Document Number: MC33742
Rev. 11, 6/2008
Freescale Semiconductor
Advance Information
System Basis Chip with
Enhanced High Speed CAN
Transceiver
33742
33742S
The 33742 and the 33742S are SPI-controlled System Basis Chips
(SBCs) combining many frequently used functions along with a CAN 2.0-
compliant transceiver, used in many automotive electronic control units
(ECUs). The 33742 SBC has a fully protected fixed 5.0V low dropout
internal regulator with current limiting, over-temperature pre-warning,
and reset. A second 5.0V regulator can be implemented using external
pass PNP bipolar junction pass transistor driven by the SBC’s external
V2 sense input and V2 output drive pins.
SYSTEM BASIS CHIP
The SBC has four main operating modes: Normal, Standby, Stop, and
Sleep mode. Additionally there is an internally switched high side power
supply output, four wake-up inputs pins, a programmable window
watchdog, interrupt, reset, and a SPI module for communication and
control. The high speed CAN A and B transceiver is available for inter-
module communication.
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42345B
EP SUFFIX
(PB-FREE)
98ASA10825D
48-PIN QFN
28-PIN SOICW
Features
• 1.0Mbps CAN transceiver bus interface with bus diagnostic capability
• SPI control at frequencies up to 4.0Mhz
• 5.0V low dropout voltage regulator with current limiting, over-
temperature prewarning, and output monitoring and reset
• a Second 5.0V regulator capability using an external series pass
transistor
• Normal, Standby, Stop, and Sleep modes of operation with Low sleep
and Stop mode current
• A high side (HS) switch output driver for controlling external circuitry.
• Pb-free packaging designated by suffix code EG and EP
ORDERING INFORMATION
Temperature
Range (TA)
Device
Package
MC33742DW/R2
MCZ33742EG/R2
MC33742SDW/R2
MCZ33742SEG/R2
MC33742EP/R2
28 SOICW
48 QFN
-40°C to 125°C
VPWR
33742
V2
5.0V
VDD VSUP
V2CTRL
RST
V2
MCU
VPWR
CS
CS
L0
L1
L2
L3
SCLK
SCLK
SPI
MOSI
MISO
MOSI
MISO
Safe
WDOG
HS
Circuitry
INT
ECU Local
Circuitry
Twisted
TXD
RXD
CANH
CANL
GND
CAN Bus
Pair
GND
Figure 1. 33742 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007-2008. All rights reserved.