component
ATMEGA168P-20AU
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"version": "0.1.0",
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"description": "Microchip Tech Pre-ordered MCUs, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"embedded processors & controllers",
"atmega168p-20au",
"factory-2.0.0",
"extractor-text"
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"component": {
"mpn": "ATMEGA168P-20AU",
"manufacturer": "Microchip Tech",
"package": "TQFP-32(7x7)",
"pin_count": 32,
"category": "Embedded Processors & Controllers",
"subcategory": "Pre-ordered MCUs",
"datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48P_88P_168P-DS40002065A.pdf",
"parts": {
"symbol": "atmega168p-20au.kicad_sym",
"footprint": "atmega168p-20au.kicad_mod",
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"lbr": "atmega168p-20au.lbr"
},
"distributor_links": {
"lcsc": "C1337245",
"digikey": "ATMEGA168P-20AU-ND",
"mouser": "556-ATMEGA168P-20AU"
},
"distributor_check": {
"checked_at": "2026-10-30T21:38:15Z",
"source": "Component Ocean /api/assign-pns",
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"pn": "ATMEGA168P-20AU-ND",
"status": "found"
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"pn": "556-ATMEGA168P-20AU",
"status": "found",
"lifecycle": "Not Recommended for New Designs"
}
},
"pins": [
{
"number": "1",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3 is a bidirectional I/O pin with internal pull-ups, also serving as external interrupt INT1, OC2B output compare output, and PCINT19 pin-change interrupt source."
},
{
"number": "2",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4 is a bidirectional I/O pin with internal pull-ups, also serving as USART external clock XCK, Timer/Counter0 external counter input T0, and PCINT20."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "4",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage."
},
{
"number": "5",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "6",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage."
},
{
"number": "7",
"name": "PB6",
"type": "input",
"description": "Depending on clock fuse settings, PB6 is the input to the inverting oscillator amplifier (XTAL1) or Timer Oscillator pin 1, and when used as a clock pin it cannot be used as an I/O pin."
},
{
"number": "8",
"name": "PB7",
"type": "output",
"description": "Depending on clock fuse settings, PB7 is the output of the inverting oscillator amplifier (XTAL2) or Timer Oscillator pin 2, and when used as a clock pin it cannot be used as an I/O pin."
},
{
"number": "9",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5 is a bidirectional I/O pin with internal pull-ups, also serving as Timer/Counter1 external counter input T1, OC0B output compare output, and PCINT21."
},
{
"number": "10",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6 is a bidirectional I/O pin with internal pull-ups, also serving as Analog Comparator positive input AIN0, OC0A output compare output, and PCINT22; configure as input with pull-up off when used as AIN0."
},
{
"number": "11",
"name": "PD7",
"type": "bidirectional",
"description": "Port D bit 7 is a bidirectional I/O pin with internal pull-ups, also serving as Analog Comparator negative input AIN1 and PCINT23; configure as input with pull-up off when used as AIN1."
},
{
"number": "12",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 is a bidirectional I/O pin with internal pull-ups, also serving as Timer/Counter1 input capture ICP1, divided system clock output CLKO, and PCINT0."
},
{
"number": "13",
"name": "PB1 (OC1A/PCINT1)",
"type": "bidirectional",
"description": "Port B bit 1 is a bidirectional I/O pin with internal pull-ups, also serving as Timer/Counter1 output compare output OC1A and PCINT1."
},
{
"number": "14",
"name": "PB2 (SS/OC1B/PCINT2)",
"type": "bidirectional",
"description": "Port B bit 2 is a bidirectional I/O pin with internal pull-ups, also serving as SPI slave select SS, Timer/Counter1 output compare output OC1B, and PCINT2."
},
{
"number": "15",
"name": "PB3 (MOSI/OC2A/PCINT3)",
"type": "bidirectional",
"description": "Port B bit 3 is a bidirectional I/O pin with internal pull-ups, also serving as SPI master output/slave input MOSI, Timer/Counter2 output compare output OC2A, and PCINT3."
},
{
"number": "16",
"name": "PB4 (MISO/PCINT4)",
"type": "bidirectional",
"description": "Port B bit 4 is a bidirectional I/O pin with internal pull-ups, also serving as SPI master input/slave output MISO and PCINT4."
},
{
"number": "17",
"name": "PB5 (SCK/PCINT5)",
"type": "bidirectional",
"description": "Port B bit 5 is a bidirectional I/O pin with internal pull-ups, also serving 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; it should be externally connected to VCC even if the ADC is not used, and through a low-pass filter if the ADC is used."
},
{
"number": "19",
"name": "ADC6",
"type": "input",
"description": "Analog input channel 6 of the 10-bit A/D converter (TQFP and QFN/MLF packages only), 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."
},
{
"number": "22",
"name": "ADC7",
"type": "input",
"description": "Analog input channel 7 of the 10-bit A/D converter (TQFP and QFN/MLF packages only), powered from the analog supply."
},
{
"number": "23",
"name": "PC0 (ADC0/PCINT8)",
"type": "bidirectional",
"description": "Port C bit 0 is a bidirectional I/O pin with internal pull-ups (Port C is 7-bit), also serving as ADC input channel 0 using analog power and PCINT8."
},
{
"number": "24",
"name": "PC1 (ADC1/PCINT9)",
"type": "bidirectional",
"description": "Port C bit 1 is a bidirectional I/O pin with internal pull-ups, also serving as ADC input channel 1 using analog power and PCINT9."
},
{
"number": "25",
"name": "PC2 (ADC2/PCINT10)",
"type": "bidirectional",
"description": "Port C bit 2 is a bidirectional I/O pin with internal pull-ups, also serving as ADC input channel 2 using analog power and PCINT10."
},
{
"number": "26",
"name": "PC3 (ADC3/PCINT11)",
"type": "bidirectional",
"description": "Port C bit 3 is a bidirectional I/O pin with internal pull-ups, also serving as ADC input channel 3 using analog power and PCINT11."
},
{
"number": "27",
"name": "PC4 (ADC4/SDA/PCINT12)",
"type": "bidirectional",
"description": "Port C bit 4 is a bidirectional I/O pin with internal pull-ups, also serving as 2-wire serial interface data SDA, ADC input channel 4 using digital power, and PCINT12."
},
{
"number": "28",
"name": "PC5 (ADC5/SCL/PCINT13)",
"type": "bidirectional",
"description": "Port C bit 5 is a bidirectional I/O pin with internal pull-ups, also serving as 2-wire serial interface clock SCL, ADC input channel 5 using digital power, and PCINT13."
},
{
"number": "29",
"name": "PC6 (RESET/PCINT14)",
"type": "input",
"description": "When the RSTDISBL fuse is unprogrammed this pin is a Reset input, and a low level longer than the minimum pulse length (Table 29-3) generates a Reset while shorter pulses are not ensured to reset; when RSTDISBL is programmed it is an I/O pin with electrical characteristics differing from other Port C pins."
},
{
"number": "30",
"name": "PD0 (RXD/PCINT16)",
"type": "bidirectional",
"description": "Port D bit 0 is a bidirectional I/O pin with internal pull-ups, serving as USART receive data input RXD when the USART receiver is enabled, and PCINT16."
},
{
"number": "31",
"name": "PD1 (TXD/PCINT17)",
"type": "bidirectional",
"description": "Port D bit 1 is a bidirectional I/O pin with internal pull-ups, serving as USART transmit data output TXD when the USART transmitter is enabled, and PCINT17."
},
{
"number": "32",
"name": "PD2 (INT0/PCINT18)",
"type": "bidirectional",
"description": "Port D bit 2 is a bidirectional I/O pin with internal pull-ups, also serving as external interrupt source INT0 and PCINT18."
}
],
"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 TQFP-32 pin-to-number mapping was reconstructed from the Figure 1-1 text extraction, which is sc; The datasheet does not assign KiCad ERC classes. Types for AREF, ADC6/ADC7, PB6/PB7 and PC6/RESET we; Pin 1 orientation and the 32A package outline are from the Packaging Information (page 421) and Orde"
],
"pages_sent": 76,
"cost_usd": 0.2801,
"at": "2026-10-30T21:38:04"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48P_88P_168P-DS40002065A.pdf",
"pages": 436,
"sha256": "aab081a362918ab9",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 32,
"described": 32,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"footprint_binding": "identity",
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"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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{
"file": "atmega168p-20au-etched.step",
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