Philips Semiconductors
Product specification
Remote 8-bit I/O expander for I
2
C-bus
5
PINNING
PIN
SYMBOL
DIP16; SO16
A0
A1
A2
P0
P1
P2
P3
V
SS
P4
P5
P6
P7
INT
SCL
SDA
V
DD
n.c.
n.c.
n.c.
n.c.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
−
−
−
−
SSOP20
6
7
9
10
11
12
14
15
16
17
19
20
1
2
4
5
3
8
13
18
address input 0
address input 1
address input 2
quasi-bidirectional I/O 0
quasi-bidirectional I/O 1
quasi-bidirectional I/O 2
quasi-bidirectional I/O 3
supply ground
quasi-bidirectional I/O 4
quasi-bidirectional I/O 5
quasi-bidirectional I/O 6
quasi-bidirectional I/O 7
interrupt output (active LOW)
serial clock line
serial data line
supply voltage
not connected
not connected
not connected
not connected
DESCRIPTION
PCF8574
handbook, halfpage
INT
handbook, halfpage
1
2
3
4
5
PCF8574TS
6
7
8
9
20
19
18
17
16
15
14
13
12
11
MBD978
P7
P6
n.c.
P5
P4
VSS
P3
n.c.
P2
P1
A0
A1
A2
P0
P1
P2
P3
VSS
1
2
3
4
5
6
7
8
MBD979
16 VDD
15
14
PCF8574
PCF8574A
13
12
SDA
SCL
INT
P7
SCL
n.c.
SDA
VDD
A0
A1
n.c.
A2
11 P6
10
9
P5
P4
P0 10
Fig.2 Pin configuration (DIP16; SO16).
Fig.3 Pin configuration (SSOP20).
1997 Apr 02
5
PHILIPS [ NXP SEMICONDUCTORS ]
