PIC18F2520-I-SO PIC18F2520T-E/ML PIC18F2520T-E/SO PIC18F2520T-E/SS PIC18F2520T-I/ML PIC18F2520T-I/SO PIC18F2520T-I/SOG PIC18F2520T-I/SS PIC18F2523-E/ML PIC18F2523-E/SO