component
ATMEGA8U2-MU
Public Made by Adomby adom
MICROCHIP TECHNOLOGY Global Sourcing Parts, QFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "atmega8u2-mu",
"title": "ATMEGA8U2-MU",
"brief": "MICROCHIP TECHNOLOGY Global Sourcing Parts, QFN-32(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",
"global sourcing parts",
"atmega8u2-mu",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ATMEGA8U2-MU",
"manufacturer": "MICROCHIP TECHNOLOGY",
"package": "QFN-32(5x5)",
"pin_count": 33,
"category": "Global Sourcing Parts",
"subcategory": "Global Sourcing Parts",
"datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/7799S.pdf",
"parts": {
"symbol": "atmega8u2-mu.kicad_sym",
"footprint": "atmega8u2-mu.kicad_mod",
"model_3d": "atmega8u2-mu-hero.glb",
"model_3d_plain": "atmega8u2-mu-etched.glb",
"model_3d_step": "atmega8u2-mu-etched.step",
"model_3d_step_plain": "atmega8u2-mu.step",
"lbr": "atmega8u2-mu.lbr"
},
"distributor_links": {
"lcsc": "C111447",
"digikey": "ATMEGA8U2-MU-ND",
"mouser": "556-ATMEGA8U2-MU"
},
"distributor_check": {
"checked_at": "2026-11-02T17:07:42Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATMEGA8U2-MU-ND",
"status": "found"
},
"mouser": {
"pn": "556-ATMEGA8U2-MU",
"status": "found"
}
},
"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 port pin 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 bi-directional I/O with internal pull-up, alternate functions PCINT11 and AIN2."
},
{
"number": "6",
"name": "PD0",
"type": "bidirectional",
"description": "Port D bit 0 bi-directional I/O with internal pull-up, alternate functions OC.0B and INT0."
},
{
"number": "7",
"name": "PD1",
"type": "bidirectional",
"description": "Port D bit 1 bi-directional I/O with internal pull-up, alternate functions AIN0 (analog comparator input) and INT1."
},
{
"number": "8",
"name": "PD2",
"type": "bidirectional",
"description": "Port D bit 2 bi-directional I/O with internal pull-up, alternate functions RXD1, AIN1 (analog comparator input) and INT2."
},
{
"number": "9",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3 bi-directional I/O with internal pull-up, alternate functions TXD1 and INT3."
},
{
"number": "10",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4 bi-directional I/O with internal pull-up, alternate functions INT5 and AIN3 (analog comparator input)."
},
{
"number": "11",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5 bi-directional I/O with internal pull-up, alternate functions XCK, AIN4 (analog comparator input) and PCINT12."
},
{
"number": "12",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6 bi-directional I/O with internal pull-up, alternate functions RTS, AIN5 (analog comparator input) and INT6."
},
{
"number": "13",
"name": "PD7",
"type": "bidirectional",
"description": "Port D bit 7 bi-directional I/O with internal pull-up, alternate functions CTS, HWB, AIN6 (analog comparator input), T0 and INT7."
},
{
"number": "14",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 bi-directional I/O with internal pull-up, alternate functions SS and PCINT0."
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 bi-directional I/O with internal pull-up, alternate functions SCLK and PCINT1."
},
{
"number": "16",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 bi-directional I/O with internal pull-up, alternate functions PDI, MOSI and PCINT2."
},
{
"number": "17",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 bi-directional I/O with internal pull-up, alternate functions PDO, MISO and PCINT3."
},
{
"number": "18",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 bi-directional I/O with internal pull-up, alternate functions T1 and PCINT4."
},
{
"number": "19",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 bi-directional I/O with internal pull-up, alternate function PCINT5."
},
{
"number": "20",
"name": "PB6",
"type": "bidirectional",
"description": "Port B bit 6 bi-directional I/O with internal pull-up, alternate function PCINT6."
},
{
"number": "21",
"name": "PB7",
"type": "bidirectional",
"description": "Port B bit 7 bi-directional I/O with internal pull-up, alternate functions PCINT7, OC.0A and OC.1C."
},
{
"number": "22",
"name": "PC7",
"type": "bidirectional",
"description": "Port C bit 7 bi-directional I/O with internal pull-up, alternate functions INT4, ICP1 and CLKO."
},
{
"number": "23",
"name": "PC6",
"type": "bidirectional",
"description": "Port C bit 6 bi-directional I/O with internal pull-up, alternate functions OC.1A and PCINT8."
},
{
"number": "24",
"name": "RESET/PC1/dW",
"type": "input",
"description": "Reset input where a low level longer than the minimum pulse length generates a reset even if the clock is not running, alternatively serving as debugWire channel or generic I/O depending on fuses RSTDISBL and DWEN."
},
{
"number": "25",
"name": "PC5",
"type": "bidirectional",
"description": "Port C bit 5 bi-directional I/O with internal pull-up, alternate functions PCINT9 and OC.1B."
},
{
"number": "26",
"name": "PC4",
"type": "bidirectional",
"description": "Port C bit 4 bi-directional I/O with internal pull-up, alternate function PCINT10."
},
{
"number": "27",
"name": "UCAP",
"type": "power_out",
"description": "USB pads internal regulator output supply voltage, to be connected to 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 input for all analog features (analog comparator, PLL), to be externally connected to VCC through a low-pass filter."
},
{
"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-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 large exposed center pad of the QFN32 has no pin number. The datasheet says it should be soldere; The package drawing pages (16-17) contain no extractable text, so the pin-to-number assignment was r",
"exposed pad 33 added from the footprint",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 22,
"cost_usd": 0.1186,
"at": "2026-11-02T17:07:32"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/en/DeviceDoc/7799S.pdf",
"pages": 22,
"sha256": "78639455b8b6b4e8",
"source_tier": "mfr"
},
"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": "atmega8u2-mu.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": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atmega8u2-mu-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": "fbc90c27339205f9e98084cda12b33befd5ca78f447f2a01478bcd99d4d29ec0",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "MICROCHIP TECHNOLOGY",
"Package": "QFN-32(5x5)",
"Category": "Global Sourcing Parts",
"Pins": "33"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"atmega8u2-mu"
],
"discovery_pitch": "ATMEGA8U2-MU (MICROCHIP TECHNOLOGY) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"atmega8u2-mu.kicad_sym",
"atmega8u2-mu.kicad_mod",
"atmega8u2-mu.glb",
"atmega8u2-mu.step",
"atmega8u2-mu.lbr",
"docs/hero.png",
"docs/atmega8u2-mu-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"atmega8u2-mu-hero.glb",
"atmega8u2-mu-hero.overlay.json",
"atmega8u2-mu-etched.glb"
],
"visibility": {
"public": true
}
}