ATMEGA328P-PN

The ATMEGA328P-PN is a low-power, high-performance 8-bit AVR microcontroller based on the advanced RISC architecture. It features 32KB of in-system self-programmable Flash, 2KB SRAM, and 1KB EEPROM with high endurance: 10,000 write/erase cycles for Flash and 100,000 for EEPROM. Data retention is rated at 20 years at 85°C and 100 years at 25°C.

The device operates over a supply voltage range of 1.8V to 5.5V and supports clock frequencies up to 20 MHz at 4.5V-5.5V. It includes 23 general-purpose I/O lines, a 6-channel 10-bit ADC, and multiple serial communication interfaces: I²C, SPI, and UART/USART. Peripherals include two 8-bit timers, one 16-bit timer, PWM channels, a programmable watchdog timer, and brown-out detection. The internal oscillator reduces external component count.

This microcontroller is available in a 28-pin DIP (0.300 inch width) through-hole package, making it suitable for prototyping and production. Its power consumption is optimized: 0.2 mA active at 1 MHz and 1.8V, 0.1 µA in power-down mode, and 0.75 µA in power-save mode with RTC running. The operating temperature range is -40°C to 85°C.