8-bit AVR microcontroller featuring 32KB FLASH memory and 2KB RAM. Operates at up to 20MHz with an 8-bit data bus. Offers 23 I/Os, 8 ADC channels, 6 PWM channels, and multiple communication interfaces including I2C, SPI, and UART. Supports a supply voltage range of 1.8V to 5.5V and operates between -40°C and 85°C. Surface mountable in a 5.1mm x 5.1mm x 1mm VQFN package.
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Microchip ATMEGA328-MU technical specifications.
| Package/Case | VQFN |
| Core Architecture | AVR |
| Data Bus Width | 8b |
| Frequency | 20MHz |
| Height | 1mm |
| Interface | I2C, SPI, UART, USART |
| Length | 5.1mm |
| Max Frequency | 20MHz |
| Max Operating Temperature | 85°C |
| Max Supply Voltage | 5.5V |
| Memory Size | 32KB |
| Memory Type | FLASH, |
| Min Operating Temperature | -40°C |
| Min Supply Voltage | 1.8V |
| Mount | Surface Mount |
| Number of ADC Channels | 8 |
| Number of I/Os | 23 |
| Number of I2C Channels | 1 |
| Number of PWM Channels | 6 |
| Number of SPI Channels | 1 |
| Number of Timers/Counters | 3 |
| Number of USB Channels | 1 |
| Oscillator Type | Internal |
| Packaging | Tray |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| RAM Size | 2KB |
| Reach SVHC Compliant | No |
| RoHS Compliant | Yes |
| Series | AVR® ATmega |
| Width | 5.1mm |
| RoHS | Compliant |
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