1997 Oct 21 3
Philips Semiconductors Product specification
I
2
C-bus controller
PCF8584
1 FEATURES
• Parallel-bus to I
2
C-bus protocol converter and interface
• Compatible with most parallel-bus
microcontrollers/microprocessors including 8049, 8051,
6800, 68000 and Z80
• Both master and slave functions
• Automatic detection and adaption to bus interface type
• Programmable interrupt vector
• Multi-master capability
• I
2
C-bus monitor mode
• Long-distance mode (4-wire)
• Operating supply voltage 4.5 to 5.5 V
• Operating temperature range: −40 to +85 °C.
2 GENERAL DESCRIPTION
The PCF8584 is an integrated circuit designed in CMOS
technology which serves as an interface between most
standard parallel-bus microcontrollers/microprocessors
and the serial I
2
C-bus. The PCF8584 provides both master
and slave functions.
Communication with the I
2
C-bus is carried out on a
byte-wise basis using interrupt or polled handshake.
It controls all the I
2
C-bus specific sequences, protocol,
arbitration and timing. The PCF8584 allows parallel-bus
systems to communicate bidirectionally with the I
2
C-bus.
3 ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
PCF8584P DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
PCF8584T SO20 plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
