Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33990/D
Rev 1.0, 2/2003
Advance Information
Enhanced Class B Serial
Transceiver
The 33990 is a serial transceiver designed to provide bi-directional half-
duplex communication meeting the automotive SAE Standard J-1850 Class B
Data Communication Network Interface specification. It is designed to
interface directly to on-board vehicle microcontrollers and serves to transmit
and receive data on a single-wire bus at data rates of 10.4 kbps using Variable
Pulse Width Modulation (VPWM). The 33990 operates directly from a vehicle's
12 V battery system and functions in a logic fashion as an I/O interface
between the microcontroller's 5.0 V CMOS logic level swings and the required
0 V to 7.0 V waveshaped signal swings of the bus. The bus output driver is
short circuit current limited.
Features
• 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
• Voltage Waveshaping of Bus Output Driver
• Internally Reverse Battery Protected
• 40 V Max V
BAT
Capability
33990
J-1850 SERIAL TRANSCEIVER
Freescale Semiconductor, Inc...
D SUFFIX
PLASTIC PACKAGE
CASE 751
(8-LEAD SOICN)
ORDERING INFORMATION
Device
MC33990D/DR2
Temperature
Range (T
A
)
-40 to 125°C
Package
8 SOICN
33990 Simplified Application Diagram
V
BAT
V
BAT
BUS
470 pF
10.6 kΩ
33990
47 µH
Primary
Node
SLEEP
Tx
MCU
Rx
LOAD
Secondary
Nodes
GND
4X/LOOP
This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Motorola, Inc. 2003
For More Information On This Product,
Go to: www.freescale.com
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
