ATMEGA32-16AU

{
  "schema_version": 1,
  "type": "component",
  "slug": "atmega32-16au",
  "title": "ATMEGA32-16AU",
  "brief": "Microchip Tech Microcontrollers (MCU/MPU/SOC), TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atmega32-16au",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ATMEGA32-16AU",
    "manufacturer": "Microchip Tech",
    "package": "TQFP-44(10x10)",
    "pin_count": 44,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586181406536454144",
    "parts": {
      "symbol": "atmega32-16au.kicad_sym",
      "footprint": "atmega32-16au.kicad_mod",
      "model_3d": "atmega32-16au-hero.glb",
      "model_3d_plain": "atmega32-16au-etched.glb",
      "model_3d_step": "atmega32-16au-etched.step",
      "model_3d_step_plain": "atmega32-16au.step",
      "lbr": "atmega32-16au.lbr"
    },
    "distributor_links": {
      "lcsc": "C8724",
      "digikey": "ATMEGA32-16AU-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T20:54:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA32-16AU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B bit 5 is a bidirectional I/O pin with internal pull-up, and serves as SPI MOSI (master data output / slave data input) when SPI is enabled."
      },
      {
        "number": "2",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B bit 6 is a bidirectional I/O pin with internal pull-up, and serves as SPI MISO (master data input / slave data output) when SPI is enabled."
      },
      {
        "number": "3",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B bit 7 is a bidirectional I/O pin with internal pull-up, and serves as SPI clock (master clock output / slave clock input) when SPI is enabled."
      },
      {
        "number": "4",
        "name": "RESET",
        "type": "input",
        "description": "Active-low reset input; a low level longer than the minimum pulse length (Table 15, p.37) generates a reset even if the clock is not running."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, 4.5 - 5.5V for ATmega32 (2.7 - 5.5V for ATmega32L)."
      },
      {
        "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 is a bidirectional I/O pin with internal pull-up, and serves as USART receive data input (RXD) when the receiver is enabled."
      },
      {
        "number": "10",
        "name": "PD1",
        "type": "bidirectional",
        "description": "Port D bit 1 is a bidirectional I/O pin with internal pull-up, and serves as USART transmit data output (TXD) when the transmitter is enabled."
      },
      {
        "number": "11",
        "name": "PD2",
        "type": "bidirectional",
        "description": "Port D bit 2 is a bidirectional I/O pin with internal pull-up, and serves as external interrupt source 0 (INT0)."
      },
      {
        "number": "12",
        "name": "PD3",
        "type": "bidirectional",
        "description": "Port D bit 3 is a bidirectional I/O pin with internal pull-up, and serves as external interrupt source 1 (INT1)."
      },
      {
        "number": "13",
        "name": "PD4",
        "type": "bidirectional",
        "description": "Port D bit 4 is a bidirectional I/O pin with internal pull-up, and serves as Timer/Counter1 output compare B match output (OC1B)."
      },
      {
        "number": "14",
        "name": "PD5",
        "type": "bidirectional",
        "description": "Port D bit 5 is a bidirectional I/O pin with internal pull-up, and serves as Timer/Counter1 output compare A match output (OC1A)."
      },
      {
        "number": "15",
        "name": "PD6",
        "type": "bidirectional",
        "description": "Port D bit 6 is a bidirectional I/O pin with internal pull-up, and serves as Timer/Counter1 input capture pin (ICP1)."
      },
      {
        "number": "16",
        "name": "PD7 (OC2)",
        "type": "bidirectional",
        "description": "Port D bit 7 is a bidirectional I/O pin with internal pull-up, and serves as Timer/Counter2 output compare match output (OC2)."
      },
      {
        "number": "17",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, 4.5 - 5.5V for ATmega32 (2.7 - 5.5V for ATmega32L)."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "19",
        "name": "PC0 (SCL)",
        "type": "bidirectional",
        "description": "Port C bit 0 is a bidirectional I/O pin with internal pull-up, and serves as Two-wire Serial Interface clock line (SCL) when TWEN is set."
      },
      {
        "number": "20",
        "name": "PC1 (SDA)",
        "type": "bidirectional",
        "description": "Port C bit 1 is a bidirectional I/O pin with internal pull-up, and serves as Two-wire Serial Interface data line (SDA) when TWEN is set."
      },
      {
        "number": "21",
        "name": "PC2 (TCK)",
        "type": "bidirectional",
        "description": "Port C bit 2 is a bidirectional I/O pin with internal pull-up, and serves as JTAG test clock (TCK) when the JTAG interface is enabled, in which case it cannot be used as I/O."
      },
      {
        "number": "22",
        "name": "PC3 (TMS)",
        "type": "bidirectional",
        "description": "Port C bit 3 is a bidirectional I/O pin with internal pull-up, and serves as JTAG test mode select (TMS) when the JTAG interface is enabled, in which case it cannot be used as I/O."
      },
      {
        "number": "23",
        "name": "PC4 (TDO)",
        "type": "tri_state",
        "description": "Port C bit 4 serves as JTAG test data output (TDO) when the JTAG interface is enabled; the TDO pin is tri-stated unless TAP states that shift out data are entered."
      },
      {
        "number": "24",
        "name": "PC5 (TDI)",
        "type": "bidirectional",
        "description": "Port C bit 5 is a bidirectional I/O pin with internal pull-up, and serves as JTAG test data input (TDI) when the JTAG interface is enabled, with the pull-up active even during reset."
      },
      {
        "number": "25",
        "name": "PC6 (TOSC1)",
        "type": "bidirectional",
        "description": "Port C bit 6 is a bidirectional I/O pin, and serves as input to the inverting Timer Oscillator amplifier (TOSC1) when asynchronous Timer/Counter2 clocking is enabled."
      },
      {
        "number": "26",
        "name": "PC7 (TOSC2)",
        "type": "bidirectional",
        "description": "Port C bit 7 is a bidirectional I/O pin, and serves as inverting output of the Timer Oscillator amplifier (TOSC2) when asynchronous Timer/Counter2 clocking is enabled."
      },
      {
        "number": "27",
        "name": "AVCC",
        "type": "power_in",
        "description": "Supply voltage pin for Port A and the A/D Converter; 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": "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 (ADC7)",
        "type": "bidirectional",
        "description": "Port A bit 7 serves as ADC analog input channel 7, or as a bidirectional I/O pin with internal pull-up when the ADC is not used; pins are tri-stated on reset."
      },
      {
        "number": "31",
        "name": "PA6 (ADC6)",
        "type": "bidirectional",
        "description": "Port A bit 6 serves as ADC analog input channel 6, or as a bidirectional I/O pin with internal pull-up when the ADC is not used; pins are tri-stated on reset."
      },
      {
        "number": "32",
        "name": "PA5 (ADC5)",
        "type": "bidirectional",
        "description": "Port A bit 5 serves as ADC analog input channel 5, or as a bidirectional I/O pin with internal pull-up when the ADC is not used; pins are tri-stated on reset."
      },
      {
        "number": "33",
        "name": "PA4 (ADC4)",
        "type": "bidirectional",
        "description": "Port A bit 4 serves as ADC analog input channel 4, or as a bidirectional I/O pin with internal pull-up when the ADC is not used; pins are tri-stated on reset."
      },
      {
        "number": "34",
        "name": "PA3 (ADC3)",
        "type": "bidirectional",
        "description": "Port A bit 3 serves as ADC analog input channel 3, or as a bidirectional I/O pin with internal pull-up when the ADC is not used; pins are tri-stated on reset."
      },
      {
        "number": "35",
        "name": "PA2 (ADC2)",
        "type": "bidirectional",
        "description": "Port A bit 2 serves as ADC analog input channel 2, or as a bidirectional I/O pin with internal pull-up when the ADC is not used; pins are tri-stated on reset."
      },
      {
        "number": "36",
        "name": "PA1 (ADC1)",
        "type": "bidirectional",
        "description": "Port A bit 1 serves as ADC analog input channel 1, or as a bidirectional I/O pin with internal pull-up when the ADC is not used; pins are tri-stated on reset."
      },
      {
        "number": "37",
        "name": "PA0 (ADC0)",
        "type": "bidirectional",
        "description": "Port A bit 0 serves as ADC analog input channel 0, or as a bidirectional I/O pin with internal pull-up when the ADC is not used; pins are tri-stated on reset."
      },
      {
        "number": "38",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage, 4.5 - 5.5V for ATmega32 (2.7 - 5.5V for ATmega32L)."
      },
      {
        "number": "39",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "40",
        "name": "PB0 (XCK/T0)",
        "type": "bidirectional",
        "description": "Port B bit 0 is a bidirectional I/O pin with internal pull-up, and serves as Timer/Counter0 external counter input (T0) and USART external clock (XCK)."
      },
      {
        "number": "41",
        "name": "PB1 (T1)",
        "type": "bidirectional",
        "description": "Port B bit 1 is a bidirectional I/O pin with internal pull-up, and serves as Timer/Counter1 external counter input (T1)."
      },
      {
        "number": "42",
        "name": "PB2 (AIN0/INT2)",
        "type": "bidirectional",
        "description": "Port B bit 2 is a bidirectional I/O pin with internal pull-up, and serves as Analog Comparator positive input (AIN0) and external interrupt source 2 (INT2); pull-up should be switched off when used as AIN0."
      },
      {
        "number": "43",
        "name": "PB3 (AIN1/OC0)",
        "type": "bidirectional",
        "description": "Port B bit 3 is a bidirectional I/O pin with internal pull-up, and serves as Analog Comparator negative input (AIN1) and Timer/Counter0 output compare match output (OC0); pull-up should be switched off when used as AIN1."
      },
      {
        "number": "44",
        "name": "PB4 (SS)",
        "type": "bidirectional",
        "description": "Port B bit 4 is a bidirectional I/O pin with internal pull-up, and serves as SPI slave select input (SS); when SPI is a slave, the pin is always an input."
      }
    ],
    "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 extracted text of Figure 1 (p.2) lists the TQFP/MLF labels without printed pin numbers. Numbers ; PC4-PC7 are shown as port pins with JTAG/timer-oscillator alternate functions; their type is listed ; AREF type set to input (analog reference input); the datasheet describes it only as the analog refer",
          "38/44 pins cited to the wrong page (name found elsewhere): ['1:PB5 (MOSI)@p5', '2:PB6 (MISO)@p5', '7:XTAL2@p5', '8:XTAL1@p5']"
        ],
        "pages_sent": 50,
        "cost_usd": 0.6127,
        "at": "2026-10-18T20:51:57"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586181406536454144",
        "pages": 347,
        "sha256": "96f068da63286072",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 44,
        "described": 44,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atmega32-16au.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12,
          12,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "61ecec1147f835d2c9d165c450b1c8d53e65b038f6ca1dac3066a2dfb1bbbb85",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega32-16au-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e3665f47a5d7b2e9bba152d27ecd6d389e1368edbcec90606a1caa2579ea6b09",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TQFP-44(10x10)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "44"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "96f068da63286072b1a943dac6b79034ae7bd79aa852d7397d8f2f425445bb9a",
      "rows": [
        {
          "name": "Reset Pull-up Resistor",
          "symbol": "RRST",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 30,
          "typ": null,
          "max": 60,
          "conditions": "",
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        },
        {
          "name": "I/O Pin Pull-up Resistor",
          "symbol": "Rpu",
          "kind": "electrical",
          "unit": "kΩ",
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          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Input Leakage Current I/O Pin (absolute value)",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
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          "source_page": 287,
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        },
        {
          "name": "Output Low Voltage (Ports A,B,C,D)",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.7,
          "conditions": "IOL = 20 mA, VCC = 5V",
          "source_page": 287,
          "source": "datasheet"
        },
        {
          "name": "Output High Voltage (Ports A,B,C,D)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.2,
          "typ": null,
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          "source_page": 287,
          "source": "datasheet"
        },
        {
          "name": "Input Low Voltage (except XTAL1 and RESET pins)",
          "symbol": "VIL",
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          "min": -0.5,
          "typ": null,
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        },
        {
          "name": "Input Low Voltage XTAL1 pin",
          "symbol": "VIL1",
          "kind": "electrical",
          "unit": "V",
          "min": -0.5,
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          "max": null,
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        },
        {
          "name": "Input Low Voltage RESET pin",
          "symbol": "VIL2",
          "kind": "electrical",
          "unit": "V",
          "min": -0.5,
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          "source": "datasheet"
        },
        {
          "name": "Analog Comparator Input Leakage Current",
          "symbol": "IACLK",
          "kind": "electrical",
          "unit": "nA",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "VCC = 5V, Vin = VCC/2",
          "source_page": 288,
          "source": "datasheet"
        },
        {
          "name": "Analog Comparator Input Offset Voltage",
          "symbol": "VACIO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "VCC = 5V, Vin = VCC/2",
          "source_page": 288,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Current Active",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 12,
          "max": 15,
          "conditions": "Active 8 MHz, VCC = 5V (ATmega32)",
          "source_page": 288,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Current Idle",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5.5,
          "max": 8,
          "conditions": "Idle 8 MHz, VCC = 5V (ATmega32)",
          "source_page": 288,
          "source": "datasheet"
        },
        {
          "name": "Absolute Maximum Operating Temperature",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 287,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 287,
          "source": "datasheet"
        },
        {
          "name": "Voltage on any pin except RESET with respect to Ground",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "with respect to ground; upper limit printed as VCC+0.5V",
          "source_page": 287,
          "source": "datasheet"
        },
        {
          "name": "Voltage on RESET with respect to Ground",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
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          "typ": null,
          "max": 13,
          "conditions": "with respect to ground",
          "source_page": 287,
          "source": "datasheet"
        },
        {
          "name": "Maximum Operating Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "DC Current per I/O Pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
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        },
        {
          "name": "DC Current VCC and GND Pins",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "TQFP/MLF package (PDIP: 200.0 mA)",
          "source_page": 287,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (ATmega32, 5 V variant)",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 5.5,
          "conditions": "ATmega32 (not ATmega32L); speed grade 16 MHz",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "1/tCLCL",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 0,
          "typ": null,
          "max": 16,
          "conditions": "VCC = 4.5V to 5.5V",
          "source_page": 289,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature (Industrial)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Industrial grade (AU suffix)",
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        },
        {
          "name": "Power-on Reset Threshold Voltage (rising)",
          "symbol": "VPOT",
          "kind": "electrical",
          "unit": "V",
          "min": 1.4,
          "typ": null,
          "max": 2.3,
          "conditions": "",
          "source_page": 37,
          "source": "datasheet"
        },
        {
          "name": "Power-on Reset Threshold Voltage (falling)",
          "symbol": "VPOT",
          "kind": "electrical",
          "unit": "V",
          "min": 1.3,
          "typ": null,
          "max": 2.3,
          "conditions": "",
          "source_page": 37,
          "source": "datasheet"
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