PIC18F2420/2520/4420/4520
APPENDIX A: REVISION HISTORY
APPENDIX B: DEVICE
DIFFERENCES
Revision A (June 2004)
The differences between the devices listed in this data
sheet are shown in Table B-1.
Original data sheet for PIC18F2420/2520/4420/4520
devices.
Revision B (January 2007)
This revision includes updates to the packaging
diagrams.
Revision C (June 2007)
This revision includes updates to Section 6.0 “Flash
Program Memory”, Section 23.0 “Special Features
of the CPU”, Section 26.0 “Electrical Characteris-
tics” and minor corrections applicable to Timer1,
EUSART and the packaging diagrams. Also added the
125°C specifications.
Revision D (July 2007)
This revision updated the extended temperature
information in Section 26.0 “Electrical Characteris-
tics”.
Revision E (October 2008)
This revision updated Section 26.0 “Electrical Charac-
teristics”, Section 27.0 “DC and AC Characteristics
Graphs and Tables” and Section 28.0 “Packaging
Information”.
TABLE B-1:
DEVICE DIFFERENCES
Features
PIC18F2420
PIC18F2520
PIC18F4420
PIC18F4520
16384
32768
16384
19
16384
8192
20
32768
16384
20
Program Memory (Bytes)
Program Memory (Instructions)
Interrupt Sources
8192
19
I/O Ports
Ports A, B, C, (E)
Ports A, B, C, (E) Ports A, B, C, D, E Ports A, B, C, D, E
Capture/Compare/PWM Modules
2
0
2
0
1
1
1
1
Enhanced
Capture/Compare/PWM Modules
Parallel Communications (PSP)
10-Bit Analog-to-Digital Module
Packages
No
No
Yes
Yes
10 Input Channels 10 Input Channels 13 Input Channels
13 Input Channels
28-Pin SPDIP
28-Pin SOIC
28-Pin QFN
28-Pin SPDIP
28-Pin SOIC
28-Pin QFN
40-Pin PDIP
44-Pin TQFP
44-Pin QFN
40-Pin PDIP
44-Pin TQFP
44-Pin QFN
© 2008 Microchip Technology Inc.
DS39631E-page 395
MICROCHIP [ MICROCHIP ]
