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
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2002 Nov 22 10
Philips Semiconductors Product speciļ¬cation
Remote 8-bit I/O expander for I
2
C-bus
PCF8574
a
ndbook, full pagewidth
MBD974
S 0 1 0 0 A2 A1 A0 0 A
start condition
DATA 1
R/W acknowledge
from slave
A DATA 2 ASDA
SCL
WRITE TO
PORT
t
pv
DATA OUT
FROM PORT
slave address (PCF8574) data to port data to port
12345678
acknowledge
from slave
acknowledge
from slave
t
pv
DATA 2 VALIDDATA 1 VALID
Fig.11 WRITE mode (output).