Datasheet

PIC16F818/819
DS39598F-page 2  2001-2013 Microchip Technology Inc.
Pin Diagrams
RA1/AN1
RA0/AN0
RA7/OSC1/CLKI
RA6/OSC2/CLKO
V
DD
RB7/T1OSI/PGD
RB6/T1OSO/T1CKI/PGC
RB5/SS
RB4/SCK/SCL
RA2/AN2/VREF-
RA3/AN3/V
REF+
RA4/AN4/T0CKI
RA5/MCLR
/VPP
VSS
RB0/INT
RB1/SDI/SDA
RB2/SDO/CCP1
RB3/CCP1/PGM
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
18-Pin PDIP, SOIC
PIC16F818/819
RA1/AN1
RA0/AN0
RA7/OSC1/CLKI
RA6/OSC2/CLKO
V
DD
RB7/T1OSI/PGD
RB6/T1OSO/T1CKI/PGC
RB5/SS
RB4/SCK/SCL
RA2/AN2/VREF-
RA3/AN3/V
REF+
RA4/AN4/T0CKI
RA5/MCLR
/VPP
VSS
RB0/INT
RB1/SDI/SDA
RB2/SDO/CCP1
RB3/CCP1/PGM
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
20-Pin SSOP
10
11
VSS
VDD
PIC16F818/819
28-Pin QFN
(1)
16
2
RA2/AN2/VREF-
RA0/AN0
RA4/AN4/T0CKI
RA5/MCLR/VPP
NC
V
SS
NC
RB0/INT
RB1/SDI/SDA
RA3/AN3/V
REF+
RA7/OSC1/CLKI
RA6/OSC2/CLKO
V
DD
NC
V
DD
RB7/T1OSI/PGD
RB6/T1OSO/T1CKI/PGC
RB5/SS
RB4/SCK/SCL
7
PIC16F818/819
1
3
6
5
4
15
21
19
20
17
18
22 28 26 27 23 24 25
14 8 10 9 13 12 11
VSS
NC
NC
RA1/AN1
RB2/SDO/CCP1
RB3/CCP1/PGM
NC NC
NC
Note 1: For the QFN package, it is recommended that the bottom pad be connected to VSS.