MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

© Motorola, Inc. 2003

33790 Simplified Application Diagram

Document order number: MC33790/D

Rev 6.0, 02/2004

33790

Advance Information

TWO-CHANNEL DISTRIBUTED

SYSTEM INTERFACE (DSI)

PHYSICAL INTERFACE DEVICE

Two-Channel Distributed System

Interface (DSI) Physical Interface

Device

The 33790 is a two-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 nonautomotive 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.

Features

• Two Independent DSI Compatible Busses

• Pinout Matched to MC68HC55 (SPI to DSI Logic)

• 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

• Motorola now offers Pb-free packages with sufix code EG

EG (Pb free) SUFFIX

DW SUFFIX

CASE 751G

BUS_IN

BUS_OUT

CPCAP

MC68HC55

33790

DSI1R

DSI1S

DSI1F

DSI0R

DSI0S

DSI0F

DSI1O

DSI0O

GND

GND

+5.0 V

DSIBUS1

0.1

µF

BUS_IN

BUS_IN

BUS_OUT

BUS_IN

33791

33793

DSI Slave Device

33927

+25 V

DSIBUS0

ORDERING INFORMATION

Device

Temperature

Package

MC33790DW/R2

-40°C to 150°C

16 SOICW

MC33790EG/R2

-40°C to 150°C

16 SOICW

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com