Schematics

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
SEQUENTMICROSYSTEMS.COM
IO EXPANDER 3.1
16 INPUTS
A
4 6Saturday, February 13, 2021
Title
Size Document Number Rev
Date: Sheet of
ZERO
ONE
TWO
IN4
IN3
IN2
IN1
IN8
IN7
IN6
IN5
IN12
IN11
IN10
IN9
IN13
IN14
IN15
IN16
RASP_RX0
RASP_RX
C1
.22uF
R9
10K
J2
1
4 2
3 56 78
R40
10K
U1
PCA9535
12
21
22
23
1
3
24
2
4
5
6
7
8
9
10
11
13
14
15
16
17
18
19
20
GND
A0
SCL
SDA
INTN
A2
VCC
A1
IO0_0
IO0_1
IO0_2
IO0_3
IO0_4
IO0_5
IO0_6
IO0_7
IO1_0
IO1_1
IO1_2
IO1_3
IO1_4
IO1_5
IO1_6
IO1_7
R41
10K
R42
10K
SCL
SDA
+5V
GND
INTN
IN[1:16]
RASP_RX
RASP_RX0