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atmega168a-aur
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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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README
markdownATMEGA168A-AUR
Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-32(7x7)
ATMEGA168A-AUR from Microchip Tech, in a TQFP-32(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | PD3 | bidirectional | Port D bit 3, a bi-directional I/O pin with internal pull-up that also serves as external interrupt INT1 and Timer/Counter2 output OC2B. |
| 2 | PD4 | bidirectional | Port D bit 4, a bi-directional I/O pin with internal pull-up that also serves as USART external clock XCK and Timer/Counter0 external counter input T0. |
| 3 | GND | power_in | Ground. |
| 4 | VCC | power_in | Digital supply voltage. |
| 5 | GND | power_in | Ground. |
| 6 | VCC | power_in | Digital supply voltage. |
| 7 | PB6 | bidirectional | Port B bit 6 that serves as chip clock oscillator pin 1 or external clock input (XTAL1) and as PCINT6 when not used as a clock pin. |
| 8 | PB7 | bidirectional | Port B bit 7 that serves as output of the inverting oscillator amplifier (XTAL2) and as PCINT7 when not used as a clock pin. |
| 9 | PD5 | bidirectional | Port D bit 5, a bi-directional I/O pin with internal pull-up that also serves as Timer/Counter1 external counter input T1 and Timer/Counter0 output OC0B. |
| 10 | PD6 | bidirectional | Port D bit 6, a bi-directional I/O pin that also serves as Analog Comparator positive input AIN0 and Timer/Counter0 output OC0A. |
| 11 | PD7 | bidirectional | Port D bit 7, a bi-directional I/O pin that also serves as Analog Comparator negative input AIN1. |
| 12 | PB0 | bidirectional | Port B bit 0, a bi-directional I/O pin that also serves as Timer/Counter1 input capture input ICP1 and divided system clock output CLKO. |
| 13 | PB1 (OC1A/PCINT1) | bidirectional | Port B bit 1, a bi-directional I/O pin that also serves as Timer/Counter1 output compare match A output OC1A. |
| 14 | PB2 (SS/OC1B/PCINT2) | bidirectional | Port B bit 2, a bi-directional I/O pin that also serves as SPI slave select SS and Timer/Counter1 output compare match B output OC1B. |
| 15 | PB3 (MOSI/OC2A/PCINT3) | bidirectional | Port B bit 3, a bi-directional I/O pin that also serves as SPI data MOSI and Timer/Counter2 output compare match A output OC2A. |
| 16 | PB4 (MISO/PCINT4) | bidirectional | Port B bit 4, a bi-directional I/O pin that also serves as SPI master data input and slave data output MISO. |
| 17 | PB5 (SCK/PCINT5) | bidirectional | Port B bit 5, a bi-directional I/O pin that also serves as SPI clock SCK. |
| 18 | AVCC | power_in | Supply voltage pin for the A/D Converter, which should be externally connected to VCC even if the ADC is not used. |
| 19 | ADC6 | passive | Analog input channel 6 of the A/D converter, powered from the analog supply in the TQFP package. |
| 20 | AREF | passive | Analog reference pin for the A/D Converter. |
| 21 | GND | power_in | Ground. |
| 22 | ADC7 | passive | Analog input channel 7 of the A/D converter, powered from the analog supply in the TQFP package. |
| 23 | PC0 (ADC0/PCINT8) | bidirectional | Port C bit 0, a bi-directional I/O pin that also serves as ADC input channel 0 using analog power and as PCINT8. |
| 24 | PC1 (ADC1/PCINT9) | bidirectional | Port C bit 1, a bi-directional I/O pin that also serves as ADC input channel 1 using analog power and as PCINT9. |
| 25 | PC2 (ADC2/PCINT10) | bidirectional | Port C bit 2, a bi-directional I/O pin that also serves as ADC input channel 2 using analog power and as PCINT10. |
| 26 | PC3 (ADC3/PCINT11) | bidirectional | Port C bit 3, a bi-directional I/O pin that also serves as ADC input channel 3 using analog power and as PCINT11. |
| 27 | PC4 (ADC4/SDA/PCINT12) | bidirectional | Port C bit 4, a bi-directional I/O pin that also serves as 2-wire serial data SDA and ADC input channel 4 using digital power. |
| 28 | PC5 (ADC5/SCL/PCINT13) | bidirectional | Port C bit 5, a bi-directional I/O pin that also serves as 2-wire serial clock SCL and ADC input channel 5 using digital power. |
| 29 | PC6 (RESET/PCINT14) | input | Reset input when the RSTDISBL fuse is unprogrammed, where a low level longer than the minimum pulse length generates a Reset; otherwise it is an I/O pin. |
| 30 | PD0 (RXD/PCINT16) | bidirectional | Port D bit 0, a bi-directional I/O pin that also serves as USART receive data input RXD. |
| 31 | PD1 (TXD/PCINT17) | bidirectional | Port D bit 1, a bi-directional I/O pin that also serves as USART transmit data output TXD. |
| 32 | PD2 (INT0/PCINT18) | bidirectional | Port D bit 2, a bi-directional I/O pin that also serves as external interrupt source INT0. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-32(7x7) |
| Category | Single Chip Microcomputer/Microcontroller |
| Pins | 32 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating Temperature | -55 | 125 | °C | 308 | |||
| Storage Temperature | -65 | 150 | °C | 308 | |||
| Voltage on any pin except RESET with respect to Ground | -0.5 | V | max printed as VCC+0.5V | 308 | |||
| Voltage on RESET with respect to Ground | -0.5 | 13 | V | 308 | |||
| DC Current per I/O Pin | 40 | mA | 308 | ||||
| DC Current VCC and GND Pins | 200 | mA | 308 | ||||
| Power Supply Voltage | VCC | 1.8 | 5.5 | V | ATmega168A-AUR, Industrial (-40C to 85C), speed 20 MHz | 632 | |
| Maximum Speed | 20 | MHz | ATmega168A-AUR, power supply 1.8-5.5 V | 632 |
CAD (KiCad official)
- Symbol:
ATMEGA168A-AUR - Footprint:
Package_QFP:TQFP-32_7x7mm_P0.8mm - 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files:
atmega168a-aur-etched.step/atmega168a-aur-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atmega168a-aur.step/atmega168a-aur.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (653 pp, sha256
b9b9d83cda56a95d, retrieved 2026-10-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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