Philips Semiconductors
Product data sheet
16-bit I
2
C and SMBus I/O port with interrupt
PCA9555
PIN CONFIGURATION — DIP, SO, SSOP, TSSOP
INT 1
A1
A2
I/O0.0
I/O0.1
I/O0.2
I/O0.3
I/O0.4
I/O0.5
2
3
4
5
6
7
8
9
24 V
DD
23 SDA
22 SCL
21 A0
20 I/O1.7
19 I/O1.6
18 I/O1.5
17 I/O1.4
16 I/O1.3
15 I/O1.2
14 I/O1.1
13 I/O1.0
PIN CONFIGURATION — HVQFN
21 VDD
20 SDA
19 SCL
18 A0
17 I/O1.7
16 I/O1.6
15 I/O1.5
14 I/O1.4
13 I/O1.3
I/O1.2 12
I/O1.0 10
I/O1.1 11
7
8
I/O0.7
9
VSS
22 INT
24 A2
I/O0.0
I/O0.1
I/O0.2
I/O0.3
I/O0.4
I/O0.5
1
2
3
4
5
6
I/O0.6
23 A1
I/O0.6 10
I/O0.7 11
V
SS
12
TOP VIEW
su01438
su01683
Figure 1. Pin configuration — DIP, SO, SSOP, TSSOP
Figure 2. Pin configuration — HVQFN
PIN DESCRIPTION
PIN NUMBER
DIP, SO, SSOP, TSSOP
1
2
3
4–11
12
13–20
21
22
23
24
HVQFN
22
23
24
1–8
9
10–17
18
19
20
21
SYMBOL
INT
A1
A2
I/O0.0–I/O0.7
V
SS
I/O1.0–I/O1.7
A0
SCL
SDA
V
DD
Interrupt output (open-drain)
Address input 1
Address input 2
I/O0.0 to I/O0.7
Supply ground
I/O1.0 to I/O1.7
Address input 0
Serial clock line
Serial data line
Supply voltage
FUNCTION
2004 Sep 30
3
PHILIPS [ NXP SEMICONDUCTORS ]
