ATMEGA328-MU

The ATMEGA328-MU is an 8-bit AVR microcontroller based on the advanced RISC architecture, delivering up to 20 MIPS throughput at 20MHz. It features 32KB of in-system self-programmable Flash program memory, 2KB internal SRAM, and 1KB EEPROM with high endurance (10,000 Flash write/erase cycles and 100,000 EEPROM cycles). Data retention is rated at 20 years at 85°C and 100 years at 25°C.

Peripheral features include two 8-bit timers, one 16-bit timer, six PWM channels, an 8-channel 10-bit ADC, analog comparator, and a real-time counter with separate oscillator. Connectivity options include I²C, SPI, and USART interfaces. The device operates over a supply voltage range of 1.8V to 5.5V and a temperature range of -40°C to 85°C.

The microcontroller is available in a 32-VFQFN exposed pad package (32-VQFN 5x5mm) for surface mount assembly. It supports internal oscillator and includes brown-out detection, power-on reset, and watchdog timer. Typical power consumption is 0.2mA in active mode at 1MHz/1.8V and 0.1µA in power-down mode, making it suitable for low-power embedded applications.