MC33990EF [NXP]
MC33990EF;
NXP 
Analog Products Fact Sheet
Networking
MC33990
Enhanced Class B Serial Transceiver
LIN, ISO-9141
J-1850 Physical
Interfaces
33990 SIMPLIFIED APPLICATION DIAGRAM
DESCRIPTION
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
33990
VBAT
+VBAT
Primary
Node
BUS
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.
SLEEP
TX
Secondary
Nodes
LOAD
GND
MCU
RX
The 33990 is designed to enhance robustness
to a double fault condition. (Loss and
reconnection of module battery while module
ground is lost.)
4X/LOOP
APPLICATIONS
PERFORMANCE
TYPICAL VALUES
J-1850 V
• Farm Equipment
Bus Output
PWM
• Industrial Equipment
• Robotic Systems
• Automotive Systems
Data Rate
to 20 kB/s
9.0 – 16 V
20 µA
Operating Voltage
Sleep/Stdby Current
ESD
• Applications where Module-to-Module
Communication is Required
± 2000 V
• Marine and Aircraft Networks
Operating Temperature
-40°C ≤ T ≤ 125°C
A
FEATURES
QUESTIONS
• Designed for SAE J-1850 class b data rates
• Full operational bus dynamics over a supply voltage of 9.0 V to 16 V
• Ambient operating temperature of -40°C to 125°C
• Interfaces directly to standard 5.0 V CMOS microcontroller
• BUS pin protected against shorts to battery and ground
• Thermal shutdown with hysteresis
• 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?
• Voltage waveshaping of bus output driver
• Do you need a communication device that
translates low-level microcontroller logic
signals to and from a high-level
communication bus?
• Internally reverse battery protected
• 40 V max V
capability
BAT
• Devices available for comparison are in the Analog Product Selector
Guide - SG1002, and Automotive Product Selector Guide - SG187
• Do you need a communication system that
meets the automotive SAE J-1850 Class B
V
Standard?
PWM
SHUT
AUTO
PROTECTION
Overcurrent/SC
Overtemperature
Open GND
DETECT LIMITING DOWN
RETRY
z
z
z
z
z
z
z
z
CUSTOMER BENEFITS
ORDERING INFORMATION
Temperature
Device
• Lower system cost with reduced part count with simple external
hook up
Package
Range (TA)
MC33990D/DR2
-40°C to 125°C
MCZ33990EF/R2
• Industry standard communication protocol
• Smaller system (reduced component count)
• Faster design cycle time
8 SOICN
MC33990
Data Sheet Order Number
Contact Sales for Evaluation Kit Availability
8 SOICN
1.27 mm Pitch
4.9 mm x 3.9 mm Body
Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc.
All other product or service names are the property of their respective owners.
© Freescale Semiconductor, Inc. 2006. All rights reserved.
MC33990FS
Rev 2.0
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