The ATMEGA328P-AU from Microchip is a robust, low-power 8-bit AVR RISC microcontroller. It features 32 kB of in-system programmable Flash memory, 2 kB SRAM, and 1 kB EEPROM - excellent for embedded applications. Operating from 1.8 V to 5.5 V and reaching clock speeds up to 20 MHz, it offers flexibility across power and performance needs
In a compact 32-pin TQFP surface-mount package, it supports 23 general-purpose I/O pins along with communication interfaces I²C, SPI, USART and includes features like ADC (10-bit, 8 channels), three timers, and an 8-bit data bus. Rated for industrial temperature ranges (-40 °C to +85 °C) and packaged in tray form (Moisture Sensitive), it’s ideal for professional and industrial-grade electronics.
Built around the efficient AVR core, it delivers real-read-while-write EEPROM capabilities, programming lock features, and optional bootloader support - making it a standout for reliable, high-performance microcontroller applications.
| Parameter |
Value |
| Core |
AVR (8-bit) |
| Program Memory |
32 kB Flash |
| Data RAM |
2 kB SRAM |
| Data ROM (EEPROM) |
1 kB EEPROM |
| Max Clock Frequency |
20 MHz |
| Supply Voltage Range |
1.8 V – 5.5 V |
| ADC |
10-bit, 8 Channels |
| Timers |
3 (two 8-bit, one 16-bit) |
| Communication Interfaces |
I²C, SPI, USART |
| I/O Pins |
23 |
| Package |
TQFP-32 (SMD/SMT) |
| Temperature Range |
−40 °C to +85 °C |
| Packaging |
Tray |
| Series/Family |
ATmega328P (megaAVR) |
Q: What is the ATMEGA328P-AU microcontroller?
A: The ATMEGA328P-AU is an 8-bit AVR microcontroller from Microchip featuring 32 KB Flash memory in a TQFP-32 package.
Q: What package type does the ATMEGA328P-AU use?
A: It is available in a TQFP-32 (Thin Quad Flat Package) surface-mount package.
Q: Is the ATMEGA328P-AU compatible with Arduino projects?
A: Yes, it is widely used in Arduino-compatible boards and custom embedded projects.
Q: How much Flash memory is available in the ATMEGA328P-AU?
A: The microcontroller provides 32 KB of Flash memory for storing program code.
Q: What operating voltage range does the ATMEGA328P-AU support?
A: It supports an operating voltage range of approximately 1.8V to 5.5V.
Q: Which communication interfaces are supported by the ATMEGA328P-AU?
A: It supports UART, SPI, and I²C (TWI) communication interfaces.
Q: What are the common applications of the ATMEGA328P-AU?
A: Common applications include embedded systems, robotics, IoT devices, automation, and sensor-based projects.
Q: Can the ATMEGA328P-AU be programmed using ISP (In-System Programming)?
A: Yes, it supports ISP, allowing programming and firmware updates directly on the target PCB.
