component
ATMEGA328P-MU
Public Made by Adomby adom
Microchip Tech Microcontrollers (MCU/MPU/SOC), VQFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "atmega328p-mu",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Microcontrollers (MCU/MPU/SOC), VQFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"embedded processors & controllers",
"atmega328p-mu",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"atmega328p-mu.kicad_sym",
"atmega328p-mu.kicad_mod",
"atmega328p-mu.glb",
"atmega328p-mu.step",
"atmega328p-mu.lbr",
"docs/hero.png",
"docs/atmega328p-mu-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"atmega328p-mu-hero.glb",
"atmega328p-mu-hero.overlay.json",
"atmega328p-mu-etched.glb"
],
"component": {
"mpn": "ATMEGA328P-MU",
"manufacturer": "Microchip Tech",
"package": "VQFN-32(5x5)",
"pin_count": 33,
"category": "Embedded Processors & Controllers",
"subcategory": "Microcontrollers (MCU/MPU/SOC)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904807425732608",
"parts": {
"symbol": "atmega328p-mu.kicad_sym",
"footprint": "atmega328p-mu.kicad_mod",
"model_3d": "atmega328p-mu-hero.glb",
"model_3d_plain": "atmega328p-mu-etched.glb",
"model_3d_step": "atmega328p-mu-etched.step",
"model_3d_step_plain": "atmega328p-mu.step",
"lbr": "atmega328p-mu.lbr"
},
"distributor_links": {
"lcsc": "C7499261",
"digikey": "ATMEGA328P-MU-ND"
},
"distributor_check": {
"checked_at": "2026-10-18T21:49:15Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATMEGA328P-MU-ND",
"status": "found"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3, bi-directional I/O with internal pull-up, also INT1 external interrupt 1, OC2B Timer/Counter2 output, and PCINT19."
},
{
"number": "2",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4, bi-directional I/O with internal pull-up, also XCK USART external clock, T0 Timer/Counter0 external counter input, and PCINT20."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "4",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage; the datasheet lists the operating voltage as 1.8 to 5.5 V."
},
{
"number": "5",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "6",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage; the datasheet lists the operating voltage as 1.8 to 5.5 V."
},
{
"number": "7",
"name": "PB6",
"type": "bidirectional",
"description": "Port B bit 6, bi-directional I/O with internal pull-up, used as XTAL1/TOSC1 clock input to the inverting oscillator amplifier (or external clock input) depending on fuse settings, also PCINT6."
},
{
"number": "8",
"name": "PB7",
"type": "bidirectional",
"description": "Port B bit 7, bi-directional I/O with internal pull-up, used as XTAL2/TOSC2 output of the inverting oscillator amplifier depending on fuse settings, also PCINT7."
},
{
"number": "9",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5, bi-directional I/O with internal pull-up, also T1 Timer/Counter1 external counter input, OC0B output, and PCINT21."
},
{
"number": "10",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6, bi-directional I/O with internal pull-up, also AIN0 analog comparator positive input, OC0A output, and PCINT22."
},
{
"number": "11",
"name": "PD7",
"type": "bidirectional",
"description": "Port D bit 7, bi-directional I/O with internal pull-up, also AIN1 analog comparator negative input and PCINT23."
},
{
"number": "12",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0, bi-directional I/O with internal pull-up, also ICP1 input capture input, CLKO divided system clock output, and PCINT0."
},
{
"number": "13",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1, bi-directional I/O with internal pull-up, also OC1A Timer/Counter1 output compare A output and PCINT1."
},
{
"number": "14",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2, bi-directional I/O with internal pull-up, also SS SPI slave select, OC1B output compare B output, and PCINT2."
},
{
"number": "15",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3, bi-directional I/O with internal pull-up, also MOSI SPI data line, OC2A output compare A output, and PCINT3."
},
{
"number": "16",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4, bi-directional I/O with internal pull-up, also MISO SPI data line and PCINT4."
},
{
"number": "17",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5, bi-directional I/O with internal pull-up, also SCK SPI clock and PCINT5."
},
{
"number": "18",
"name": "AVCC",
"type": "power_in",
"description": "Supply voltage pin for the A/D converter, PC3:0 and ADC7:6, which should be connected to VCC even if the ADC is not used and through a low-pass filter if it is."
},
{
"number": "19",
"name": "ADC6",
"type": "input",
"description": "Analog input channel 6 of the 10-bit ADC, powered from the analog supply (TQFP and VQFN packages only)."
},
{
"number": "20",
"name": "AREF",
"type": "input",
"description": "Analog reference pin for the A/D converter."
},
{
"number": "21",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "22",
"name": "ADC7",
"type": "input",
"description": "Analog input channel 7 of the 10-bit ADC, powered from the analog supply (TQFP and VQFN packages only)."
},
{
"number": "23",
"name": "PC0",
"type": "bidirectional",
"description": "Port C bit 0, 7-bit bi-directional I/O with internal pull-up, also ADC0 analog input channel 0 (uses analog power) and PCINT8."
},
{
"number": "24",
"name": "PC1",
"type": "bidirectional",
"description": "Port C bit 1, bi-directional I/O with internal pull-up, also ADC1 analog input channel 1 (uses analog power) and PCINT9."
},
{
"number": "25",
"name": "PC2",
"type": "bidirectional",
"description": "Port C bit 2, bi-directional I/O with internal pull-up, also ADC2 analog input channel 2 (uses analog power) and PCINT10."
},
{
"number": "26",
"name": "PC3",
"type": "bidirectional",
"description": "Port C bit 3, bi-directional I/O with internal pull-up, also ADC3 analog input channel 3 (uses analog power) and PCINT11."
},
{
"number": "27",
"name": "PC4",
"type": "bidirectional",
"description": "Port C bit 4, bi-directional I/O with internal pull-up, also SDA 2-wire serial data I/O, ADC4 analog input channel 4 (uses digital power), and PCINT12."
},
{
"number": "28",
"name": "PC5",
"type": "bidirectional",
"description": "Port C bit 5, bi-directional I/O with internal pull-up, also SCL 2-wire serial clock I/O, ADC5 analog input channel 5 (uses digital power), and PCINT13."
},
{
"number": "29",
"name": "PC6",
"type": "bidirectional",
"description": "Port C bit 6, which is a Reset input when the RSTDISBL fuse is unprogrammed (a low level longer than the minimum pulse length generates a reset) and a normal I/O pin when the fuse is programmed; also PCINT14."
},
{
"number": "30",
"name": "PD0",
"type": "bidirectional",
"description": "Port D bit 0, bi-directional I/O with internal pull-up, also RXD USART receive data input and PCINT16."
},
{
"number": "31",
"name": "PD1",
"type": "bidirectional",
"description": "Port D bit 1, bi-directional I/O with internal pull-up, also TXD USART transmit data output and PCINT17."
},
{
"number": "32",
"name": "PD2",
"type": "bidirectional",
"description": "Port D bit 2, bi-directional I/O with internal pull-up, also INT0 external interrupt 0 input and PCINT18."
},
{
"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-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 datasheet has no numbered pin for the VQFN exposed (thermal) pad. Page 12 only says 'Bottom pad ; The VQFN-32 pin map on page 12 (Figure 1-1) is garbled in text extraction. The assignment above was ; The datasheet gives the VQFN-32 package as 32M1-A (32-pad, 5x5 mm, 0.50 mm pitch). The ordering code",
"exposed pad 33 added from the footprint"
],
"pages_sent": 126,
"cost_usd": 0.4072,
"at": "2026-10-18T21:47:00"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904807425732608",
"pages": 653,
"sha256": "b26db583d1d0520c",
"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": "atmega328p-mu.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5.0,
5.0,
0.875
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atmega328p-mu-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5.0,
5.0,
0.875
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "0a67d421deba00285064d3c68a92ae3206ef16ee013d40a30d25a1580bbee3a4",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}