2010
Micr
ochip
T
e
ch
nol
ogy
I
n
c.
DS4
1303G
-page
13
PIC18F2XK20/4XK20
TABLE 1-1:
DEVICE FEATURES
Features
PIC18F23K20
PIC18F24K20
PIC18F25K20
PIC18F26K20
PIC18F43K20
PIC18F44K20
PIC18F45K20
PIC18F46K20
Operating Frequency(2)
DC – 64 MHz
Program Memory (Bytes)
8192
16384
32768
65536
8192
16384
32768
65536
Program Memory
(Instructions)
4096
8192
16384
32768
4096
8192
16384
32768
Data Memory (Bytes)
512
768
1536
3936
512
768
1536
3936
Data EEPROM Memory
(Bytes)
256
1024
256
1024
Interrupt Sources
19
20
I/O Ports
A, B, C, (E)(1)
A, B, C, D, E
Timers
4
44
Capture/Compare/PWM
Modules
111
1
Enhanced Capture/
Compare/PWM Modules
1
11
Serial Communications
MSSP, Enhanced
USART
MSSP, Enhanced
USART
MSSP, Enhanced
USART
MSSP, Enhanced
USART
MSSP, Enhanced
USART
MSSP, Enhanced
USART
MSSP, Enhanced
USART
MSSP, Enhanced
USART
Parallel Communica-
tions (PSP)
No
Yes
10-bit Analog-to-Digital
Module
1 internal plus 10
Input Channels
1 internal plus 10
Input Channels
1 internal plus 10
Input Channels
1 internal plus 10
Input Channels
1 internal plus 13
Input Channels
1 internal plus 13
Input Channels
1 internal plus 13
Input Channels
1 internal plus 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
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
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 SSOP
28-pin UQFN
28-pin PDIP
28-pin SOIC
28-pin QFN
28-pin SSOP
28-pin PDIP
28-pin SOIC
28-pin QFN
28-pin SSOP
28-pin PDIP
28-pin SOIC
28-pin QFN
28-pin SSOP
40-pin PDIP
44-pin QFN
44-pin TQFP
40-pin PDIP
44-pin QFN
44-pin TQFP
40-pin PDIP
44-pin QFN
44-pin TQFP
40-pin PDIP
44-pin QFN
44-pin TQFP
Note
1:
PORTE contains the single RE3 read-only bit. The LATE and TRISE registers are not implemented.
2:
Frequency range shown applies to industrial range devices only. Maximum frequency for extended range devices is 48 MHz.
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