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Ray Set visibility: public 376bcd2 7d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "atmega16u2-mur",
  "title": "ATMEGA16U2-MUR",
  "brief": "Microchip Tech Microcontrollers (MCU/MPU/SOC), QFN-32-EP(5x5). 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",
    "atmega16u2-mur",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ATMEGA16U2-MUR",
    "manufacturer": "Microchip Tech",
    "package": "QFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913540790407168",
    "parts": {
      "symbol": "atmega16u2-mur.kicad_sym",
      "footprint": "atmega16u2-mur.kicad_mod",
      "model_3d": "atmega16u2-mur-hero.glb",
      "model_3d_plain": "atmega16u2-mur-etched.glb",
      "model_3d_step": "atmega16u2-mur-etched.step",
      "model_3d_step_plain": "atmega16u2-mur.step",
      "lbr": "atmega16u2-mur.lbr"
    },
    "distributor_links": {
      "lcsc": "C507117",
      "digikey": "ATMEGA16U2-MURTR-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T11:34:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA16U2-MURTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "XTAL1",
        "type": "input",
        "description": "Input to the inverting oscillator amplifier and input to the internal clock operating circuit."
      },
      {
        "number": "2",
        "name": "XTAL2/PC0",
        "type": "bidirectional",
        "description": "Output from the inverting oscillator amplifier if enabled by fuse; also serves as generic I/O PC0."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "5",
        "name": "PC2",
        "type": "bidirectional",
        "description": "Port C bit 2 I/O with internal pull-up; alternate functions PCINT11 and AIN2."
      },
      {
        "number": "6",
        "name": "PD0",
        "type": "bidirectional",
        "description": "Port D bit 0 I/O with internal pull-up; alternate functions INT0 and OC0B."
      },
      {
        "number": "7",
        "name": "PD1",
        "type": "bidirectional",
        "description": "Port D bit 1 I/O with internal pull-up; alternate functions INT1 and AIN0 (analog comparator positive input)."
      },
      {
        "number": "8",
        "name": "PD2",
        "type": "bidirectional",
        "description": "Port D bit 2 I/O with internal pull-up; alternate functions INT2, AIN1 (analog comparator negative input) and RXD1."
      },
      {
        "number": "9",
        "name": "PD3",
        "type": "bidirectional",
        "description": "Port D bit 3 I/O with internal pull-up; alternate functions INT3 and TXD1."
      },
      {
        "number": "10",
        "name": "PD4",
        "type": "bidirectional",
        "description": "Port D bit 4 I/O with internal pull-up; alternate function INT5 (AIN3 per pinout)."
      },
      {
        "number": "11",
        "name": "PD5",
        "type": "bidirectional",
        "description": "Port D bit 5 I/O with internal pull-up; alternate functions XCK1 (USART1 external clock), AIN4 and PCINT12."
      },
      {
        "number": "12",
        "name": "PD6",
        "type": "bidirectional",
        "description": "Port D bit 6 I/O with internal pull-up; alternate functions INT6, AIN5 and RTS (USART1 receiver flow control)."
      },
      {
        "number": "13",
        "name": "PD7",
        "type": "bidirectional",
        "description": "Port D bit 7 I/O with internal pull-up; alternate functions HWB (hardware boot), T0, INT7, AIN6 and CTS."
      },
      {
        "number": "14",
        "name": "PB0",
        "type": "bidirectional",
        "description": "Port B bit 0 I/O with internal pull-up; SPI slave select SS and PCINT0."
      },
      {
        "number": "15",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B bit 1 I/O with internal pull-up; SPI clock SCLK and PCINT1."
      },
      {
        "number": "16",
        "name": "PB2",
        "type": "bidirectional",
        "description": "Port B bit 2 I/O with internal pull-up; MOSI/PDI and PCINT2."
      },
      {
        "number": "17",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B bit 3 I/O with internal pull-up; MISO/PDO and PCINT3."
      },
      {
        "number": "18",
        "name": "PB4",
        "type": "bidirectional",
        "description": "Port B bit 4 I/O with internal pull-up; T1 and PCINT4."
      },
      {
        "number": "19",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B bit 5 I/O with internal pull-up; PCINT5."
      },
      {
        "number": "20",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B bit 6 I/O with internal pull-up; PCINT6."
      },
      {
        "number": "21",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B bit 7 I/O with internal pull-up; OC0A, OC1C and PCINT7."
      },
      {
        "number": "22",
        "name": "PC7",
        "type": "bidirectional",
        "description": "Port C bit 7 I/O with internal pull-up; ICP1, INT4 and CLKO clock output."
      },
      {
        "number": "23",
        "name": "PC6",
        "type": "bidirectional",
        "description": "Port C bit 6 I/O with internal pull-up; PCINT8 and OC1A."
      },
      {
        "number": "24",
        "name": "RESET/PC1/dW",
        "type": "bidirectional",
        "description": "Active-low reset input (low longer than minimum pulse length generates a reset); alternatively debugWire channel or generic I/O depending on RSTDISBL and DWEN fuses."
      },
      {
        "number": "25",
        "name": "PC5",
        "type": "bidirectional",
        "description": "Port C bit 5 I/O with internal pull-up; PCINT9 and OC1B."
      },
      {
        "number": "26",
        "name": "PC4",
        "type": "bidirectional",
        "description": "Port C bit 4 I/O with internal pull-up; PCINT10."
      },
      {
        "number": "27",
        "name": "UCAP",
        "type": "passive",
        "description": "USB pads internal regulator output supply voltage; connect an external 1 µF capacitor."
      },
      {
        "number": "28",
        "name": "UGND",
        "type": "power_in",
        "description": "USB ground."
      },
      {
        "number": "29",
        "name": "D+",
        "type": "bidirectional",
        "description": "USB full speed positive data upstream port."
      },
      {
        "number": "30",
        "name": "D-",
        "type": "bidirectional",
        "description": "USB full speed negative data upstream port."
      },
      {
        "number": "31",
        "name": "UVCC",
        "type": "power_in",
        "description": "USB pads internal regulator input supply voltage."
      },
      {
        "number": "32",
        "name": "AVCC",
        "type": "power_in",
        "description": "Supply voltage for analog features (analog comparator, PLL); should be externally connected to VCC through a low-pass filter."
      },
      {
        "number": "33",
        "name": "EP",
        "type": "power_in",
        "description": "Large center pad underneath the QFN package; should be soldered to ground on the board for mechanical stability."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The center pad has no pin number in the datasheet. I labelled it EP and numbered it 33.; PD4 shows AIN3 in the pinout figure, but the Port D alternate function table lists only INT5.; The datasheet says the Port B/C/D drive buffers are symmetrical, but it gives no pin types for D+ an",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 44,
        "cost_usd": 0.5973,
        "at": "2026-10-18T11:32:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913540790407168",
        "pages": 310,
        "sha256": "182d44b383463202",
        "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": "atmega16u2-mur.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          5,
          0.875
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega16u2-mur-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          5,
          0.875
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9fbb40f264dee9ef259e64f84161abffc18ee321cbc65da5f3567f57023c95cf",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-32-EP(5x5)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "33"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "182d44b3834632028e2258ee410b3ad33ee89c692695b6dc3e68cbdd08a5d03a",
      "rows": [
        {
          "name": "Operating Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Maximum Operating Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Voltage on RESET with respect to Ground",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 13,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Voltage on UVcc with respect to Ground",
          "symbol": "UVcc",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "DC Current per I/O Pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "DC Current VCC and GND Pins",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 5.5,
          "conditions": "Operating voltage range",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature (industrial)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Industrial range",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Maximum Frequency",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "VCC = 2.7V, industrial range",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Maximum Frequency",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": null,
          "typ": null,
          "max": 16,
          "conditions": "VCC = 4.5V, industrial range",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Input Low Voltage, Standard IOs",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 0.8,
          "conditions": "VCC = 2.7V - 5.5V",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Input High Voltage, Standard IOs",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "VCC = 2.7V - 5.5V",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Output Low Voltage, Standard IOs, MOSI/MISO pins",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.7,
          "conditions": "IOL = 10mA, VCC = 5V",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Output Low Voltage, Standard IOs, MOSI/MISO pins",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "IOL = 5mA, VCC = 3V",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Output High Voltage, Standard IOs, MOSI/MISO pins",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.2,
          "typ": null,
          "max": null,
          "conditions": "IOH = -10mA, VCC = 5V",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Output High Voltage, Standard IOs, MOSI/MISO pins",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.3,
          "typ": null,
          "max": null,
          "conditions": "IOH = -5mA, VCC = 3V",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Input Leakage Current I/O Pin",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VCC = 5.5V, pin low (absolute value)",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "Reset Pull-up Resistor",
          "symbol": "RRST",
          "kind": "electrical",
          "unit": "k",
          "min": 30,
          "typ": null,
          "max": 60,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "I/O Pin Pull-up Resistor",
          "symbol": "RPU",
          "kind": "electrical",
          "unit": "k",
          "min": 20,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 264,
          "source": "datasheet"
        },
        {
          "name": "USB D+ Internal Pull-Up",
          "symbol": "RPUDP",
          "kind": "electrical",
          "unit": "",
          "min": 900,
          "typ": null,
          "max": 1500,
          "conditions": "Idle mode",
          "source_page": 265,
          "source": "datasheet"
        },
        {
          "name": "USB D+ Internal Pull-Up",
          "symbol": "RPUDP",
          "kind": "electrical",
          "unit": "",
          "min": 1425,
          "typ": null,
          "max": 3090,
          "conditions": "Streaming mode",
          "source_page": 265,
          "source": "datasheet"
        },
        {
          "name": "USB Series resistor (external)",
          "symbol": "Rusb",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "External; nominal 22 (unit not printed)",
          "source_page": 265,
          "source": "datasheet"
        },
        {
          "name": "Regulator Output Voltage",
          "symbol": "Vreg",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "Vcc4.0V, I100mA, CUCAP=1μF±20%",
          "source_page": 265,
          "source": "datasheet"
        },
        {
          "name": "UVcc (USB pads regulator input supply)",
          "symbol": "UVcc",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 265,
          "source": "datasheet"
        },
        {
          "name": "Analog Comparator Input Offset Voltage",
          "symbol": "VACIO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
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