Datasheet

© 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 DC – 40 MHz DC – 40 MHz 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) 256 256 256 256
Interrupt Sources 19 19 20 20
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
Timers 4 4 4 4
Capture/Compare/PWM Modules 2 2 1 1
Enhanced
Capture/Compare/PWM Modules
0011
Serial Communications MSSP,
Enhanced USART
MSSP,
Enhanced USART
MSSP,
Enhanced USART
MSSP,
Enhanced USART
Parallel Communications (PSP) No No Yes Yes
12-Bit Analog-to-Digital Module 10 Input Channels 10 Input Channels 13 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 Yes Ye s Yes
Programmable Brown-out Reset Yes Yes Yes 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