Philips Semiconductors
Product specification
Remote 8-bit I/O expander for I
2
C-bus
5.2
SSOP20 package
SYMBOL
INT
SCL
n.c.
SDA
V
DD
A0
A1
n.c.
A2
P0
P1
P2
n.c.
P3
V
SS
P4
P5
n.c.
P6
P7
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
interrupt output (active LOW)
serial clock line
not connected
serial data line
supply voltage
address input 0
address input 1
not connected
address input 2
quasi-bidirectional I/O 0
quasi-bidirectional I/O 1
quasi-bidirectional I/O 2
not connected
quasi-bidirectional I/O 3
supply ground
quasi-bidirectional I/O 4
quasi-bidirectional I/O 5
not connected
quasi-bidirectional I/O 6
quasi-bidirectional I/O 7
DESCRIPTION
PCF8574
handbook, halfpage
INT 1
SCL 2
n.c. 3
SDA 4
VDD 5
20 P7
19 P6
18 n.c.
17 P5
16 P4
PCF8574TS
PCF8574ATS
15 VSS
A0 6
A1 7
14 P3
13 n.c.
12 P2
11 P1
MBD978
n.c. 8
A2
9
P0 10
Fig.4 Pin configuration (SSOP20).
2002 Nov 22
6
PHILIPS [ NXP SEMICONDUCTORS ]
