component
ATMEGA32A-MU
Public Made by Adomby adom
Microchip Tech Microcontrollers (MCU/MPU/SOC), VQFN-44(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "atmega32a-mu",
"title": "ATMEGA32A-MU",
"brief": "Microchip Tech Microcontrollers (MCU/MPU/SOC), VQFN-44(7x7). 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",
"atmega32a-mu",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ATMEGA32A-MU",
"manufacturer": "Microchip Tech",
"package": "VQFN-44(7x7)",
"pin_count": 45,
"category": "Embedded Processors & Controllers",
"subcategory": "Microcontrollers (MCU/MPU/SOC)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589012358685732864",
"parts": {
"symbol": "atmega32a-mu.kicad_sym",
"footprint": "atmega32a-mu.kicad_mod",
"model_3d": "atmega32a-mu-hero.glb",
"model_3d_plain": "atmega32a-mu-etched.glb",
"model_3d_step": "atmega32a-mu-etched.step",
"model_3d_step_plain": "atmega32a-mu.step",
"lbr": "atmega32a-mu.lbr"
},
"distributor_links": {
"lcsc": "C1337999",
"digikey": "ATMEGA32A-MU-ND",
"mouser": "556-ATMEGA32A-MU"
},
"distributor_check": {
"checked_at": "2026-10-19T07:47:36Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATMEGA32A-MU-ND",
"status": "found"
},
"mouser": {
"pn": "556-ATMEGA32A-MU",
"status": "found",
"lifecycle": "Not Recommended for New Designs"
}
},
"pins": [
{
"number": "1",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 bi-directional I/O with internal pull-up; alternate function MOSI (SPI master data out / slave data in)."
},
{
"number": "2",
"name": "PB6",
"type": "bidirectional",
"description": "Port B bit 6 bi-directional I/O with internal pull-up; alternate function MISO (SPI master data in / slave data out)."
},
{
"number": "3",
"name": "PB7",
"type": "bidirectional",
"description": "Port B bit 7 bi-directional I/O with internal pull-up; alternate function SCK (SPI bus serial clock)."
},
{
"number": "4",
"name": "RESET",
"type": "input",
"description": "Active-low reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running."
},
{
"number": "5",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage."
},
{
"number": "6",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "7",
"name": "XTAL2",
"type": "output",
"description": "Output from the inverting oscillator amplifier."
},
{
"number": "8",
"name": "XTAL1",
"type": "input",
"description": "Input to the inverting oscillator amplifier and to the internal clock operating circuit."
},
{
"number": "9",
"name": "PD0",
"type": "bidirectional",
"description": "Port D bit 0 bi-directional I/O with internal pull-up; alternate function RXD (USART input)."
},
{
"number": "10",
"name": "PD1",
"type": "bidirectional",
"description": "Port D bit 1 bi-directional I/O with internal pull-up; alternate function TXD (USART output)."
},
{
"number": "11",
"name": "PD2",
"type": "bidirectional",
"description": "Port D bit 2 bi-directional I/O with internal pull-up; alternate function INT0 (external interrupt 0 input)."
},
{
"number": "12",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3 bi-directional I/O with internal pull-up; alternate function INT1 (external interrupt 1 input)."
},
{
"number": "13",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4 bi-directional I/O with internal pull-up; alternate function OC1B (Timer/Counter1 output compare B)."
},
{
"number": "14",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5 bi-directional I/O with internal pull-up; alternate function OC1A (Timer/Counter1 output compare A)."
},
{
"number": "15",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6 bi-directional I/O with internal pull-up; alternate function ICP1 (Timer/Counter1 input capture)."
},
{
"number": "16",
"name": "PD7",
"type": "bidirectional",
"description": "Port D bit 7 bi-directional I/O with internal pull-up; alternate function OC2 (Timer/Counter2 output compare)."
},
{
"number": "17",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage."
},
{
"number": "18",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "19",
"name": "PC0",
"type": "bidirectional",
"description": "Port C bit 0 bi-directional I/O with internal pull-up; alternate function SCL (two-wire serial interface clock)."
},
{
"number": "20",
"name": "PC1",
"type": "bidirectional",
"description": "Port C bit 1 bi-directional I/O with internal pull-up; alternate function SDA (two-wire serial interface data)."
},
{
"number": "21",
"name": "PC2",
"type": "bidirectional",
"description": "Port C bit 2 bi-directional I/O with internal pull-up; alternate function TCK (JTAG test clock), pull-up active during reset when JTAG is enabled."
},
{
"number": "22",
"name": "PC3",
"type": "bidirectional",
"description": "Port C bit 3 bi-directional I/O with internal pull-up; alternate function TMS (JTAG test mode select), pull-up active during reset when JTAG is enabled."
},
{
"number": "23",
"name": "PC4",
"type": "bidirectional",
"description": "Port C bit 4 bi-directional I/O with internal pull-up; alternate function TDO (JTAG test data out), tri-stated unless TAP states shift out data."
},
{
"number": "24",
"name": "PC5",
"type": "bidirectional",
"description": "Port C bit 5 bi-directional I/O with internal pull-up; alternate function TDI (JTAG test data in), pull-up active during reset when JTAG is enabled."
},
{
"number": "25",
"name": "PC6",
"type": "bidirectional",
"description": "Port C bit 6 bi-directional I/O with internal pull-up; alternate function TOSC1 (Timer oscillator input, used when AS2 is set)."
},
{
"number": "26",
"name": "PC7",
"type": "bidirectional",
"description": "Port C bit 7 bi-directional I/O with internal pull-up; alternate function TOSC2 (Timer oscillator output, used when AS2 is set)."
},
{
"number": "27",
"name": "AVCC",
"type": "power_in",
"description": "Supply voltage for Port A and the A/D converter; must be connected to VCC even if the ADC is unused, through a low-pass filter if the ADC is used."
},
{
"number": "28",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "29",
"name": "AREF",
"type": "input",
"description": "Analog reference pin for the A/D converter."
},
{
"number": "30",
"name": "PA7",
"type": "bidirectional",
"description": "Port A bit 7 bi-directional I/O with internal pull-up; alternate function ADC7 (ADC input channel 7)."
},
{
"number": "31",
"name": "PA6",
"type": "bidirectional",
"description": "Port A bit 6 bi-directional I/O with internal pull-up; alternate function ADC6 (ADC input channel 6)."
},
{
"number": "32",
"name": "PA5",
"type": "bidirectional",
"description": "Port A bit 5 bi-directional I/O with internal pull-up; alternate function ADC5 (ADC input channel 5)."
},
{
"number": "33",
"name": "PA4",
"type": "bidirectional",
"description": "Port A bit 4 bi-directional I/O with internal pull-up; alternate function ADC4 (ADC input channel 4)."
},
{
"number": "34",
"name": "PA3",
"type": "bidirectional",
"description": "Port A bit 3 bi-directional I/O with internal pull-up; alternate function ADC3 (ADC input channel 3)."
},
{
"number": "35",
"name": "PA2",
"type": "bidirectional",
"description": "Port A bit 2 bi-directional I/O with internal pull-up; alternate function ADC2 (ADC input channel 2)."
},
{
"number": "36",
"name": "PA1",
"type": "bidirectional",
"description": "Port A bit 1 bi-directional I/O with internal pull-up; alternate function ADC1 (ADC input channel 1)."
},
{
"number": "37",
"name": "PA0",
"type": "bidirectional",
"description": "Port A bit 0 bi-directional I/O with internal pull-up; alternate function ADC0 (ADC input channel 0)."
},
{
"number": "38",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage."
},
{
"number": "39",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "40",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 bi-directional I/O with internal pull-up; alternate functions T0 (Timer/Counter0 external counter input) and XCK (USART external clock)."
},
{
"number": "41",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 bi-directional I/O with internal pull-up; alternate function T1 (Timer/Counter1 external counter input)."
},
{
"number": "42",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 bi-directional I/O with internal pull-up; alternate functions AIN0 (analog comparator positive input) and INT2 (external interrupt 2 input)."
},
{
"number": "43",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 bi-directional I/O with internal pull-up; alternate functions AIN1 (analog comparator negative input) and OC0 (Timer/Counter0 output compare)."
},
{
"number": "44",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 bi-directional I/O with internal pull-up; alternate function SS (SPI slave select input)."
},
{
"number": "45",
"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 supplied text does not print pin numbers for the 44-pad QFN/MLF package. Figure 1-1 (page 10) is; Package 44M1 (44-pad QFN/MLF 7x7) is confirmed by the ordering information on page 329. The datashee; Pin types and descriptions for tri-state and bidirectional pins follow the alternate-function tables",
"exposed pad 45 added from the footprint",
"31/45 pins cited to the wrong page (name found elsewhere): ['7:XTAL2@p13', '8:XTAL1@p13', '15:PD6 (ICP1)@p69', '16:PD7 (OC2)@p68']"
],
"pages_sent": 50,
"cost_usd": 0.6575,
"at": "2026-10-19T07:45:02"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589012358685732864",
"pages": 339,
"sha256": "a12026626ab84321",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 45,
"described": 45,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "atmega32a-mu.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7,
7,
0.77
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "e095902326bdaee7dcc9926c9d1613852bfa37bad68a82560157ca7fe509925a",
"checked": "2026-10-19",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atmega32a-mu-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7,
7,
0.77
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "3f8dd07020dd6eaeff67e5e107f79ae3a0bcf7b7343f078d84884b0e6f857aa8",
"checked": "2026-10-19",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "VQFN-44(7x7)",
"Category": "Embedded Processors & Controllers",
"Pins": "45"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "a12026626ab84321fd1520dc105a916e5636485665df57efecf75c330806e64a",
"rows": [
{
"name": "Operating Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Storage Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Voltage on any Pin except RESET with respect to Ground",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "upper limit printed as VCC+0.5V",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Voltage on RESET with respect to Ground",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 13,
"conditions": "",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Maximum Operating Voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 286,
"source": "datasheet"
},
{
"name": "DC Current per I/O Pin",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 40,
"conditions": "",
"source_page": 286,
"source": "datasheet"
},
{
"name": "DC Current VCC Pin",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 200,
"conditions": "TQFP/MLF package",
"source_page": 286,
"source": "datasheet"
},
{
"name": "DC Current GND Pin",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 400,
"conditions": "TQFP/MLF package",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Input Low Voltage except XTAL1 and RESET pins",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "VCC = 4.5 - 5.5",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Input Low Voltage XTAL1 pin",
"symbol": "VIL1",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "VCC = 2.7 - 5.5",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Input Low Voltage RESET pin",
"symbol": "VIL2",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "VCC = 2.7 - 5.5",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Output Low Voltage (Ports A,B,C,D)",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.7,
"conditions": "IOL = 20 mA, VCC = 5V",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Output Low Voltage (Ports A,B,C,D)",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.5,
"conditions": "IOL = 10 mA, VCC = 3V",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Output High Voltage (Ports A,B,C,D)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 4.2,
"typ": null,
"max": null,
"conditions": "IOH = -20 mA, VCC = 5V",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Output High Voltage (Ports A,B,C,D)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 2.2,
"typ": null,
"max": null,
"conditions": "IOH = -10 mA, VCC = 3V",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Input Leakage Current I/O Pin, pin low",
"symbol": "IIL",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 1,
"conditions": "VCC = 5.5V, pin low (absolute value)",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Input Leakage Current I/O Pin, pin high",
"symbol": "IIH",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 1,
"conditions": "VCC = 5.5V, pin high (absolute value)",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Reset Pull-up Resistor",
"symbol": "RRST",
"kind": "electrical",
"unit": "kΩ",
"min": 30,
"typ": 60,
"max": 85,
"conditions": "",
"source_page": 286,
"source": "datasheet"
},
{
"name": "I/O Pin Pull-up Resistor",
"symbol": "Rpu",
"kind": "electrical",
"unit": "kΩ",
"min": 20,
"typ": 50,
"max": null,
"conditions": "",
"source_page": 286,
"source": "datasheet"
},
{
"name": "Power Supply Current Active 4MHz",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 2.1,
"max": 5,
"conditions": "VCC = 3V",
"source_page": 287,
"source": "datasheet"
},
{
"name": "Power Supply Current Active 8MHz",
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