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 4
Philips Semiconductors Product speciļ¬cation
Remote 8-bit I/O expander for I
2
C-bus
PCF8574
4 BLOCK DIAGRAM
Fig.1 Block diagram (pin numbers apply to DIP16 and SO16 packages).
handbook, full pagewidth
MBD980
I C BUS
CONTROL
2
INPUT
FILTER
1
2
3
14
15
13
INTERRUPT
LOGIC
12
P7
11
P6
10
P5
9
P4
7
P3
6
P2
5
P1
4
P0
8 BIT
I/O
PORT
SHIFT
REGISTER
LP FILTER
WRITE pulse
READ pulse
POWER-ON
RESET
16
8
V
DD
V
SS
SDA
SCL
A2
A1
A0
INT
PCF8574