PIC18F2420-1/SO PIC18F2420-E/ML PIC18F2420-E/SO PIC18F2420-E/SP PIC18F2420-I/ML PIC18F2420-I/P PIC18F2420-I/PT PIC18F2420-I/SO PIC18F2420-I/SO4AP PIC18F2420-I/SOH