Schematics

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
SEQUENTMICROSYSTEMS.COM
IO EXPANDER 1.1
4 RELAYS-PLUS
A
4 5Wednesday, February 17, 2021
Title
Size Document Number Rev
Date: Sheet of
IN0
IN1
IN3
IN2
A0
A1
P6
P7
P5
P4
A2
RASP_RX
RASP_RX0
J2
1
4 2
3 56 78
C1
.22uF
R1
15K
R3
15K
R2
15K
U1
TCA9534
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
A0
A1
A2
P0
P1
P2
P3
VSS P4
P5
P6
P7
INT
SCL
SDA
VDD
+5V
SDA
SCL
GND
P[4-7]IN[0-3]
RASP_RX
RASP_RX0