MOTOROLA 33990 User Manual

ANALOG
PRODUCTS

MC33990
FACT SHEET

APPLICATIONS

• Farm Equipment

• Industrial Equipment

• Robotic Systems

• Automotive Systems

• Applications where
Module-to-Module
Communication is
Required

• Marine and Aircraft
Networks

COMMUNICATION

LIN, ISO-9141, J-1850

CUSTOMER BENEFITS

• Lower system cost with reduced part count with
simple external hook up

• Industry standard communication protocol

• Smaller system (reduced component count)

• Faster design cycle time

33990 SERIAL LINK J-1850 BUS TRANSCEIVER

The 33990 provides bi-directional half-duplex communication meeting the automo­tive SAE Standard J-1850 Class B Data Communication Network Interface specifi­cation. It interfaces directly to microcontrollers, serves to transmit and receive sin­gle-wire bus data at 10.4 kB/s using variable pulse width modulation, operates from
vehicle’s 12 V battery or board level DC power source, and shifts microcontroller’s

5.0 V CMOS logic level signals to 0 to 7.0 V reduced radiated EMI waveshaped sig­nals. A tristateable 4X/Loop pin invokes Normal or Disabled Waveshaping, or
Looped-Back Tx output to Rx signal after being waveshaped but not transmitted
over the bus to check bus integrity.

The 33990 is designed to
enhance robustness to a
double fault condition.
(Loss and reconnection of
module battery while
module ground is lost.)

Performance Typical Values

Bus Output J-1850 V

PWM

Data Rate to 20 kB/s
Operating Voltage 9.0 – 16 V
Sleep/Stdby Current 20 µA
ESD ± 2000 V
Operating Temp -40°C ≤ TA≤ 125°C

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Simplified Application Diagram

V

BATT

+V

33990

BAT

BUS

Primary

Node

SLEEP

MCU

Tx
Rx
4X/Loop GND

LOAD

Secondary

Nodes

QUESTIONS

• What type of module communication protocol are you using?

• Do you need a robust half-duplex bi-directional communication between two

modules?

• Do you need a communication bus with signal waveshaping for radiated noise
reduction?

• Do you need a communication device that translates low-level microcontroller
logic signals to and from a high-level communication bus?

• Do you need a communication system that meets the automotive SAE J-1850
Class B V

PWM

Standard?

FEATURES

• Enhanced loss of ground protection

• Interfaces directly to standard 5.0 V CMOS microcon-

troller

• Off-bus loopback diagnostic mode

• Controlled voltage and current waveshaping of bus

drive (for radiated EMI reduction)

• Waveshaping can be disabled

• Additional devices available for comparison in Analog

Selector Guide SG1002/D

Shut Auto

Protection Detect Limiting Down Retry

Over Current/SC ••
Over Temperature •••
Open GND •••

How to reach us:
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;

P.O. Box 5405, Denver, Colorado 80217
1–303–675–2140 or 1–800–441–2447

JAPAN:Motorola Japan Ltd.; SPS, Technical Information Center,
3–20–1, Minami–Azabu. Minato–ku, Tokyo 106–8573 Japan
81–3–3440–3569

ASIA/PACIFIC:Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre,
2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong
852–26668334

Technical Information Center: 1–800–521–6274
HOME PAGE:http://www.motorola.com/semiconductors

Ordering Ship Motorola
Information Package Method Part Number

8 SOICN Rail **33990D

T/R **33990DR2
Data Sheet Order Number MC33990/D
Contact Sales for Evaluation Kit Availability
**Prefix Index:

PC = Eng Samples; XC = In Qual; MC = Production

MC33990FS/D
Rev. 1

MOTOROLA and the Stylized M Logo are registered in the U.S. Patent & Trademark Office.
All other product or service names are the property of their respective owners.
© Motorola, Inc. 2002

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