Document Number: MC33790
Rev 13.0, 2/2014
Freescale Semiconductor
Technical Data
© Freescale Semiconductor, Inc., 2010 - 2014. All rights reserved.
Two Channel Distributed
System Interface (DSI) Physical
Interface Device
The 33790 is a dual channel physical layer interface IC for the
Distributed System Interface (DSI) bus. It is designed to meet
automotive requirements. It
can also be used in non automotive
applications. It supports bidirectional communication between slave
and master ICs. Some slave devices derive a regulated 5.0
V from
the bus, which can be used to power sensors, thereby eliminating the
need for additional circuitry and wiring. This device is powered by
SMARTMOS technology.
Features
• Two independent DSI compatible buses
• Wave-shaped bus output voltage
• Independent thermal shutdown and current limit
• Return signalling current detection
• Internal logic input pull-ups and pull-downs
• On-board charge pump
•2.0 kV ESD capability
• Communications rate up to 150 kbps
Figure 1. 33790 Simplified Application Diagram
DISTRIBUTED SYSTEM INTERFACE (DSI)
EG SUFFIX (PB-FREE)
98ASB42567B
16-PIN SOICW
33790
Applications
• Simple bus for remote control and sensing
• Automotive, aircraft, marine, industrial controls,
and safety systems
• Heating and air-conditioning
DSI0F
DSI0S
DSI0R
DSI1F
DSI1S
DSI1R
CPCAP
VDD
GND
DSI0O
VSUP
DSI1O
GND
33790
+5.0 V
+25 V
BUS_IN BUS_OUT
BUS_IN BUS_OUT
33793
33793
33793
DSI
SLAVE
DEVICE
MCU
