PIC18FXX2 Data Sheet High-Performance, Enhanced Fl.
PIC18F2525 - Enhanced Flash Microcontroller
PIC18F252 - High Performance / Enhanced Flash Microcontroller
18F252 - PIC18F252
PIC18F2520 - 28/40/44-Pin Enhanced Flash Microcontrollers
PIC18F2523 - (PIC18Fxx23) Enhanced Flash Microcontrollers