component
ATMEGA32U2-MUR
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, VQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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{
"schema_version": 1,
"type": "component",
"slug": "atmega32u2-mur",
"title": "ATMEGA32U2-MUR",
"brief": "Microchip Tech Pre-ordered MCUs, VQFN-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",
"atmega32u2-mur",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ATMEGA32U2-MUR",
"manufacturer": "Microchip Tech",
"package": "VQFN-32-EP(5x5)",
"pin_count": 33,
"category": "Embedded Processors & Controllers",
"subcategory": "Pre-ordered MCUs",
"datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/7799S.pdf",
"parts": {
"symbol": "atmega32u2-mur.kicad_sym",
"footprint": "atmega32u2-mur.kicad_mod",
"model_3d": "atmega32u2-mur-hero.glb",
"model_3d_plain": "atmega32u2-mur-etched.glb",
"model_3d_step": "atmega32u2-mur-etched.step",
"model_3d_step_plain": "atmega32u2-mur.step",
"lbr": "atmega32u2-mur.lbr"
},
"distributor_links": {
"lcsc": "C1337625",
"digikey": "ATMEGA32U2-MURTR-ND",
"mouser": "556-ATMEGA32U2-MUR"
},
"distributor_check": {
"checked_at": "2026-10-23T12:08:11Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATMEGA32U2-MURTR-ND",
"status": "found"
},
"mouser": {
"pn": "556-ATMEGA32U2-MUR",
"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 a 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 with internal pull-up; alternate functions PCINT11 and AIN2."
},
{
"number": "6",
"name": "PD0",
"type": "bidirectional",
"description": "Port D bit 0 with internal pull-up; alternate functions OC.0B and INT0."
},
{
"number": "7",
"name": "PD1",
"type": "bidirectional",
"description": "Port D bit 1 with internal pull-up; alternate functions AIN0 and INT1."
},
{
"number": "8",
"name": "PD2",
"type": "bidirectional",
"description": "Port D bit 2 with internal pull-up; alternate functions RXD1, AIN1 and INT2."
},
{
"number": "9",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3 with internal pull-up; alternate functions TXD1 and INT3."
},
{
"number": "10",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4 with internal pull-up; alternate functions INT5 and AIN3."
},
{
"number": "11",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5 with internal pull-up; alternate functions XCK, AIN4 and PCINT12."
},
{
"number": "12",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6 with internal pull-up; alternate functions RTS, AIN5 and INT6."
},
{
"number": "13",
"name": "PD7",
"type": "bidirectional",
"description": "Port D bit 7 with internal pull-up; alternate functions CTS, HWB, AIN6, T0 and INT7."
},
{
"number": "14",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 with internal pull-up; alternate functions SS and PCINT0."
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 with internal pull-up; alternate functions SCLK and PCINT1."
},
{
"number": "16",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 with internal pull-up; alternate functions PDI, MOSI and PCINT2."
},
{
"number": "17",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 with internal pull-up; alternate functions PDO, MISO and PCINT3."
},
{
"number": "18",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 with internal pull-up; alternate functions T1 and PCINT4."
},
{
"number": "19",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 with internal pull-up; alternate function PCINT5."
},
{
"number": "20",
"name": "PB6",
"type": "bidirectional",
"description": "Port B bit 6 with internal pull-up; alternate function PCINT6."
},
{
"number": "21",
"name": "PB7",
"type": "bidirectional",
"description": "Port B bit 7 with internal pull-up; alternate functions PCINT7, OC.0A and OC.1C."
},
{
"number": "22",
"name": "PC7",
"type": "bidirectional",
"description": "Port C bit 7 with internal pull-up; alternate functions INT4, ICP1 and CLKO."
},
{
"number": "23",
"name": "PC6",
"type": "bidirectional",
"description": "Port C bit 6 with internal pull-up; alternate functions OC.1A and PCINT8."
},
{
"number": "24",
"name": "RESET/PC1/dW",
"type": "input",
"description": "Reset input, active low for longer than the minimum pulse length; alternatively debugWIRE channel or generic I/O depending on fuses RSTDISBL and DWEN."
},
{
"number": "25",
"name": "PC5",
"type": "bidirectional",
"description": "Port C bit 5 with internal pull-up; alternate functions PCINT9 and OC.1B."
},
{
"number": "26",
"name": "PC4",
"type": "bidirectional",
"description": "Port C bit 4 with internal pull-up; alternate function PCINT10."
},
{
"number": "27",
"name": "UCAP",
"type": "passive",
"description": "USB pads internal regulator output supply voltage; connect an external 1 uF 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 all 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 exposed pad has no printed pin number, so I used \"33\" as a placeholder. The datasheet only says ; Pin types for the I/O ports, D+, D- and UCAP are my own classification. Pin 24 is classed as an inpu",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 22,
"cost_usd": 0.4914,
"at": "2026-10-23T12:07:56"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/en/DeviceDoc/7799S.pdf",
"pages": 22,
"sha256": "78639455b8b6b4e8",
"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": "atmega32u2-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": "2026-10-23",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atmega32u2-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": "ac9ccd0c6559cf9ce882d3cc2cc1cc2717b6958fbf094d4d825fe8c097fd8913",
"checked": "2026-10-23",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "VQFN-32-EP(5x5)",
"Category": "Embedded Processors & Controllers",
"Pins": "33"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "78639455b8b6b4e8dfb88b84275e1231f6a7c571f11d74091e50d02807d60cd1",
"rows": [
{
"name": "Operating supply voltage",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 2.7,
"typ": null,
"max": 5.5,
"conditions": "Operating Voltages",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Operating temperature (Industrial)",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "Industrial",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Maximum frequency at 2.7V",
"symbol": "",
"kind": "recommended_operating",
"unit": "MHz",
"min": null,
"typ": null,
"max": 8,
"conditions": "8 MHz at 2.7V - Industrial range",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Maximum frequency at 4.5V",
"symbol": "",
"kind": "recommended_operating",
"unit": "MHz",
"min": null,
"typ": null,
"max": 16,
"conditions": "16 MHz at 4.5V - Industrial range",
"source_page": 1,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"atmega32u2-mur"
],
"discovery_pitch": "ATMEGA32U2-MUR (Microchip Tech) 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",
"atmega32u2-mur.kicad_sym",
"atmega32u2-mur.kicad_mod",
"atmega32u2-mur.glb",
"atmega32u2-mur.step",
"atmega32u2-mur.lbr",
"docs/hero.png",
"docs/atmega32u2-mur-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"atmega32u2-mur-hero.glb",
"atmega32u2-mur-hero.overlay.json",
"atmega32u2-mur-etched.glb"
],
"visibility": {
"public": true
}
}