The PIC16F818-I/SO is a baseline PIC16 family 8-bit powerful (200 nanosecond instruction execution) yet easy-to-program CMOS flash based Microcontroller packs powerful PIC®(RISC) architecture. This product utilize a 12-bit program word and provide the right amount of features including 1.75kB of addressable program memory size, 128bytes of data memory size, 16 general-purpose I/O pins and 5-channel 10-bit analog-to-digital (A/D) converter. This device operates at a maximum frequency of 20MHz with wide operating voltage of 2 to 5.5V.