The PIC18F25K40-I/SS is an 8-bit microcontroller unit (MCU) by Microchip Technology. It features a powerful and efficient PIC RISC architecture, making it suitable for a wide range of applications. With a flash memory capacity of 32KB, this MCU offers ample space for program code storage. It operates at both 3.3V and 5V power supply levels, enhancing its versatility. The MCU comes in a compact 28-pin SSOP package presented in a tube for easy handling and storage.