PCF8574T Datasheet
Table Of Contents
- 1 FEATURES
- 2 GENERAL DESCRIPTION
- 3 ORDERING INFORMATION
- 4 BLOCK DIAGRAM
- 5 PINNING
- 6 CHARACTERISTICS OF THE I 2 C-BUS
- 7 FUNCTIONAL DESCRIPTION
- 8 LIMITING VALUES
- 9 HANDLING
- 10 DC CHARACTERISTICS
- 11 I 2 C-BUS TIMING CHARACTERISTICS
- 12 PACKAGE OUTLINES
- 13 SOLDERING
- 14 DATA SHEET STATUS
- 15 DEFINITIONS
- 16 DISCLAIMERS
- 17 PURCHASE OF PHILIPS I 2 C COMPONENTS
2002 Nov 22 6
Philips Semiconductors Product speciļ¬cation
Remote 8-bit I/O expander for I
2
C-bus
PCF8574
5.2 SSOP20 package
SYMBOL PIN DESCRIPTION
INT 1 interrupt output (active LOW)
SCL 2 serial clock line
n.c. 3 not connected
SDA 4 serial data line
V
DD
5 supply voltage
A0 6 address input 0
A1 7 address input 1
n.c. 8 not connected
A2 9 address input 2
P0 10 quasi-bidirectional I/O 0
P1 11 quasi-bidirectional I/O 1
P2 12 quasi-bidirectional I/O 2
n.c. 13 not connected
P3 14 quasi-bidirectional I/O 3
V
SS
15 supply ground
P4 16 quasi-bidirectional I/O 4
P5 17 quasi-bidirectional I/O 5
n.c. 18 not connected
P6 19 quasi-bidirectional I/O 6
P7 20 quasi-bidirectional I/O 7
handbook, halfpage
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
INT
SCL
n.c.
SDA
V
DD
A0
A1
n.c.
A2
P0
P7
P6
n.c.
P5
V
SS
P4
P3
n.c.
P2
P1
PCF8574TS
PCF8574ATS
MBD978
Fig.4 Pin configuration (SSOP20).