PIC18F4455-I/P is a high performance PIC18 family 8 -bit powerful (200 nanoseconds command execution) yet easy to program CMOS flash based Microcontroller combines powerful PIC®(RISC) architecture with up to 16 MIPS processing power. This product offers all the advantages of the well-known high-performance x16 architecture with standardized features including 24 kB addressable program memory size, 2048 bytes data memory size, 35 general-purpose I/O pins, two comparators and 10-channel 13-channel. bit analog to digital (A/D) converter. This device operates at a maximum wide operating voltage frequency of 48MHz from 2 to 5.5V.