ATMEGA8A-AU

{
  "schema_version": 1,
  "type": "component",
  "slug": "atmega8a-au",
  "title": "ATMEGA8A-AU",
  "brief": "Microchip Microcontrollers (MCU/MPU/SOC), TQFP-32(7x7). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "mcu",
    "atmega8a-au"
  ],
  "component": {
    "mpn": "ATMEGA8A-AU",
    "manufacturer": "Microchip",
    "package": "TQFP-32(7x7)",
    "pin_count": 32,
    "category": "MCU",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/79449d677655458abca6aa017c0be8e3.pdf",
    "parts": {
      "symbol": "atmega8a-au.kicad_sym",
      "footprint": "atmega8a-au.kicad_mod",
      "model_3d": "atmega8a-au-etched.glb",
      "model_3d_plain": "atmega8a-au.glb",
      "model_3d_step": "atmega8a-au-etched.step",
      "model_3d_step_plain": "atmega8a-au.step",
      "lbr": "atmega8a-au.lbr"
    },
    "distributor_links": {
      "digikey": "ATMEGA8A-AU-ND",
      "lcsc": "C16190"
    },
    "pins": [
      {
        "number": "1",
        "name": "PD3/INT1",
        "type": "bidirectional",
        "description": "Port D bit 3, bi-directional I/O with programmable internal pull-up. Alternate function: INT1 external interrupt input."
      },
      {
        "number": "2",
        "name": "PD4/XCK/T0",
        "type": "bidirectional",
        "description": "Port D bit 4, bi-directional I/O with programmable internal pull-up. Alternates: USART external clock (XCK) and Timer/Counter0 external clock input (T0)."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground reference (0V)."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, 2.7-5.5V."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground reference (0V)."
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, 2.7-5.5V."
      },
      {
        "number": "7",
        "name": "PB6/XTAL1/TOSC1",
        "type": "bidirectional",
        "description": "Port B bit 6, bi-directional I/O with internal pull-up. Alternates: XTAL1 crystal oscillator input (and internal clock circuit input); TOSC1 asynchronous Timer/Counter2 oscillator input when AS2 bit set."
      },
      {
        "number": "8",
        "name": "PB7/XTAL2/TOSC2",
        "type": "bidirectional",
        "description": "Port B bit 7, bi-directional I/O with internal pull-up. Alternates: XTAL2 crystal oscillator output (inverting amplifier); TOSC2 asynchronous Timer/Counter2 oscillator when AS2 bit set."
      },
      {
        "number": "9",
        "name": "PD5/T1",
        "type": "bidirectional",
        "description": "Port D bit 5, bi-directional I/O with internal pull-up. Alternate: Timer/Counter1 external clock input (T1)."
      },
      {
        "number": "10",
        "name": "PD6/AIN0",
        "type": "bidirectional",
        "description": "Port D bit 6, bi-directional I/O with internal pull-up. Alternate: analog comparator positive input (AIN0)."
      },
      {
        "number": "11",
        "name": "PD7/AIN1",
        "type": "bidirectional",
        "description": "Port D bit 7, bi-directional I/O with internal pull-up. Alternate: analog comparator negative input (AIN1)."
      },
      {
        "number": "12",
        "name": "PB0/ICP1",
        "type": "bidirectional",
        "description": "Port B bit 0, bi-directional I/O with internal pull-up. Alternate: Timer/Counter1 input capture (ICP1)."
      },
      {
        "number": "13",
        "name": "PB1/OC1A",
        "type": "bidirectional",
        "description": "Port B bit 1, bi-directional I/O with internal pull-up. Alternate: Timer/Counter1 output compare A (OC1A) PWM output."
      },
      {
        "number": "14",
        "name": "PB2/SS/OC1B",
        "type": "bidirectional",
        "description": "Port B bit 2, bi-directional I/O with internal pull-up. Alternates: SPI slave select (SS, active low); Timer/Counter1 output compare B (OC1B) PWM output."
      },
      {
        "number": "15",
        "name": "PB3/MOSI/OC2",
        "type": "bidirectional",
        "description": "Port B bit 3, bi-directional I/O with internal pull-up. Alternates: SPI Master Out / Slave In data (MOSI, also used for ISP programming); Timer/Counter2 output compare (OC2) PWM output."
      },
      {
        "number": "16",
        "name": "PB4/MISO",
        "type": "bidirectional",
        "description": "Port B bit 4, bi-directional I/O with internal pull-up. Alternate: SPI Master In / Slave Out data (MISO, also used for ISP programming readback)."
      },
      {
        "number": "17",
        "name": "PB5/SCK",
        "type": "bidirectional",
        "description": "Port B bit 5, bi-directional I/O with internal pull-up. Alternate: SPI serial clock (SCK, also used for ISP programming)."
      },
      {
        "number": "18",
        "name": "AVCC",
        "type": "power_in",
        "description": "Analog supply voltage for the A/D Converter, Port C[3:0], and ADC[7:6]. Must be connected externally to VCC (through low-pass filter if ADC is used)."
      },
      {
        "number": "19",
        "name": "ADC6",
        "type": "input",
        "description": "Dedicated analog input channel 6 to the 10-bit ADC (TQFP/QFN only). Powered from analog supply (AVCC)."
      },
      {
        "number": "20",
        "name": "AREF",
        "type": "passive",
        "description": "Analog reference input for the A/D Converter. Typically decoupled with capacitor to AGND."
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Analog ground reference (0V); shared/tied to digital GND."
      },
      {
        "number": "22",
        "name": "ADC7",
        "type": "input",
        "description": "Dedicated analog input channel 7 to the 10-bit ADC (TQFP/QFN only). Powered from analog supply (AVCC)."
      },
      {
        "number": "23",
        "name": "PC0/ADC0",
        "type": "bidirectional",
        "description": "Port C bit 0, bi-directional I/O with internal pull-up. Alternate: ADC channel 0 analog input."
      },
      {
        "number": "24",
        "name": "PC1/ADC1",
        "type": "bidirectional",
        "description": "Port C bit 1, bi-directional I/O with internal pull-up. Alternate: ADC channel 1 analog input."
      },
      {
        "number": "25",
        "name": "PC2/ADC2",
        "type": "bidirectional",
        "description": "Port C bit 2, bi-directional I/O with internal pull-up. Alternate: ADC channel 2 analog input."
      },
      {
        "number": "26",
        "name": "PC3/ADC3",
        "type": "bidirectional",
        "description": "Port C bit 3, bi-directional I/O with internal pull-up. Alternate: ADC channel 3 analog input."
      },
      {
        "number": "27",
        "name": "PC4/ADC4/SDA",
        "type": "bidirectional",
        "description": "Port C bit 4, bi-directional I/O with internal pull-up. Alternates: ADC channel 4 analog input; TWI (I2C-compatible) serial data (SDA) - open-drain when TWEN set."
      },
      {
        "number": "28",
        "name": "PC5/ADC5/SCL",
        "type": "bidirectional",
        "description": "Port C bit 5, bi-directional I/O with internal pull-up. Alternates: ADC channel 5 analog input; TWI (I2C-compatible) serial clock (SCL) - open-drain when TWEN set."
      },
      {
        "number": "29",
        "name": "PC6/RESET",
        "type": "input",
        "description": "Reset input (active low) by default; a low level longer than the minimum pulse length generates a reset even when the clock is not running. If the RSTDISBL fuse is programmed, PC6 becomes a general-purpose I/O with reduced drive."
      },
      {
        "number": "30",
        "name": "PD0/RXD",
        "type": "bidirectional",
        "description": "Port D bit 0, bi-directional I/O with internal pull-up. Alternate: USART receive data input (RXD)."
      },
      {
        "number": "31",
        "name": "PD1/TXD",
        "type": "bidirectional",
        "description": "Port D bit 1, bi-directional I/O with internal pull-up. Alternate: USART transmit data output (TXD)."
      },
      {
        "number": "32",
        "name": "PD2/INT0",
        "type": "bidirectional",
        "description": "Port D bit 2, bi-directional I/O with internal pull-up. Alternate: INT0 external interrupt input."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/79449d677655458abca6aa017c0be8e3.pdf",
        "pages": 13,
        "sha256": "95842cde9bc8cdd0",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 32,
        "described": 32,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -4.175,
        -2.8
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "LQFP-32_7x7mm_P0.8mm@sha256:d3a8db080529cbea",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "atmega8a-au.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.0,
          9.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "be0e412f1c66fee70039b0e109e0cc7c823161dda97593718afa97569bc61ce3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega8a-au-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.0,
          9.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e29f68d63c4cd249b12d4f856c26686b636744bdb1c9cfb1523f820d021382fa",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip",
      "Package": "TQFP-32(7x7)",
      "Category": "MCU",
      "Pins": "32"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "atmega8a-au"
  ],
  "discovery_pitch": "ATMEGA8A-AU (Microchip) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atmega8a-au.kicad_sym",
    "atmega8a-au.kicad_mod",
    "atmega8a-au.glb",
    "atmega8a-au.step",
    "atmega8a-au-etched.step",
    "atmega8a-au.lbr",
    "docs/hero.png",
    "docs/atmega8a-au-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:18:26.762Z"
}