PIC18F2520 PIC18F2520-1/ML PIC18F2520-1/SO PIC18F2520A-I/SO PIC18F2520-E/ML PIC18F2520-E/ML- PIC18F2520-E/ML^ PIC18F2520-E/ML` PIC18F2520-E/ML= PIC18F2520-E/SO