component
ATMEGA328P-AN
Public Made by Adomby adom
Microchip Tech Microcontrollers (MCU/MPU/SOC), TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownATMEGA328P-AN
Microchip Tech · Microcontrollers (MCU/MPU/SOC) · TQFP-32(7x7)
ATMEGA328P-AN 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 bi-directional I/O pin with internal pull-up, also usable as INT1 external interrupt 1 input, OC2B Timer/Counter2 compare output, or PCINT19. |
| 2 | PD4 | bidirectional | Port D bit 4 is a bi-directional I/O pin with internal pull-up, also usable as XCK USART external clock, T0 Timer/Counter0 external counter input, or PCINT20. |
| 3 | GND | power_in | Ground reference for the digital supply. |
| 4 | VCC | power_in | Digital supply voltage, 1.8 to 5.5 V operating range. |
| 5 | GND | power_in | Ground reference for the digital supply. |
| 6 | VCC | power_in | Digital supply voltage, 1.8 to 5.5 V operating range. |
| 7 | PB6 | bidirectional | Port B bit 6 is used as XTAL1 chip clock oscillator input or external clock input (or TOSC1 / PCINT6) depending on fuse settings, and cannot be used as an I/O pin when used as a clock pin. |
| 8 | PB7 | bidirectional | Port B bit 7 is used as XTAL2 inverting oscillator amplifier output (or TOSC2 / PCINT7) depending on fuse settings, and cannot be used as an I/O pin when used as a clock pin. |
| 9 | PD5 | bidirectional | Port D bit 5 is a bi-directional I/O pin with internal pull-up, also usable as T1 Timer/Counter1 external counter input, OC0B output, or PCINT21. |
| 10 | PD6 | bidirectional | Port D bit 6 is a bi-directional I/O pin with internal pull-up, also usable as AIN0 analog comparator positive input, OC0A output, or PCINT22. |
| 11 | PD7 | bidirectional | Port D bit 7 is a bi-directional I/O pin with internal pull-up, also usable as AIN1 analog comparator negative input or PCINT23; disable its pull-up when used as comparator input. |
| 12 | PB0 | bidirectional | Port B bit 0 is a bi-directional I/O pin with internal pull-up, also usable as ICP1 input capture, CLKO divided system clock output, or PCINT0. |
| 13 | PB1 | bidirectional | Port B bit 1 is a bi-directional I/O pin with internal pull-up, also usable as OC1A Timer/Counter1 compare output or PCINT1. |
| 14 | PB2 | bidirectional | Port B bit 2 is a bi-directional I/O pin with internal pull-up, also usable as SS SPI slave select, OC1B Timer/Counter1 compare output, or PCINT2. |
| 15 | PB3 | bidirectional | Port B bit 3 is a bi-directional I/O pin with internal pull-up, also usable as MOSI SPI data line, OC2A Timer/Counter2 compare output, or PCINT3. |
| 16 | PB4 | bidirectional | Port B bit 4 is a bi-directional I/O pin with internal pull-up, also usable as MISO SPI data line or PCINT4. |
| 17 | PB5 | bidirectional | Port B bit 5 is a bi-directional I/O pin with internal pull-up, also usable as SCK SPI clock or PCINT5. |
| 18 | AVCC | power_in | Supply voltage pin for the A/D converter, PC3:0 and ADC7:6; it should be connected to VCC even if the ADC is unused, and through a low-pass filter if the ADC is used. |
| 19 | ADC6 | input | Analog input channel 6 of the 10-bit A/D converter, available in the TQFP and VQFN packages only and powered from the analog supply. |
| 20 | AREF | input | Analog reference pin for the A/D converter. |
| 21 | GND | power_in | Ground reference for the digital supply. |
| 22 | ADC7 | input | Analog input channel 7 of the 10-bit A/D converter, available in the TQFP and VQFN packages only and powered from the analog supply. |
| 23 | PC0 | bidirectional | Port C bit 0 is a 7-bit I/O pin group member with internal pull-up, also usable as ADC0 analog input (analog power) or PCINT8. |
| 24 | PC1 | bidirectional | Port C bit 1 is an I/O pin with internal pull-up, also usable as ADC1 analog input (analog power) or PCINT9. |
| 25 | PC2 | bidirectional | Port C bit 2 is an I/O pin with internal pull-up, also usable as ADC2 analog input (analog power) or PCINT10. |
| 26 | PC3 | bidirectional | Port C bit 3 is an I/O pin with internal pull-up, also usable as ADC3 analog input (analog power) or PCINT11. |
| 27 | PC4 | bidirectional | Port C bit 4 is an I/O pin with internal pull-up, also usable as SDA 2-wire serial data, ADC4 analog input (digital power), or PCINT12. |
| 28 | PC5 | bidirectional | Port C bit 5 is an I/O pin with internal pull-up, also usable as SCL 2-wire serial clock, ADC5 analog input (digital power), or PCINT13. |
| 29 | PC6 | input | Reset input when the RSTDISBL fuse is unprogrammed; a low level longer than the minimum pulse length (Table 29-11) generates a reset, and shorter pulses are not ensured to reset the device. |
| 30 | PD0 | bidirectional | Port D bit 0 is a bi-directional I/O pin with internal pull-up, also usable as RXD USART receive data input or PCINT16. |
| 31 | PD1 | bidirectional | Port D bit 1 is a bi-directional I/O pin with internal pull-up, also usable as TXD USART transmit data output or PCINT17. |
| 32 | PD2 | bidirectional | Port D bit 2 is a bi-directional I/O pin with internal pull-up, also usable as INT0 external interrupt 0 input or PCINT18. |
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 Temperature | -55 | 125 | °C | 308 | |||
| Storage Temperature | -65 | 150 | °C | 308 | |||
| Voltage on RESET with respect to Ground | -0.5 | 13 | V | 308 | |||
| Voltage on any pin except RESET with respect to Ground | -0.5 | V | Printed as -0.5V to VCC+0.5V; upper limit is VCC-dependent, left null | 308 | |||
| DC Current per I/O Pin | 40 | mA | 308 | ||||
| DC Current VCC and GND Pins | 200 | mA | 308 | ||||
| Power Supply (operating range) | VCC | 1.8 | 5.5 | V | ATmega328P-AN, Industrial (-40°C to 105°C) per ordering table | 635 | |
| Speed Grade | 20 | MHz | ATmega328P-AN ordering table speed; maximum frequency depends on VCC per Figure 29-1 | 635 |
CAD (KiCad official)
- Symbol:
ATMEGA328P-AN - Footprint:
Package_QFP:TQFP-32_7x7mm_P0.8mm - 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files:
atmega328p-an-etched.step/atmega328p-an-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atmega328p-an.step/atmega328p-an.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (653 pp, sha256
7699c7d2d6d12492, retrieved 2026-10-21, 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).