component
ATMEGA8A-MU
Public Made by Adomby adom
Microchip Tech ATMEL & AVR, QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "atmega8a-mu",
"title": "ATMEGA8A-MU",
"brief": "Microchip Tech ATMEL & AVR, QFN-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",
"atmega8a-mu",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ATMEGA8A-MU",
"manufacturer": "Microchip Tech",
"package": "QFN-32-EP(5x5)",
"pin_count": 33,
"category": "Embedded Processors & Controllers",
"subcategory": "ATMEL & AVR",
"datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega8A-Data-Sheet-DS40001974B.pdf",
"parts": {
"symbol": "atmega8a-mu.kicad_sym",
"footprint": "atmega8a-mu.kicad_mod",
"model_3d": "atmega8a-mu-hero.glb",
"model_3d_plain": "atmega8a-mu-etched.glb",
"model_3d_step": "atmega8a-mu-etched.step",
"model_3d_step_plain": "atmega8a-mu.step",
"lbr": "atmega8a-mu.lbr"
},
"distributor_links": {
"lcsc": "C68004",
"digikey": "ATMEGA8A-MU-ND",
"mouser": "556-ATMEGA8A-MU"
},
"distributor_check": {
"checked_at": "2026-10-27T01:40:01Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATMEGA8A-MU-ND",
"status": "found"
},
"mouser": {
"pn": "556-ATMEGA8A-MU",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PD3/INT1",
"type": "bidirectional",
"description": "Port D bit 3, a bi-directional I/O with internal pull-up that can also serve as External Interrupt 1 input."
},
{
"number": "2",
"name": "PD4/XCK/T0",
"type": "bidirectional",
"description": "Port D bit 4, a bi-directional I/O with internal pull-up that can also serve as USART external clock XCK or Timer/Counter0 external counter input T0."
},
{
"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, specified at 2.7 - 5.5V."
},
{
"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, specified at 2.7 - 5.5V."
},
{
"number": "7",
"name": "PB6 (XTAL1/TOSC1)",
"type": "input",
"description": "Port B bit 6, used as input to the inverting oscillator amplifier (XTAL1) or as Timer Oscillator pin 1 depending on clock fuse settings."
},
{
"number": "8",
"name": "PB7 (XTAL2/TOSC2)",
"type": "output",
"description": "Port B bit 7, used as output from the inverting oscillator amplifier (XTAL2) or as Timer Oscillator pin 2 depending on clock fuse settings."
},
{
"number": "9",
"name": "PD5/T1",
"type": "bidirectional",
"description": "Port D bit 5, a bi-directional I/O with internal pull-up that can also serve as Timer/Counter1 external counter input T1."
},
{
"number": "10",
"name": "PD6/AIN0",
"type": "bidirectional",
"description": "Port D bit 6, a bi-directional I/O that serves as Analog Comparator positive input AIN0, with the internal pull-up switched off when used as comparator input."
},
{
"number": "11",
"name": "PD7/AIN1",
"type": "bidirectional",
"description": "Port D bit 7, a bi-directional I/O that serves as Analog Comparator negative input AIN1, with the internal pull-up switched off when used as comparator input."
},
{
"number": "12",
"name": "PB0/ICP1",
"type": "bidirectional",
"description": "Port B bit 0, a bi-directional I/O with internal pull-up that can act as Input Capture Pin ICP1 for Timer/Counter1."
},
{
"number": "13",
"name": "PB1 (OC1A)",
"type": "bidirectional",
"description": "Port B bit 1, a bi-directional I/O with internal pull-up that can serve as Timer/Counter1 Output Compare A output OC1A."
},
{
"number": "14",
"name": "PB2 (SS/OC1B)",
"type": "bidirectional",
"description": "Port B bit 2, a bi-directional I/O with internal pull-up that serves as SPI slave select SS or Timer/Counter1 Output Compare B output OC1B."
},
{
"number": "15",
"name": "PB3 (MOSI/OC2)",
"type": "bidirectional",
"description": "Port B bit 3, a bi-directional I/O with internal pull-up that serves as SPI MOSI or Timer/Counter2 Output Compare output OC2."
},
{
"number": "16",
"name": "PB4 (MISO)",
"type": "bidirectional",
"description": "Port B bit 4, a bi-directional I/O with internal pull-up that serves as SPI master input or slave output MISO."
},
{
"number": "17",
"name": "PB5 (SCK)",
"type": "bidirectional",
"description": "Port B bit 5, a bi-directional I/O with internal pull-up that serves as SPI clock SCK."
},
{
"number": "18",
"name": "AVCC",
"type": "power_in",
"description": "Supply voltage pin for the A/D converter and ADC channels 6 and 7, to be connected to VCC even when the ADC is not used."
},
{
"number": "19",
"name": "ADC6",
"type": "passive",
"description": "ADC analog input channel 6, available only in the TQFP and VQFN packages and powered from the analog supply."
},
{
"number": "20",
"name": "AREF",
"type": "passive",
"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": "passive",
"description": "ADC analog input channel 7, available only in the TQFP and VQFN packages and powered from the analog supply."
},
{
"number": "23",
"name": "PC0 (ADC0)",
"type": "bidirectional",
"description": "Port C bit 0, a bi-directional I/O with internal pull-up that can also serve as ADC input channel 0 using analog power."
},
{
"number": "24",
"name": "PC1 (ADC1)",
"type": "bidirectional",
"description": "Port C bit 1, a bi-directional I/O with internal pull-up that can also serve as ADC input channel 1 using analog power."
},
{
"number": "25",
"name": "PC2 (ADC2)",
"type": "bidirectional",
"description": "Port C bit 2, a bi-directional I/O with internal pull-up that can also serve as ADC input channel 2 using analog power."
},
{
"number": "26",
"name": "PC3 (ADC3)",
"type": "bidirectional",
"description": "Port C bit 3, a bi-directional I/O with internal pull-up that can also serve as ADC input channel 3 using analog power."
},
{
"number": "27",
"name": "PC4 (SDA/ADC4)",
"type": "bidirectional",
"description": "Port C bit 4, a bi-directional I/O with internal pull-up that serves as Two-wire Serial Data SDA or ADC input channel 4 using digital power."
},
{
"number": "28",
"name": "PC5 (SCL/ADC5)",
"type": "bidirectional",
"description": "Port C bit 5, a bi-directional I/O with internal pull-up that serves as Two-wire Serial Clock SCL or ADC input channel 5 using digital power."
},
{
"number": "29",
"name": "PC6 (RESET)",
"type": "input",
"description": "Reset input when the RSTDISBL fuse is unprogrammed; a low level longer than the minimum pulse length generates a reset, otherwise it is a normal I/O pin with different electrical characteristics."
},
{
"number": "30",
"name": "PD0 (RXD)",
"type": "bidirectional",
"description": "Port D bit 0, a bi-directional I/O with internal pull-up that serves as USART receive data input RXD when the receiver is enabled."
},
{
"number": "31",
"name": "PD1 (TXD)",
"type": "bidirectional",
"description": "Port D bit 1, a bi-directional I/O with internal pull-up that serves as USART transmit data output TXD when the transmitter is enabled."
},
{
"number": "32",
"name": "PD2 (INT0)",
"type": "bidirectional",
"description": "Port D bit 2, a bi-directional I/O with internal pull-up that can serve as External Interrupt 0 input INT0."
},
{
"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 exposed center pad under the VQFN package is not given a numbered pin in the datasheet, so it is",
"19/33 pins cited to the wrong page (name found elsewhere): ['8:PB7 (XTAL2/TOSC2)@p63', '12:PB0/ICP1@p64', '14:PB2 (SS/OC1B)@p64', '15:PB3 (MOSI/OC2)@p64']"
],
"pages_sent": 76,
"cost_usd": 0.0874,
"at": "2026-10-27T01:39:30"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega8A-Data-Sheet-DS40001974B.pdf",
"pages": 327,
"sha256": "e10f0e392857e034",
"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": [
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atmega8a-mu-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
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"footprint_binding": "identity",
"sha256": "32add82135ace6f74a575404aa4e3b85cbef00848dc8c5fea95677edf7b4f531",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-32-EP(5x5)",
"Category": "Embedded Processors & Controllers",
"Pins": "33"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "e10f0e392857e034d0a39546405fb32702f8e00396d9cac60e997755dd8887cb",
"rows": [
{
"name": "Operating Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 232,
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{
"name": "Storage Temperature",
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"min": -65,
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"max": 150,
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{
"name": "Voltage on RESET with respect to Ground",
"symbol": "",
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"unit": "V",
"min": -0.5,
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"max": 13,
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{
"name": "Maximum Operating Voltage",
"symbol": "",
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"min": null,
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"max": 6,
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{
"name": "DC Current per I/O Pin",
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"unit": "mA",
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{
"name": "DC Current VCC and GND Pins",
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"min": null,
"typ": null,
"max": 300,
"conditions": "",
"source_page": 232,
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{
"name": "Digital supply voltage",
"symbol": "VCC",
"kind": "recommended_operating",
"unit": "V",
"min": 2.7,
"typ": null,
"max": 5.5,
"conditions": "TA = -40°C to 85°C",
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"name": "Operating temperature range",
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{
"name": "Output Low Voltage (Ports B,C,D)",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.9,
"conditions": "IOL = 20mA, VCC = 5V",
"source_page": 232,
"source": "datasheet"
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{
"name": "Output Low Voltage (Ports B,C,D)",
"symbol": "VOL",
"kind": "electrical",
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"min": null,
"typ": null,
"max": 0.6,
"conditions": "IOL = 10mA, VCC = 3V",
"source_page": 232,
"source": "datasheet"
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{
"name": "Output High Voltage (Ports B,C,D)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 4.2,
"typ": null,
"max": null,
"conditions": "IOH = -20mA, VCC = 5V",
"source_page": 232,
"source": "datasheet"
},
{
"name": "Output High Voltage (Ports B,C,D)",
"symbol": "VOH",
"kind": "electrical",
"unit": "V",
"min": 2.2,
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"max": null,
"conditions": "IOH = -10mA, VCC = 3V",
"source_page": 232,
"source": "datasheet"
},
{
"name": "Input Leakage Current I/O Pin (low)",
"symbol": "IIL",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 1,
"conditions": "Vcc = 5.5V, pin low (absolute value)",
"source_page": 232,
"source": "datasheet"
},
{
"name": "Input Leakage Current I/O Pin (high)",
"symbol": "IIH",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 1,
"conditions": "Vcc = 5.5V, pin high (absolute value)",
"source_page": 232,
"source": "datasheet"
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{
"name": "Reset Pull-up Resistor",
"symbol": "RRST",
"kind": "electrical",
"unit": "k",
"min": 30,
"typ": null,
"max": 80,
"conditions": "",
"source_page": 233,
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{
"name": "I/O Pin Pull-up Resistor",
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"min": 20,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 233,
"source": "datasheet"
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{
"name": "Power Supply Current Active",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 5,
"conditions": "Active 4MHz, VCC = 3V",
"source_page": 233,
"source": "datasheet"
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{
"name": "Power Supply Current Active",
"symbol": "ICC",
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"typ": null,
"max": 15,
"conditions": "Active 8MHz, VCC = 5V",
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{
"name": "Power Supply Current Idle",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 2,
"conditions": "Idle 4MHz, VCC = 3V",
"source_page": 233,
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{
"name": "Power Supply Current Idle",
"symbol": "ICC",
"kind": "electrical",
"unit": "mA",
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"typ": null,
"max": 7,
"conditions": "Idle 8MHz, VCC = 5V",
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{
"name": "Power Supply Current Power-down",
"symbol": "ICC",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 28,
"conditions": "Power-down mode, WDT enabled, VCC = 3V",
"source_page": 233,
"source": "datasheet"
},
{
"name": "Power Supply Current Power-down",
"symbol": "ICC",
"kind": "electrical",
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"min": null,
"typ": null,
"max": 3,
"conditions": "Power-down mode, WDT disabled, VCC = 3V",
"source_page": 233,
"source": "datasheet"
},
{
"name": "Analog Comparator Input Offset Voltage",
"symbol": "VACIO",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": null,
"max": 40,
"conditions": "VCC = 5V, Vin = VCC/2",
"source_page": 233,
"source": "datasheet"
},
{
"name": "Analog Comparator Input Leakage Current",
"symbol": "IACLK",
"kind": "electrical",
"unit": "nA",
"min": -50,
"typ": null,
"max": 50,
"conditions": "VCC = 5V, Vin = VCC/2",
"source_page": 233,
"source": "datasheet"
},
{
"name": "Analog Comparator Propagation Delay",
"symbol": "tACPD",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
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"conditions": "VCC = 2.7V",
"source_page": 233,
"source": "datasheet"
},
{
"name": "Analog Comparator Propagation Delay",
"symbol": "tACPD",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 500,
"conditions": "VCC = 5.0V",
"source_page": 233,
"source": "datasheet"
},
{
"name": "Oscillator Frequency",
"symbol": "1/tCLCL",
"kind": "timing",
"unit": "MHz",
"min": 0,
"typ": null,
"max": 8,
"conditions": "VCC = 2.7V to 5.5V",
"source_page": 234,
"source": "datasheet"
},
{
"name": "Oscillator Frequency",
"symbol": "1/tCLCL",
"kind": "timing",
"unit": "MHz",
"min": 0,
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