Data Sheet

1997 Apr 02 2
Philips Semiconductors Product specification
Remote 8-bit I/O expander for I
2
C-bus
PCF8574
CONTENTS
1 FEATURES
2 GENERAL DESCRIPTION
3 ORDERING INFORMATION
4 BLOCK DIAGRAM
5 PINNING
6 CHARACTERISTICS OF THE I
2
C-BUS
6.1 Bit transfer
6.2 Start and stop conditions
6.3 System configuration
6.4 Acknowledge
7 FUNCTIONAL DESCRIPTION
7.1 Addressing
7.2 Interrupt
7.3 Quasi-bidirectional I/Os
8 LIMITING VALUES
9 HANDLING
10 DC CHARACTERISTICS
11 I
2
C-BUS TIMING CHARACTERISTICS
12 PACKAGE OUTLINES
13 SOLDERING
13.1 Introduction
13.2 DIP
13.2.1 Soldering by dipping or by wave
13.2.2 Repairing soldered joints
13.3 SO and SSOP
13.3.1 Reflow soldering
13.3.2 Wave soldering
13.3.3 Repairing soldered joints
14 DEFINITIONS
15 LIFE SUPPORT APPLICATIONS
16 PURCHASE OF PHILIPS I
2
C COMPONENTS