ATMEGA168PA-MU

{
  "slug": "atmega168pa-mu",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech MICROCHIP, VQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atmega168pa-mu",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atmega168pa-mu.kicad_sym",
    "atmega168pa-mu.kicad_mod",
    "atmega168pa-mu.glb",
    "atmega168pa-mu.step",
    "atmega168pa-mu.lbr",
    "docs/hero.png",
    "docs/atmega168pa-mu-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atmega168pa-mu-hero.glb",
    "atmega168pa-mu-hero.overlay.json",
    "atmega168pa-mu-etched.glb"
  ],
  "component": {
    "mpn": "ATMEGA168PA-MU",
    "manufacturer": "Microchip Tech",
    "package": "VQFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "MICROCHIP",
    "datasheet": "https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/Atmel-9223-Automotive-Microcontrollers-ATmega48PA-ATmega88PA-ATmega168PA_Datasheet.pdf",
    "parts": {
      "symbol": "atmega168pa-mu.kicad_sym",
      "footprint": "atmega168pa-mu.kicad_mod",
      "model_3d": "atmega168pa-mu-hero.glb",
      "model_3d_plain": "atmega168pa-mu-etched.glb",
      "model_3d_step": "atmega168pa-mu-etched.step",
      "model_3d_step_plain": "atmega168pa-mu.step",
      "lbr": "atmega168pa-mu.lbr"
    },
    "distributor_links": {
      "lcsc": "C1337182",
      "digikey": "ATMEGA168PA-MU-ND",
      "mouser": "556-ATMEGA168PA-MU"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T06:53:45Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA168PA-MU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "556-ATMEGA168PA-MU",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PD3/INT1/OC2B/PCINT19",
        "type": "bidirectional",
        "description": "Port D bit 3 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving as external interrupt 1 input and OC2B output."
      },
      {
        "number": "2",
        "name": "PD4/XCK/T0/PCINT20",
        "type": "bidirectional",
        "description": "Port D bit 4 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving as USART external clock XCK and Timer/Counter0 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; the operating range is 2.7V to 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; the operating range is 2.7V to 5.5V."
      },
      {
        "number": "7",
        "name": "PB6/XTAL1/TOSC1/PCINT6",
        "type": "bidirectional",
        "description": "Port B bit 6 serves as the chip clock oscillator input XTAL1 or timer oscillator TOSC1 depending on the clock fuse settings, and cannot be used as I/O when used as a clock pin."
      },
      {
        "number": "8",
        "name": "PB7/XTAL2/TOSC2/PCINT7",
        "type": "bidirectional",
        "description": "Port B bit 7 serves as the inverting oscillator amplifier output XTAL2 or timer oscillator TOSC2 depending on the clock fuse settings, and cannot be used as I/O when used as a clock pin."
      },
      {
        "number": "9",
        "name": "PD5/T1/OC0B/PCINT21",
        "type": "bidirectional",
        "description": "Port D bit 5 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving as Timer/Counter1 external counter input T1 and OC0B output."
      },
      {
        "number": "10",
        "name": "PD6/AIN0/OC0A/PCINT22",
        "type": "bidirectional",
        "description": "Port D bit 6 is a bidirectional I/O pin that serves as analog comparator positive input AIN0 (pull-up should be off in that use) and OC0A output."
      },
      {
        "number": "11",
        "name": "PD7/AIN1/PCINT23",
        "type": "bidirectional",
        "description": "Port D bit 7 is a bidirectional I/O pin that serves as analog comparator negative input AIN1 (pull-up should be off in that use)."
      },
      {
        "number": "12",
        "name": "PB0/ICP1/CLKO/PCINT0",
        "type": "bidirectional",
        "description": "Port B bit 0 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving as Timer/Counter1 input capture ICP1 and divided clock output CLKO."
      },
      {
        "number": "13",
        "name": "PB1/OC1A/PCINT1",
        "type": "bidirectional",
        "description": "Port B bit 1 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving as Timer/Counter1 output compare A output OC1A."
      },
      {
        "number": "14",
        "name": "PB2/SS/OC1B/PCINT2",
        "type": "bidirectional",
        "description": "Port B bit 2 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving as SPI slave select SS and Timer/Counter1 output compare B output OC1B."
      },
      {
        "number": "15",
        "name": "PB3/MOSI/OC2A/PCINT3",
        "type": "bidirectional",
        "description": "Port B bit 3 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving as SPI MOSI and Timer/Counter2 output compare A output OC2A."
      },
      {
        "number": "16",
        "name": "PB4/MISO/PCINT4",
        "type": "bidirectional",
        "description": "Port B bit 4 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving as SPI master input/slave output MISO."
      },
      {
        "number": "17",
        "name": "PB5/SCK/PCINT5",
        "type": "bidirectional",
        "description": "Port B bit 5 is a bidirectional I/O pin with internal pull-up that is tri-stated on reset, also serving 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, which should be connected to VCC even if the ADC is not used."
      },
      {
        "number": "19",
        "name": "ADC6",
        "type": "input",
        "description": "Analog input channel 6 of the 10-bit A/D converter, powered from the analog supply (TQFP and QFN package 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 reference for the digital supply."
      },
      {
        "number": "22",
        "name": "ADC7",
        "type": "input",
        "description": "Analog input channel 7 of the 10-bit A/D converter, powered from the analog supply (TQFP and QFN package only)."
      },
      {
        "number": "23",
        "name": "PC0/ADC0/PCINT8",
        "type": "bidirectional",
        "description": "Port C bit 0 is a 7-bit port pin that is tri-stated on reset, also serving as ADC input channel 0 using analog power."
      },
      {
        "number": "24",
        "name": "PC1/ADC1/PCINT9",
        "type": "bidirectional",
        "description": "Port C bit 1 is a port pin that is tri-stated on reset, also serving as ADC input channel 1 using analog power."
      },
      {
        "number": "25",
        "name": "PC2/ADC2/PCINT10",
        "type": "bidirectional",
        "description": "Port C bit 2 is a port pin that is tri-stated on reset, also serving as ADC input channel 2 using analog power."
      },
      {
        "number": "26",
        "name": "PC3/ADC3/PCINT11",
        "type": "bidirectional",
        "description": "Port C bit 3 is a port pin that is tri-stated on reset, also serving as ADC input channel 3 using analog power."
      },
      {
        "number": "27",
        "name": "PC4/ADC4/SDA/PCINT12",
        "type": "bidirectional",
        "description": "Port C bit 4 is a port pin that is tri-stated on reset, also serving as 2-wire serial data SDA and ADC input channel 4 using digital power."
      },
      {
        "number": "28",
        "name": "PC5/ADC5/SCL/PCINT13",
        "type": "bidirectional",
        "description": "Port C bit 5 is a port pin that is tri-stated on reset, also serving as 2-wire serial clock SCL and ADC input channel 5 using digital power."
      },
      {
        "number": "29",
        "name": "PC6/RESET/PCINT14",
        "type": "input",
        "description": "When the RSTDISBL fuse is unprogrammed this pin is an active-low reset input, and a low level longer than the minimum pulse length generates a reset; when programmed it acts as I/O with electrical characteristics differing from other port C pins."
      },
      {
        "number": "30",
        "name": "PD0/RXD/PCINT16",
        "type": "bidirectional",
        "description": "Port D bit 0 is a bidirectional I/O pin that serves as USART receive data input RXD when the USART receiver is enabled."
      },
      {
        "number": "31",
        "name": "PD1/TXD/PCINT17",
        "type": "bidirectional",
        "description": "Port D bit 1 is a bidirectional I/O pin that serves as USART transmit data output TXD and is configured as an output whenever the USART transmitter is enabled."
      },
      {
        "number": "32",
        "name": "PD2/INT0/PCINT18",
        "type": "bidirectional",
        "description": "Port D bit 2 is a bidirectional I/O pin that serves as external interrupt source 0 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 MPN ATMEGA168PA-MU does not appear in the ordering information. The closest listed ordering code; The QFN pin-to-name mapping was read from a figure whose text layer is scrambled. The assignments fo; The datasheet says the bottom exposed pad should be soldered to ground, but it gives no pad number, "
        ],
        "pages_sent": 61,
        "cost_usd": 0.0774,
        "at": "2026-10-27T06:53:26"
      },
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/Atmel-9223-Automotive-Microcontrollers-ATmega48PA-ATmega88PA-ATmega168PA_Datasheet.pdf",
        "pages": 326,
        "sha256": "626d81e6d4d566ae",
        "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": "atmega168pa-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": "atmega168pa-mu-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": "4c27991ec6ec3852d33d49153ffc85616c2ea833c714bcc95ec819c631d94cf5",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}