component
ATMEGA16U2-AU
Public Made by Adomby adom
Microchip Tech ATMEL & AVR, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
Ray
Publish 0.1.1
11790d5
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{
"schema_version": 1,
"type": "component",
"slug": "atmega16u2-au",
"title": "ATMEGA16U2-AU",
"brief": "Microchip Tech ATMEL & AVR, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.1",
"license": "CC-BY-SA-4.0",
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"atmega16u2-au",
"factory-2.0.0",
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],
"component": {
"mpn": "ATMEGA16U2-AU",
"manufacturer": "Microchip Tech",
"package": "TQFP-32(7x7)",
"pin_count": 32,
"category": "Embedded Processors & Controllers",
"subcategory": "ATMEL & AVR",
"datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/7799S.pdf",
"parts": {
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"footprint": "atmega16u2-au.kicad_mod",
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"model_3d_plain": "atmega16u2-au.glb",
"model_3d_step": "atmega16u2-au-etched.step",
"model_3d_step_plain": "atmega16u2-au.step",
"lbr": "atmega16u2-au.lbr"
},
"distributor_links": {
"lcsc": "C59019",
"digikey": "ATMEGA16U2-AU-ND",
"mouser": "556-ATMEGA16U2-AU"
},
"distributor_check": {
"checked_at": "2026-11-05T18:52:57Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATMEGA16U2-AU-ND",
"status": "found"
},
"mouser": {
"pn": "556-ATMEGA16U2-AU",
"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 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 OC.0B and INT0."
},
{
"number": "7",
"name": "PD1",
"type": "bidirectional",
"description": "Port D bit 1 I/O with internal pull-up; alternate functions AIN0 and INT1."
},
{
"number": "8",
"name": "PD2",
"type": "bidirectional",
"description": "Port D bit 2 I/O with internal pull-up; alternate functions RXD1, AIN1 and INT2."
},
{
"number": "9",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3 I/O with internal pull-up; alternate functions TXD1 and INT3."
},
{
"number": "10",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4 I/O with internal pull-up; alternate functions INT5 and AIN3."
},
{
"number": "11",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5 I/O with internal pull-up; alternate functions XCK, AIN4 and PCINT12."
},
{
"number": "12",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6 I/O with internal pull-up; alternate functions RTS, AIN5 and INT6."
},
{
"number": "13",
"name": "PD7",
"type": "bidirectional",
"description": "Port D bit 7 I/O with internal pull-up; alternate functions CTS, HWB, AIN6, T0 and INT7."
},
{
"number": "14",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 I/O with internal pull-up; alternate functions SS and PCINT0."
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 I/O with internal pull-up; alternate functions SCLK and PCINT1."
},
{
"number": "16",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 I/O with internal pull-up; alternate functions PDI, MOSI and PCINT2."
},
{
"number": "17",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 I/O with internal pull-up; alternate functions PDO, MISO and PCINT3."
},
{
"number": "18",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 I/O with internal pull-up; alternate functions T1 and PCINT4."
},
{
"number": "19",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 I/O with internal pull-up; alternate function PCINT5."
},
{
"number": "20",
"name": "PB6",
"type": "bidirectional",
"description": "Port B bit 6 I/O with internal pull-up; alternate function PCINT6."
},
{
"number": "21",
"name": "PB7",
"type": "bidirectional",
"description": "Port B bit 7 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 I/O with internal pull-up; alternate functions INT4, ICP1 and CLKO."
},
{
"number": "23",
"name": "PC6",
"type": "bidirectional",
"description": "Port C bit 6 I/O with internal pull-up; alternate functions OC.1A and PCINT8."
},
{
"number": "24",
"name": "RESET/PC1/dW",
"type": "bidirectional",
"description": "Reset input (low level longer than minimum pulse length generates a reset), alternatively debugWire channel or generic I/O depending on fuses RSTDISBL and DWEN."
},
{
"number": "25",
"name": "PC5",
"type": "bidirectional",
"description": "Port C bit 5 I/O with internal pull-up; alternate functions PCINT9 and OC.1B."
},
{
"number": "26",
"name": "PC4",
"type": "bidirectional",
"description": "Port C bit 4 I/O with internal pull-up; alternate function PCINT10."
},
{
"number": "27",
"name": "UCAP",
"type": "power_out",
"description": "USB pads internal regulator output supply voltage; should be connected to an external 1uF 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."
}
],
"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 pin-number-to-name assignment is not stated as a table in the text. Figure 1-1 (page 2) was extr; The QFN32 and TQFP32 pinouts are printed together on page 2. The MPN ATMEGA16U2-AU is ordered in the; Pin types are KiCad ERC classes chosen from the pin descriptions. RESET/PC1/dW is typed as input bec",
"12/32 pins cited to the wrong page (name found elsewhere): ['2:PC2 (PCINT11/AIN2)@p5', '6:PD4 (INT5/AIN3)@p5', '7:PD3 (TXD1/INT3)@p5', '16:D-@p5']"
],
"pages_sent": 22,
"cost_usd": 0.2475,
"at": "2026-11-05T18:52:39"
},
"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": 32,
"described": 32,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
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"up": "Z",
"units": "mm",
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"seat": "z = 0",
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9,
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "53431be61c684e9d923915676a90cb08050c23ee3f834d76a77a3b19b41422f1",
"checked": "2026-11-05",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atmega16u2-au-etched.step",
"role": "eda",
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"origin": "footprint origin = pad-pattern centre",
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"sha256": "7648c626a6386b2ad617e977c828eaee60b7ddd71755abbd984927eba46aa84e",
"checked": "2026-11-05",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
],
"package_dims": {
"package_code": "32A",
"source_page": 14,
"e": {
"nom_mm": 0.8,
"range_mm": [
null,
null
]
},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "atmega16u2-au.step",
"verdict": "SKIP",
"reasons": [
"the datasheet dimensions give no height or body size to compare"
],
"by": "factory/package_fit.py"
}
}
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "TQFP-32(7x7)",
"Category": "Embedded Processors & Controllers",
"Pins": "32"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "78639455b8b6b4e8dfb88b84275e1231f6a7c571f11d74091e50d02807d60cd1",
"rows": [
{
"name": "Operating voltage (supply range)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 2.7,
"typ": null,
"max": 5.5,
"conditions": "Operating voltages, industrial range",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Operating temperature",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "Industrial range",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Maximum frequency",
"symbol": "",
"kind": "recommended_operating",
"unit": "MHz",
"min": null,
"typ": null,
"max": 8,
"conditions": "At 2.7 V, industrial range",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Maximum frequency",
"symbol": "",
"kind": "recommended_operating",
"unit": "MHz",
"min": null,
"typ": null,
"max": 16,
"conditions": "At 4.5 V, industrial range",
"source_page": 1,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
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"discovery_triggers": [
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],
"discovery_pitch": "ATMEGA16U2-AU (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray"
},
"dependencies": {},
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"visibility": "public",
"description": "Microchip Tech ATMEL & AVR, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"org": "adom"
}