MC33742FS, System Basis Chip (SBC) with Enhanced High-Speed CAN Transceiver

Analog, Mixed Signal and Power Management
MC33742
System Basis Chip (SBC) with Enhanced High Speed CAN Transceiver
Applications
MC33742 Simplified Application Drawing
• Aircraft Systems
• Automotive Systems
• Robotic Systems
• Industrial Actuator Control
VPWR
• Marine Applications
33742
• Automotive Electronic Control Units
including a High Speed CAN
5.0 V
Overview
VSUP
RST
V2CTRL
V2
MCU
The MC33742 and the 33742S are
SPI-controlled System Basis Chips
(SBCs) combining many frequently
used functions along with a CAN 2.0compliant transceiver, used in many
automotive electronic control units
(ECUs). The MC33742 SBC has a
fully protected fixed 5.0 V low dropout
internal regulator with current limiting,
over-temperature pre-warning, and
reset. A second 5.0 V 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
terminals.
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 input
terminals, a programmable window
watchdog, interrupt, reset, and a SPI
module for communication and
control. The High Speed CAN 2.0 A /B
transceiver is available for intermodule communication.
VDD
CS
SCLK
MOSI
MISO
SPI
CS
SCLK
MOSI
MISO
TXD
GND
RXD
VPWR
L0
L1
L2
L3
WDOG
INT
V2
HS
CANH
CANL
Safe Circuitry
ECU Local Supply
Twisted
CAN Bus
Pair
Performance
Typical Values
Operating Voltage
5.5 V to 18 V
Data Rate
1.0 Mbps
Internal 5.0 V Regulator
200 mA
External 5.0 V Series Regulator
200 mA
Supply Current with CAN Wake-up Enabled
Supply Current in Sleep Mode, CAN in Sleep State with CAN
Wake-up Enabled
Supply Current in Stop Mode, CAN in Sleep State with CAN
Wake-up Enabled
Ambient Operating Temperature
53 + 12 = 65 µA
80 + 12 = 92 µA
-40°C ≤ TA ≤ 125°C
Features
• High Speed 1.0 Mbps CAN interface
with bus diagnostic capability
(detection of CANH and CANL short to
ground, to VDD, and to VSUP)
• Low-drop voltage 5.0 V, 200 mA VDD
Regulator with current-limiting, overtemperature pre-warning, and output
monitoring with reset
Protection
•
Over-temperature
•
Over-current
•
•
Short-circuit
•
•
• Normal, standby, stop, and sleep
modes with low sleep and stop mode
current
HS
• Software programmable watchdog
window, interrupt, and reset
Benefits
• Standby current consumption reduced
• Flexible wake-up conditions and
watchdog function
• Innovative CAN high speed diagnostic
with failure mode sent to the MCU
through SPI interface
• Simple system design with direct
interfacing to a microprocessor
• Reduced PC board space resulting in
enhanced application reliability
• Economical solution with an optimized
performance/cost ratio
• Simplified MCU power supply design
with internal safety features and output
voltage supervisory circuits
Freescale offers a complete line of compatible system basis chips with transceivers
Shut
Down
Under-voltage
V2
• Four external wake-up inputs
Limiting
Auto
Retry
Status
Reporting
VDD
• Additional 5.0 V regulator with external
series pass transistor
• 150 mA high side switch output for
control of external circuitry
Detect
Under-voltage
Over-temperature
•
•
•
•
•
•
•
•
•
•
Over-current
CAN Bus Fail Detection
CANH/L Short-to-Battery
•
•
•
•
CANH/L Short-toGround
•
•
•
•
CANH/L Short-to-VDD
•
•
•
•
Battery Line
Under-voltage
•
•
Battery Disconnect
•
•
Simplified Internal Block Diagram
V2CTRL
VSUP
V2
VSUP Monitor
Dual Voltage Regulator
V1 Monitor
HS Control
5.0 V/200 mA
V1
Mode Control
Oscillator
HS
Interrupt
Watchdog
Reset
L1
L2
L3
Programmable
Wake-up Input
SPI
L4
CANH
CANL
High Speed
1.0 Mbps
CAN Physical Layer
INT
WDOG
RST
MOSI
SCLK
MISO
CS
TXD
RXD
GND
• Questions
• Q: Are you looking for a complete,
easy-to-design power supply solution
for your embedded system?
• Q: Do you need an advanced
microcontroller power supply with
power sequencing and supervisory
functions?
• Q: What voltage (5.0 V or 3.3 V) does
your microcontroller need?
Ordering Information
Part Number
Temperature Range
Package
MC33742PEG/R2
-40°C to 125°C
28 SOICW (Pb-Free)
MC33742SPEG/R2
-40°C to 125°C
28 SOICW (Pb-Free)
MC33742PEP/R2
-40°C to 125°C
48 QFN (Pb-Free)
Development Tools
Part Number
Description
• Q: What type of CAN (high/low
speed) do you need?
KIT33742DWEVB
Evaluation Kit
• Q: Do you need several power
supplies?
Document Number
Title
Description
• Q: Do you need a fully protected low
drop series pass regulator?
MC33742
Data Sheet
Presents the specifications for the product
• Q: Would you like to monitor BUS
failure during a high speed CAN
communication?
SG1002
Selector
Guide
Analog and power management device
comparison
SG187
Selector
Guide
Automotive device comparison
• Q: Do you want to reduce your
application current consumption in
standby mode?
Documentation
• Q: How many wake-up inputs do you
need?
• Q: Do you need a watchdog with
independent reset/interrupt
capability?
28 SOICW
1.27 mm Pitch
18.0 mm x 7.5 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., 2009. All rights reserved.
Document Number: MC33742FS, Rev 6.0, 7/2011
(Bottom View)
48 QFN
0.5 mm Pitch
7.0 mm x 7.0 mm Body