component
ATMEGA328-MUR
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), VQFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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{
"slug": "atmega328-mur",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), VQFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"single chip microcomputer-microcontroller",
"atmega328-mur",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"atmega328-mur.kicad_sym",
"atmega328-mur.kicad_mod",
"atmega328-mur.glb",
"atmega328-mur.step",
"atmega328-mur.lbr",
"docs/hero.png",
"docs/atmega328-mur-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"atmega328-mur-hero.glb",
"atmega328-mur-hero.overlay.json",
"atmega328-mur-etched.glb"
],
"component": {
"mpn": "ATMEGA328-MUR",
"manufacturer": "Microchip Tech",
"package": "VQFN-32(5x5)",
"pin_count": 33,
"category": "Single Chip Microcomputer/Microcontroller",
"subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
"datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48A-PA-88A-PA-168A-PA-328-P-DS-DS40002061B.pdf",
"parts": {
"symbol": "atmega328-mur.kicad_sym",
"footprint": "atmega328-mur.kicad_mod",
"model_3d": "atmega328-mur-hero.glb",
"model_3d_plain": "atmega328-mur-etched.glb",
"model_3d_step": "atmega328-mur-etched.step",
"model_3d_step_plain": "atmega328-mur.step",
"lbr": "atmega328-mur.lbr"
},
"distributor_links": {
"lcsc": "C2052748",
"digikey": "ATMEGA328-MURTR-ND",
"mouser": "556-ATMEGA328-MUR"
},
"distributor_check": {
"checked_at": "2026-10-30T22:45:47Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATMEGA328-MURTR-ND",
"status": "found"
},
"mouser": {
"pn": "556-ATMEGA328-MUR",
"status": "found",
"lifecycle": "Not Recommended for New Designs"
}
},
"pins": [
{
"number": "1",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3 is a bi-directional I/O with internal pull-up that also serves as INT1 external interrupt source, OC2B output and PCINT19."
},
{
"number": "2",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4 is a bi-directional I/O with internal pull-up that also serves as USART external clock XCK, Timer/Counter0 counter input T0 and PCINT20."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the digital supply."
},
{
"number": "4",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage pin."
},
{
"number": "5",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the digital supply."
},
{
"number": "6",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage pin."
},
{
"number": "7",
"name": "PB6",
"type": "input",
"description": "Port B bit 6 is used as XTAL1 input to the inverting oscillator amplifier or external clock input, and also as TOSC1 and PCINT6."
},
{
"number": "8",
"name": "PB7",
"type": "output",
"description": "Port B bit 7 is used as XTAL2 output of the inverting oscillator amplifier, and also as TOSC2 and PCINT7."
},
{
"number": "9",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5 is a bi-directional I/O with internal pull-up that also serves as Timer/Counter1 external counter input T1, OC0B output and PCINT21."
},
{
"number": "10",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6 is a bi-directional I/O with internal pull-up that also serves as analog comparator positive input AIN0, OC0A output and PCINT22."
},
{
"number": "11",
"name": "PD7",
"type": "bidirectional",
"description": "Port D bit 7 is a bi-directional I/O with internal pull-up that also serves as analog comparator negative input AIN1 and PCINT23."
},
{
"number": "12",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 is a bi-directional I/O with internal pull-up that also serves as input capture input ICP1, divided system clock output CLKO and PCINT0."
},
{
"number": "13",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 is a bi-directional I/O with internal pull-up that also serves as Timer/Counter1 compare output OC1A and PCINT1."
},
{
"number": "14",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 is a bi-directional I/O with internal pull-up that also serves as SPI slave select SS, Timer/Counter1 compare output OC1B and PCINT2."
},
{
"number": "15",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 is a bi-directional I/O with internal pull-up that also serves as SPI MOSI, Timer/Counter2 compare output OC2A and PCINT3."
},
{
"number": "16",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 is a bi-directional I/O with internal pull-up that also serves as SPI MISO and PCINT4."
},
{
"number": "17",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 is a bi-directional I/O with internal pull-up that also serves as SPI clock SCK 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."
},
{
"number": "19",
"name": "ADC6",
"type": "input",
"description": "Analog input channel 6 of the 10-bit ADC, available only in the TQFP and VQFN packages and powered from the analog supply."
},
{
"number": "20",
"name": "AREF",
"type": "input",
"description": "Analog reference pin for the A/D converter."
},
{
"number": "21",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the digital supply."
},
{
"number": "22",
"name": "ADC7",
"type": "input",
"description": "Analog input channel 7 of the 10-bit ADC, available only in the TQFP and VQFN packages and powered from the analog supply."
},
{
"number": "23",
"name": "PC0",
"type": "bidirectional",
"description": "Port C bit 0 is a bi-directional I/O with internal pull-up that also serves as ADC input channel 0 and PCINT8."
},
{
"number": "24",
"name": "PC1",
"type": "bidirectional",
"description": "Port C bit 1 is a bi-directional I/O with internal pull-up that also serves as ADC input channel 1 and PCINT9."
},
{
"number": "25",
"name": "PC2",
"type": "bidirectional",
"description": "Port C bit 2 is a bi-directional I/O with internal pull-up that also serves as ADC input channel 2 and PCINT10."
},
{
"number": "26",
"name": "PC3",
"type": "bidirectional",
"description": "Port C bit 3 is a bi-directional I/O with internal pull-up that also serves as ADC input channel 3 and PCINT11."
},
{
"number": "27",
"name": "PC4",
"type": "bidirectional",
"description": "Port C bit 4 is a bi-directional I/O with internal pull-up that also serves as 2-wire serial data SDA, ADC input channel 4 and PCINT12, using digital power."
},
{
"number": "28",
"name": "PC5",
"type": "bidirectional",
"description": "Port C bit 5 is a bi-directional I/O with internal pull-up that also serves as 2-wire serial clock SCL, ADC input channel 5 and PCINT13, using digital power."
},
{
"number": "29",
"name": "PC6",
"type": "input",
"description": "PC6 is the Reset input when the RSTDISBL fuse is unprogrammed, where a low level longer than the minimum pulse length generates a reset, and otherwise an I/O pin, also PCINT14."
},
{
"number": "30",
"name": "PD0",
"type": "bidirectional",
"description": "Port D bit 0 is a bi-directional I/O with internal pull-up that also serves as USART receive data input RXD and PCINT16."
},
{
"number": "31",
"name": "PD1",
"type": "bidirectional",
"description": "Port D bit 1 is a bi-directional I/O with internal pull-up that also serves as USART transmit data output TXD and PCINT17."
},
{
"number": "32",
"name": "PD2",
"type": "bidirectional",
"description": "Port D bit 2 is a bi-directional I/O with internal pull-up that also serves as external interrupt source INT0 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 pinout figure for the 32-pad VQFN on page 12 has garbled header text, so pin numbers w",
"exposed pad 33 added from the footprint"
],
"pages_sent": 111,
"cost_usd": 0.115,
"at": "2026-10-30T22:45:32"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48A-PA-88A-PA-168A-PA-328-P-DS-DS40002061B.pdf",
"pages": 653,
"sha256": "b9b9d83cda56a95d",
"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": "atmega328-mur.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": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atmega328-mur-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": "b7e0ba5746fe1369d2561bf47e6f9b04065427cf0fc5f37b37415906b979c7aa",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}