
2009 Microchip Technology Inc.
DS39755C-page 45
PIC18F2423/2523/4423/4523
APPENDIX A: REVISION HISTORY
Revision A (June 2006)
Original data sheet for PIC18F2423/2523/4423/4523
devices.
Revision B (January 2007)
This revision includes updates to the packaging
diagrams.
Revision C (September 2009)
Electrical specifications updated. Preliminary condition
status removed. Converted document to the “mini data
sheet” format.
APPENDIX B: DEVICE
DIFFERENCES
The differences between the devices listed in this data
TABLE B-1:
DEVICE DIFFERENCES
Features
PIC18F2423
PIC18F2523
PIC18F4423
PIC18F4523
Program Memory (Bytes)
16384
32768
16384
32768
Program Memory (Instructions)
8192
16384
8192
16384
Interrupt Sources
19
20
I/O Ports
Ports A, B, C, (E)
Ports A, B, C, D, E
Capture/Compare/PWM Modules
2
1
Enhanced
Capture/Compare/PWM Modules
00
1
Parallel Communications (PSP)
No
Yes
12-Bit Analog-to-Digital Module
10 Input Channels 10 Input Channels
13 Input Channels
Packages
28-Pin PDIP
28-Pin SOIC
28-Pin QFN
28-Pin PDIP
28-Pin SOIC
28-Pin QFN
40-Pin PDIP
44-Pin TQFP
44-Pin QFN
40-Pin PDIP
44-Pin TQFP
44-Pin QFN