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SX20AC/SX28AC
2.0 CONNECTION DIAGRAMS
2.1 Pin Assignments
2.2 Pin Descriptions
SSOP
1
2
3
4
5
6
7
8
16
15
RC4
RC3
RB6
RB5
SX28AC/SS
OSC2
RC7
RC6
RC5
V
dd
V
dd
RA2
RA3
RB0
RB1
RB2
RB3
RB4
Vss
MCLR
OSC1
RC2
RC1
RC0
RB7
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
Vss
RTCC
RA0
RA1
1
2
3
4
5
6
7
8
16
15
RC4
RC3
RB6
RB5
SX28AC/DP
OSC2
RC7
RC6
RC5
n.c.
Vss
RA2
RA3
RB0
RB1
RB2
RB3
RB4
MCLR
OSC1
RC2
RC1
RC0
RB7
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
RTCC
V
dd
RA0
RA1
n.c.
DIP
1
2
3
4
5
6
7
8
16
15
RB5
RB4
SX20AC/SS
OSC2
RTCC
RA0
RB0
RB1
RB2
RB3
MCLR
OSC1
V
dd
V
dd
RB7
RB6
9
10
14
13
12
11
20
19
18
17
RA2
RA3
Vss
RA1
Vss
SSOP
& SX28AC/SSU
Name
Pin Type Input Levels
Description
RA0
I/O
TTL/CMOS
Bidirectional I/O Pin; symmetrical source / sink capability
RA1
I/O
TTL/CMOS
Bidirectional I/O Pin; symmetrical source / sink capability
RA2
I/O
TTL/CMOS
Bidirectional I/O Pin; symmetrical source / sink capability
RA3
I/O
TTL/CMOS
Bidirectional I/O Pin; symmetrical source / sink capability
RB0
I/O
TTL/CMOS/ST
Bidirectional I/O Pin; comparator output; MIWU/Interrupt input
RB1
I/O
TTL/CMOS/ST
Bidirectional I/O Pin; comparator negative input; MIWU/Interrupt input
RB2
I/O
TTL/CMOS/ST
Bidirectional I/O Pin; comparator positive input; MIWU/Interrupt input
RB3
I/O
TTL/CMOS/ST
Bidirectional I/O Pin; MIWU/Interrupt input
RB4
I/O
TTL/CMOS/ST
Bidirectional I/O Pin; MIWU/Interrupt input
RB5
I/O
TTL/CMOS/ST
Bidirectional I/O Pin; MIWU/Interrupt input
RB6
I/O
TTL/CMOS/ST
Bidirectional I/O Pin; MIWU/Interrupt input
RB7
I/O
TTL/CMOS/ST
Bidirectional I/O Pin; MIWU/Interrupt input
RC0
I/O
TTL/CMOS/ST
Bidirectional I/O pin
RC1
I/O
TTL/CMOS/ST
Bidirectional I/O pin
RC2
I/O
TTL/CMOS/ST
Bidirectional I/O pin
RC3
I/O
TTL/CMOS/ST
Bidirectional I/O pin
RC4
I/O
TTL/CMOS/ST
Bidirectional I/O pin
RC5
I/O
TTL/CMOS/ST
Bidirectional I/O pin
RC6
I/O
TTL/CMOS/ST
Bidirectional I/O pin
RC7
I/O
TTL/CMOS/ST
Bidirectional I/O pin
RTCC
I
ST
Input to Real-Time Clock/Counter
MCLR
I
ST
Master Clear reset input active low
OSC1
I
ST
Crystal oscillator input external clock source input
OSC2
O
CMOS
Crystal oscillator output in R/C mode, internally pulled to V
dd
through weak
pull-up
V
dd
P
Positive supply pin
Note: I = input, O = output, I/O = Input/Output, P = Power, TTL = TTL input, CMOS = CMOS input,
ST = Schmitt Trigger input, MIWU = Multi-Input Wakeup input