MC33903D Simplified Application Drawing
Features
• LDO Linear Power Supply 5.0 or 3.3 V, up to 300 mA with an optional
external ballast transistor
• Under-voltage management for cranking
• Internal 5.0 V regulator for CAN driver supply
• Low current consumption in sleep mode
• Fail safe state machine linked with SAFE pin
• Secured SPI with Watchdog capability
• High precision V
SUP
sense monitoring
• Multiple Analog sensing to 1 MUX output
• Configurable I/O with W/U feature
• “B” versions are recommended for new designs. Changes implemented on
“B” versions: resolved V
SUP
slow ramp up behavior, enhanced device
current consumption, and improved oscillator
• CAN, ISO11898-2 and 11898-5 compliant
• 2 LIN transceivers - 2.0, 2.1, and SAE J2602-2 compliant
LIN-T2
LIN-2
RXD-L2
TXD-L2
LIN 2.1 Interface - #2
CS
SCLK
MOSI
INT
5V-CAN
VSUP
MISO
GND
SPI
RST
V
DD
Regulator
DBG
5V-CAN
Configurable
VDD
VB
Analog Monitoring
SAFE
Signals Condition & Analog MUX
Input-Output
V
SENSE
VE
Regulator
V
S2-INT
Oscillator
State Machine
Fail-safe
Power Management
V
S2-INT
MUX-OUT
IO-0
LIN-T1
LIN-1
RXD-L1
TXD-L1
LIN 2.1 Interface - #1
RXD
TXD
Enhanced High-speed CAN
Physical Interface
CANL
CANH
SPLIT
V
S2-INT
V
S2-INT
MC33903S Simplified Application Drawing
Features
• LDO Linear Power Supply 5.0 or 3.3 V, up to 300 mA with an optional
external ballast transistor
• Under-voltage management for cranking
• Internal 5.0 V regulator for CAN driver supply
• Low current consumption in sleep mode
• Fail safe state machine linked with SAFE pin
• Secured SPI with Watchdog capability
• High precision V
SUP
sense monitoring
• Multiple Analog sensing to 1 MUX output
• Configurable I/O with W/U feature
• “B” versions are recommended for new designs. Changes implemented on
“B” versions: resolved V
SUP
slow ramp up behavior, enhanced device
current consumption, and improved oscillator
• CAN, ISO11898-2 and 11898-5 compliant
• 1 LIN transceiver - 2.0, 2.1, and SAE J2602-2 compliant
I/O-3
LIN Term #1
CS
SCLK
MOSI
INT
5V-CAN
VSUP
MISO
GND
SPI
RST
V
DD
Regulator
DBG
5V-CAN
Configurable
VDD
VB
Analog Monitoring
SAFE
Signals Condition & Analog MUX
Input-Output
VSENSE
VE
Regulator
V
S-INT
Oscillator
State Machine
Fail Safe
Power Management
MUX-OUT
I/O-0
LIN-T
LIN
RXD-L
TXD-L
LIN 2.1 Interface - #1
RXD
TXD
Enhanced High Speed CAN
Physical Interface
CANL
CANH
SPLIT
V
S-INT
V
S-INT