional I/O with internal pull-up and serves as ADC input channel 0, which uses analog power; it can also serve as pin change interrupt PCINT8."
      },
      {
        "number": "24",
        "name": "PC1 (ADC1/PCINT9)",
        "type": "bidirectional",
        "description": "Port C bit 1 is a bidirectional I/O with internal pull-up and serves as ADC input channel 1, which uses analog power; it can also serve as pin change interrupt PCINT9."
      },
      {
        "number": "25",
        "name": "PC2 (ADC2/PCINT10)",
        "type": "bidirectional",
        "description": "Port C bit 2 is a bidirectional I/O with internal pull-up and serves as ADC input channel 2, which uses analog power; it can also serve as pin change interrupt PCINT10."
      },
      {
        "number": "26",
        "name": "PC3 (ADC3/PCINT11)",
        "type": "bidirectional",
        "description": "Port C bit 3 is a bidirectional I/O with internal pull-up and serves as ADC input channel 3, which uses analog power; it can also serve as pin change interrupt PCINT11."
      },
      {
        "number": "27",
        "name": "PC4 (ADC4/SDA/PCINT12)",
        "type": "bidirectional",
        "description": "Port C bit 4 is a bidirectional I/O with internal pull-up; as ADC4 it uses digital power, and when the 2-wire interface is enabled it is the SDA serial data line (open-drain, with spike filter)."
      },
      {
        "number": "28",
        "name": "PC5 (ADC5/SCL/PCINT13)",
        "type": "bidirectional",
        "description": "Port C bit 5 is a bidirectional I/O with internal pull-up; as ADC5 it uses digital power, and when the 2-wire interface is enabled it is the SCL serial clock line (open-drain, with spike filter)."
      },
      {
        "number": "29",
        "name": "PC6 (RESET/PCINT14)",
        "type": "input",
        "description": "Active-low Reset input when the RSTDISBL fuse is unprogrammed, where a low level longer than the minimum pulse length generates a reset; if RSTDISBL is programmed it operates as a normal I/O pin with different electrical characteristics."
      },
      {
        "number": "30",
        "name": "PD0 (RXD/PCINT16)",
        "type": "bidirectional",
        "description": "Port D bit 0 is a bidirectional I/O with internal pull-up; it is the USART receive data input RXD when the USART receiver is enabled, and can also serve as pin change interrupt PCINT16."
      },
      {
        "number": "31",
        "name": "PD1 (TXD/PCINT17)",
        "type": "bidirectional",
        "description": "Port D bit 1 is a bidirectional I/O with internal pull-up; it is the USART transmit data output TXD when the USART transmitter is enabled, and can also serve as pin change interrupt PCINT17."
      },
      {
        "number": "32",
        "name": "PD2 (INT0/PCINT18)",
        "type": "bidirectional",
        "description": "Port D bit 2 is a bidirectional I/O with internal pull-up; it can also serve as external interrupt source INT0 and pin change interrupt PCINT18."
      },
      {
        "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 package-variant pin numbers were not preserved as text in the extracted datasheet. The 32-pad VQ; Package confirmed: ATmega328P-MU / -MUR is the 32-pad 5x5 mm VQFN (32M1-A) per the ordering informat; The exposed bottom pad is not given a pin number in the datasheet. The datasheet only notes 'Bottom ",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 126,
        "cost_usd": 0.4062,
        "at": "2026-10-18T16:10:33"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930969491681280",
        "pages": 653,
        "sha256": "7699c7d2d6d12492",
        "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": "atmega328p-mur.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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega328p-mur-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": "28fcc29cc21e6e9b60450083803a30362c8a3794295fe87b38726dae37c942e1",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}