Freescale's MC33903/4/5 is the second generation System Base Chip (SBC) that can be used as an MCU's advanced power management and incorporates several advanced integrated circuits such as sensors and CAN transceivers, with built-in enhanced high-speed CAN interface (ISO11898-2 and -5), as well as local and bus fault diagnosis, protection and fail-safe operating modes. Mainly used in aerospace and underwater systems, automotive and robot systems, farm equipment, lamp and inductive load control, DC motor control, Industrial Incentive Control etc. This article describes the MC33903/4/5 series of products main features, block diagrams and simplified application block diagram, the main features of the evaluation board KIT33905D5EKEVBE, the establishment of block diagrams, circuit diagrams, bill of materials and PCB layout components and traces. •Aircraft and marine systems
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The 33903/4/5 is the second generaTIon family of the System Basis Chip (SBC). It holds several features and enhances present module designs. The device works as an advanced power management unit for the MCU with addiTonal integrated circuits such as sensors and CAN transceivers. It has a built-in enhanced high-speed CAN interface (ISO11898-2 and -5) with local and bus failure diagnosTIcs, protecTIon, and fail-safe operating modes. The SBC may include zero, one or two LIN 2.1 Interfaces with LIN output pin switches. It includes up to four wake-up input pins that can also be configured as output drivers for flexibility. This device is powered by SMARTMOS technology.
This device implements Multiple Low-power (LP) modes, with very low-current consumption. In addition, the device is part of a family concept where pin compatibility adds versatility to module design.
The 33903/4/5 also implements an innovative and advanced fail-safe state machine and concept solution.
• Voltage regulator for MCU, 5.0 or 3.3 V, part number selectable, with possibility of usage external PNP to extend current capability and share power dissipation
• Voltage, current, and temperature protection
•Extremely low quiescent current in LP modes
•Fully-protected embedded 5.0 V regulator for the CAN driver
•Multiple undervoltage detections to address various MCU specifications and system operation modes (ie cranking)
• Auxiliary 5.0 or 3.3 V SPI configurable regulator, for additional ICs, with overcurrent detection and undervoltage protection
•MUX output pin for device internal analog signal monitoring and power supply monitoring
• Advanced SPI, MCU, ECU power supply, and critical pins diagnostics and monitoring.
• Multiple wake-up sources in LP modes: CAN or LIN bus, I/O transition, automatic timer, SPI message, and VDD overcurrent detection.
• ISO11898-5 high-speed CAN interface compatibility for baud rates of 40 kb/s to 1.0 Mb/s
•Scalable product family of devices ranging from 0 to 2 LINs which are compatible to J2602-2 and LIN 2.1
MC33903
•Automotive and robotic systems
•Farm equipment
•Industrial actuator controls
•Lamp and inductive load controls
•DC motor control applications requiring diagnostics
•Applications where high-side switch control is required 
Figure 1. Internal block diagram of the MC33905 
Figure 2. Internal block diagram of the MC33904 
Figure 3. Internal block diagram of the MC33903 
Figure 4. Simplified application block diagram of the MC33905D 
Figure 5. Simplified application block diagram for the MC33905S 
Figure 6. MC33904 Simplified Application Block Diagram 
Figure 7. Simplified application block diagram of the MC33903
The KIT33905D5EKEVBE supports the 33905D5 and 33904 devices, which are the second generation family of System Basis Chips, which combine several features and enhance present module designs. The devices work as an advanced power management unit for the MCU and additional integrated circuits such as sensors, CAN transceivers. They have a built-in enhanced high speed CAN interface (ISO11898-2 and -5), with local and bus failure diagnostics, protection, and fail safe operation mode. The SBCs may include one or two LIN 2.0 interfaces with LIN. Output pin switches. The 33904/5 include 2 or 3 wake-up input pins than can also be configured as output drivers for flexibility.
Nominal operating supply voltage range of 5.5 V to 27 V
Individually routed power supply inputs for VSUP1 and VSUP2
5.0/3.3 V regulator for MCU with an external PNP ballast transistor to increase current capability
Multiple CAN Bus termination options supported via socket
Two high/low side I/Os (SPI configurable) accessible through test points
Status of I/O-0 and I/O-1 indicated by an LED (dependent on jumper configuration)
Debug mode/watchdog configuration via jumper settings
MUX output voltage accessible through a test point and external resistor selectable through jumper
3.3 V or 5.0 V output voltage test point VAUX (SPI configurable)
I_WAKE_I test point to enable a FET and load VDD with current to wake-up the SBC
LIN1_T and LIN2_T test points to monitor I/O voltages (SPI configurable)
I/O-0, I/O-1, VAUX, 5V_CAN, SAFE, and VDD status indicated by LED
100 mil 2x8 pin standard header connector for SPI communication
100 mil 16 pin standard header connector for custom MCU board connections 
Figure 8. Evaluation board KIT33905D5EKEVBE/KIT33905BD3EVBE outline drawing
•KIT33905D5EKEVBE or KIT33905BD3EVBE Hardware
•CD33905 (includes SPIGen Software)
•CABLE, RIBBON FLAT 16 PIN ASSY, 0.100" PITCH, 6" LENGTH 
Figure 9. Evaluation board KIT33905D5EKEVBE/KIT33905BD3EVBE setup configuration diagram 
Figure 10. Evaluation board KIT33905D5EKEVBE circuit diagram 
Figure 11. Top Panel PCB Component Layout for Evaluation Board KIT33905D5EKEVBE 
Figure 12. Evaluation board KIT33905D5EKEVBE top PCB trace 
Figure 13. Evaluation board KIT33905D5EKEVBE bottom PCB trace
