www.DataSheet4U.com PIC18F2420/2520/4420/4520 Dat.
Microchip Technology
PIC18LF2520 - (PIC18LF2420 - PIC18LF4520) 28/40/44-Pin Enhanced Flash Microcontrollers
www.DataSheet4U.com PIC18F2420/2520/4420/4520 Data Sheet 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology 2004.
