MC33990_08 Datasheet, PDF (1/16 Pages) Freescale Semiconductor, Inc – Enhanced Class B Serial Transceiver

Freescale Semiconductor
Technical Data
Enhanced Class B Serial
Transceiver
Document Number: MC33990
Rev 4.0, 10/2008
33990
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 true 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
• Pb-Free Packaging Designated by Suffix Code EF
J-1850 SERIAL TRANSCEIVER
D SUFFIX
EF SUFFIX (PB-FREE)
98ASB42564B
8-PIN SOICN
ORDERING INFORMATION
Device
Temperature
Range (T_A)
Package
MC33990D/DR2
MCZ33990EF/R2
-40°C to 125°C
8 SOICNN
V_BAT
33990
+VBAT
BUS
Primary
Node
SLEEP
MCU
TX
LOAD
RX
4X/LOOP
GND
Secondary
Nodes
Figure 1. 33990 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2006-2008. All rights reserved.