PCA9655E Datasheet, PDF (3/20 Pages) ON Semiconductor – Remote 16-bit I/O Expander

PCA9655E
PIN ASSIGNMENT
INT 1
AD1 2
AD2 3
IO0_0 4
IO0_1 5
IO0_2 6
IO0_3 7
IO0_4 8
IO0_5 9
IO0_6 10
IO0_7 11
V_SS 12
PCA9655E
24 V_DD
23 SDA
22 SCL
21 AD0
20 IO1_7
19 IO1_6
18 IO1_5
17 IO1_4
16 IO1_3
15 IO1_2
14 IO1_1
13 IO1_0
Figure 3. SOIC24 / TSSOP24
terminal 1
index area
IO0_0 1
IO0_1 2
IO0_2 3
IO0_3 4
IO0_4 5
IO0_5 6
PCA9655E
18 AD0
17 IO1_7
16 IO1_6
15 IO1_5
14 IO1_4
13 IO1_3
Transparent top view
(The exposed thermal pad at the bottom
is not connected to internal circuitry)
Figure 4. WQFN24
Table 1. PIN DESCRIPTIONS
Pin
Symbol
INT
SOIC24, TSSOP24
1
AD1
2
AD2
3
IO0_0
4
IO0_1
5
IO0_2
6
IO0_3
7
IO0_4
8
IO0_5
9
IO0_6
10
IO0_7
11
V_SS
12
IO1_0
13
IO1_1
14
IO1_2
15
IO1_3
16
IO1_4
17
IO1_5
18
IO1_6
19
IO1_7
20
AD0
21
SCL
22
SDA
23
V_DD
24
WQFN24
22
23
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Description
Interrupt Output (active−LOW)
Address Input 1
Address Input 2
Port 0 I/O 0
Port 0 I/O 1
Port 0 I/O 2
Port 0 I/O 3
Port 0 I/O 4
Port 0 I/O 5
Port 0 I/O 6
Port 0 I/O 7
Supply Ground
Port 1 I/O 0
Port 1 I/O 1
Port 1 I/O 2
Port 1 I/O 3
Port 1 I/O 4
Port 1 I/O 5
Port 1 I/O 6
Port 1 I/O 7
Address Input 0
Serial Clock Line
Serial Data Line
Supply Voltage
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