# ATMEGA328PB-AUR

**Microchip Tech** · MICROCHIP · TQFP-32(7x7)

ATMEGA328PB-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 is a bidirectional I/O pin with internal pull-up, also usable as external interrupt INT1, Timer 2 output OC2B, or PTC X/Y sensor line. |
| 2 | PD4 | bidirectional | Port D bit 4 is a bidirectional I/O pin with internal pull-up, also usable as USART0 clock XCK0, Timer/Counter0 external clock T0, or PTC sensor line. |
| 3 | PE0 | bidirectional | Port E bit 0 is a bidirectional I/O pin with internal pull-up, also usable as Timer 4 input capture ICP4, TWI1 data SDA1, analog comparator output ACO, or PTC sensor line. |
| 4 | VCC | power_in | Digital supply voltage. |
| 5 | GND | power_in | Ground. |
| 6 | PE1 | bidirectional | Port E bit 1 is a bidirectional I/O pin with internal pull-up, also usable as TWI1 clock SCL1, Timer/Counter4 external clock T4, or PTC sensor line. |
| 7 | PB6 | bidirectional | Port B bit 6 is an I/O pin that, depending on clock fuse settings, serves as input to the inverting oscillator amplifier and internal clock circuit (XTAL1/TOSC1). |
| 8 | PB7 | bidirectional | Port B bit 7 is an I/O pin that, depending on clock fuse settings, serves as output from the inverting oscillator amplifier (XTAL2/TOSC2). |
| 9 | PD5 | bidirectional | Port D bit 5 is a bidirectional I/O pin with internal pull-up, also usable as Timer/Counter0 output OC0B, Timer/Counter1 external clock T1, or PTC sensor line. |
| 10 | PD6 | bidirectional | Port D bit 6 is a bidirectional I/O pin with internal pull-up, also usable as Timer/Counter0 output OC0A, analog comparator positive input AIN0, or PTC sensor line. |
| 11 | PD7 | bidirectional | Port D bit 7 is a bidirectional I/O pin with internal pull-up, also usable as analog comparator negative input AIN1 or PTC sensor line. |
| 12 | PB0 | bidirectional | Port B bit 0 is a bidirectional I/O pin with internal pull-up, also usable as Timer 1 input capture ICP1, clock output CLKO, or PTC sensor line. |
| 13 | PB1 | bidirectional | Port B bit 1 is a bidirectional I/O pin with internal pull-up, also usable as Timer/Counter1 output OC1A or PTC sensor line. |
| 14 | PB2 | bidirectional | Port B bit 2 is a bidirectional I/O pin with internal pull-up, also usable as Timer/Counter1 output OC1B, SPI0 slave select SS0, or PTC sensor line. |
| 15 | PB3 | bidirectional | Port B bit 3 is a bidirectional I/O pin with internal pull-up, also usable as Timer 2 output OC2A, USART1 transmit TXD1, SPI0 MOSI, or PTC sensor line. |
| 16 | PB4 | bidirectional | Port B bit 4 is a bidirectional I/O pin with internal pull-up, also usable as SPI0 MISO, USART1 receive RXD1, or PTC sensor line. |
| 17 | PB5 | bidirectional | Port B bit 5 is a bidirectional I/O pin with internal pull-up, also usable as SPI0 clock SCK0, USART1 clock XCK1, or PTC sensor line. |
| 18 | AVCC | power_in | Supply voltage pin for the A/D converter, PC[3:0] and PE[3:2], which should be connected to VCC even if the ADC is not used. |
| 19 | PE2 | bidirectional | Port E bit 2 is a bidirectional I/O pin with internal pull-up, also usable as ADC analog input channel 6, Timer 3 input capture ICP3, SPI1 slave select SS1, or PTC sensor line. |
| 20 | AREF | passive | Analog reference pin for the A/D converter. |
| 21 | GND | power_in | Ground. |
| 22 | PE3 | bidirectional | Port E bit 3 is a bidirectional I/O pin with internal pull-up, also usable as ADC analog input channel 7, Timer/Counter3 external clock T3, SPI1 MOSI, or PTC sensor line. |
| 23 | PC0 | bidirectional | Port C bit 0 is a bidirectional I/O pin with internal pull-up, also usable as ADC analog input channel 0, SPI1 MISO, or PTC sensor line. |
| 24 | PC1 | bidirectional | Port C bit 1 is a bidirectional I/O pin with internal pull-up, also usable as ADC analog input channel 1, SPI1 clock SCK1, or PTC sensor line. |
| 25 | PC2 | bidirectional | Port C bit 2 is a bidirectional I/O pin with internal pull-up, also usable as ADC analog input channel 2 or PTC sensor line. |
| 26 | PC3 | bidirectional | Port C bit 3 is a bidirectional I/O pin with internal pull-up, also usable as ADC analog input channel 3 or PTC sensor line. |
| 27 | PC4 | bidirectional | Port C bit 4 is a bidirectional I/O pin with internal pull-up, also usable as ADC analog input channel 4, TWI0 data SDA0, or PTC sensor line; it uses the digital supply VCC. |
| 28 | PC5 | bidirectional | Port C bit 5 is a bidirectional I/O pin with internal pull-up, also usable as ADC analog input channel 5, TWI0 clock SCL0, or PTC sensor line; it uses the digital supply VCC. |
| 29 | PC6/RESET | input | Active-low reset input when the RSTDISBL fuse is unprogrammed; a low level longer than the minimum pulse length generates a Reset, while if the fuse is programmed it is an I/O pin with electrical characteristics differing from other Port C pins. |
| 30 | PD0 | bidirectional | Port D bit 0 is a bidirectional I/O pin with internal pull-up, also usable as Timer 3 output OC3A, USART0 receive RXD0, or PTC sensor line. |
| 31 | PD1 | bidirectional | Port D bit 1 is a bidirectional I/O pin with internal pull-up, also usable as Timer 4 output OC4A, USART0 transmit TXD0, or PTC sensor line. |
| 32 | PD2 | bidirectional | Port D bit 2 is a bidirectional I/O pin with internal pull-up, also usable as external interrupt INT0, Timer 3 output OC3B, Timer 4 output OC4B, or PTC sensor line. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-32(7x7) |
| Category | Embedded Processors & Controllers |
| 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 voltage |  | 1.8 |  | 5.5 | V | Operating voltage (ordering table power supply range for ATmega328PB-AUR) | 6 |
| Operational temperature range |  | -40 |  | 85 | °C | Industrial (-40°C to 85°C) for ATmega328PB-AUR | 6 |
| Speed grade |  | 0 |  | 4 | MHz | 1.8 - 5.5V | 2 |
| Speed grade |  | 0 |  | 10 | MHz | 2.7 - 5.5V | 2 |
| Speed grade |  | 0 |  | 20 | MHz | 4.5 - 5.5V | 2 |
| Active mode current |  |  | 0.24 |  | mA | Power Consumption at 1MHz, 1.8V, 25°C | 2 |
| Power-down mode current |  |  | 0.2 |  | μA | Power Consumption at 1MHz, 1.8V, 25°C | 2 |
| Power-save mode current |  |  | 1.3 |  | μA | Power Consumption at 1MHz, 1.8V, 25°C; including 32kHz RTC | 2 |

## CAD (KiCad official)

- Symbol: `ATMEGA328PB-AUR`
- Footprint: `Package_QFP:TQFP-32_7x7mm_P0.8mm`
- 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files: `atmega328pb-aur-etched.step` / `atmega328pb-aur-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `atmega328pb-aur.step` / `atmega328pb-aur.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Microchip Tech datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/40001907A.pdf) (17 pp, sha256 `6df6f6640dfc31f3`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `off` (skipped (clean text read)), 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).

[Datasheet PDF](docs/atmega328pb-aur-datasheet.pdf)