
2009 Microchip Technology Inc.
DS39755C-page 11
PIC18F2423/2523/4423/4523
TABLE 1-1:
DEVICE FEATURES
Features
PIC18F2423
PIC18F2523
PIC18F4423
PIC18F4523
Operating Frequency
DC – 40 MHz
Program Memory (Bytes)
16,384
32,768
16,384
32,768
Program Memory (Instructions)
8,192
16,384
8,192
16,384
Data Memory (Bytes)
768
1,536
768
1,536
Data EEPROM Memory (Bytes)
256
Interrupt Sources
19
20
I/O Ports
Ports A, B, C, (E)
Ports A, B, C, D, E
Timers
4
Capture/Compare/PWM Modules
2
1
Enhanced
Capture/Compare/PWM Modules
00
11
Serial Communications
MSSP,
Enhanced USART
MSSP,
Enhanced USART
MSSP,
Enhanced USART
MSSP,
Enhanced USART
Parallel Communications (PSP)
No
Yes
12-Bit Analog-to-Digital Module
10 Input Channels
13 Input Channels
Resets (and Delays)
POR, BOR,
RESET Instruction,
Stack Full, Stack
Underflow (PWRT, OST),
MCLR (optional), WDT
POR, BOR,
RESET Instruction,
Stack Full, Stack
Underflow (PWRT, OST),
MCLR (optional), WDT
POR, BOR,
RESET Instruction,
Stack Full, Stack
Underflow (PWRT, OST),
MCLR (optional), WDT
POR, BOR,
RESET Instruction,
Stack Full, Stack
Underflow (PWRT, OST),
MCLR (optional), WDT
Programmable
High/Low-Voltage Detect
Yes
Programmable Brown-out Reset
Yes
Instruction Set
75 Instructions;
83 with Extended
Instruction Set enabled
75 Instructions;
83 with Extended
Instruction Set enabled
75 Instructions;
83 with Extended
Instruction Set enabled
75 Instructions;
83 with Extended
Instruction Set enabled
Packages
28-Pin PDIP
28-Pin SOIC
28-Pin QFN
28-Pin PDIP
28-Pin SOIC
28-Pin QFN
40-Pin PDIP
44-Pin QFN
44-Pin TQFP
40-Pin PDIP
44-Pin QFN
44-Pin TQFP