PIC18F2420/2520/4420/4520
Pin Diagrams
28-Pin SPDIP, SOIC
1
2
3
4
5
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RB7/KBI3/PGD
RB6//KBI2/PGC
RB5/KBI1/PGM
RB4/KBI0/AN11
RB3/AN9/CCP2(1)
RB2/INT2/AN8
RB1/INT1/AN10
MCLR/VPP/RE3
RA0/AN0
RA1/AN1
RA2/AN2/VREF-/CVREF
RA3/AN3/VREF+
RA4/T0CKI/C1OUT
RA5/AN4/SS/HLVDIN/C2OUT
VSS
6
7
8
RB0/INT0/FLT0/AN12
VDD
9
OSC1/CLKI/RA7
OSC2/CLKO/RA6
RC0/T1OSO/T13CKI
RC1/T1OSI/CCP2(1)
RC2/CCP1
VSS
10
11
RC7/RX/DT
RC6/TX/CK
RC5/SDO
RC4/SDI/SDA
12
13
14
RC3/SCK/SCL
28-Pin QFN
28272625242322
RB3/AN9/CCP2(1)
RB2/INT2/AN8
RB1/INT1/AN10
RB0/INT0/FLT0/AN12
VDD
RA2/AN2/VREF-/CVREF
RA3/AN3/VREF+
RA4/T0CKI/C1OUT
RA5/AN4/SS/HLVDIN/C2OUT
VSS
1
2
3
4
5
6
7
21
20
19
18
17
16
15
PIC18F2420
PIC18F2520
OSC1/CLKI/RA7
OSC2/CLKO/RA6
VSS
RC7/RX/DT
8
9 1011 121314
40-Pin PDIP
MCLR/VPP/RE3
RA0/AN0
1
2
3
4
5
6
7
8
RB7/KBI3/PGD
RB6/KBI2/PGC
RB5/KBI1/PGM
RB4/KBI0/AN11
RB3/AN9/CCP2(1)
RB2/INT2/AN8
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
RA1/AN1
RA2/AN2/VREF-/CVREF
RA3/AN3/VREF+
RA4/T0CKI/C1OUT
RA5/AN4/SS/HLVDIN/C2OUT
RE0/RD/AN5
RB1/INT1/AN10
RB0/INT0/FLT0/AN12
VDD
VSS
RE1/WR/AN6
RE2/CS/AN7
9
10
11
12
13
14
15
16
17
18
19
20
VDD
VSS
RD7/PSP7/P1D
RD6/PSP6/P1C
RD5/PSP5/P1B
RD4/PSP4
RC7/RX/DT
RC6/TX/CK
RC5/SDO
OSC1/CLKI/RA7
OSC2/CLKO/RA6
RC0/T1OSO/T13CKI
RC1/T1OSI/CCP2(1)
RC2/CCP1/P1A
RC3/SCK/SCL
RD0/PSP0
RC4/SDI/SDA
RD3/PSP3
RD1/PSP1
RD2/PSP2
Note 1: RB3 is the alternate pin for CCP2 multiplexing.
DS39631E-page 2
© 2008 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
