UJA1078ATW/5V0/WD, NXP

UJA1078A High-speed CAN/dual LIN core system basis chip Rev. 2 28 January 2011 Product data sheet 1. General description The UJA1078A core System Basis Chip (SBC) replaces the basic discrete components commonly found in Electronic Control Units (ECU) with a high-speed Controller Area Network (CAN) and two Local Interconnect Network (LIN) interfaces. The UJA1078A supports the networking applications used to control power and sensor peripherals by using a high-speed CAN as the main network interface and the LIN interfaces as local sub-busses. The core SBC contains the following integrated devices: High-speed CAN transceiver, inter-operable and downward compatible with CAN transceiver TJA1042, and compatible with the ISO 11898-2 and ISO 11898-5 standards LIN transceivers compliant with LIN 2.1, LIN 2.0 and SAE J2602, and compatible with LIN 1.3 Advanced independent watchdog (UJA1078A/xx/WD versions) 250 mA voltage regulator for supplying a microcontroller extendable with external PNP transistor for increased current capability and dissipation distribution Separate voltage regulator for supplying the on-board CAN transceiver Serial Peripheral Interface (SPI) (full duplex) 2 local wake-up input ports Limp home output port In addition to the advantages gained from integrating these common ECU functions in a single package, the core SBC offers an intelligent combination of system-specific functions such as: Advanced low-power concept Safe and controlled system start-up behavior Detailed status reporting on system and sub-system levels The UJA1078A is designed to be used in combination with a microcontroller that incorporates a CAN controller. The SBC ensures that the microcontroller always starts up in a controlled manner.UJA1078A NXP Semiconductors High-speed CAN/dual LIN core system basis chip 2. Features and benefits 2.1 General Contains a full set of CAN and LIN ECU functions: CAN transceiver and two LIN transceivers Scalable 3.3 V or 5 V voltage regulator delivering up to 250 mA for a microcontroller and peripheral circuitry an external PNP transistor can be connected for better heat distribution over the PCB Separate voltage regulator for the CAN transceiver (5 V) Watchdog with Window and Timeout modes and on-chip oscillator Serial Peripheral Interface (SPI) for communicating with the microcontroller ECU power management system Designed for automotive applications: Enhanced ElectroMagnetic Compatibility (EMC) performance 8 kV ElectroStatic Discharge (ESD) protection Human Body Model (HBM) on the CAN/LIN bus pins and the wake-up pins 6 kV ElectroStatic Discharge protection IEC 61000-4-2 on the CAN/LIN bus pins and the wake-up pins 58 V short-circuit proof CAN/LIN bus pins Battery and CAN/LIN bus pins are protected against transients in accordance with ISO 7637-3 Supports remote flash programming via the CAN bus Small 6.1 mm 11 mm HTSSOP32 package with low thermal resistance Pb-free Restriction of Hazardous Substances Directive (RoHS) and dark green compliant 2.2 CAN transceiver ISO 11898-2 and ISO 11898-5 compliant high-speed CAN transceiver Dedicated low dropout voltage regulator for the CAN bus: Independent of the microcontroller supply Significantly improves EMC performance Bus connections are truly floating when power is off SPLIT output pin for stabilizing the recessive bus level 2.3 LIN transceivers 2 LIN 2.1 compliant LIN transceivers Compliant with SAE J2602 Downward compatible with LIN 2.0 and LIN 1.3 Low slope mode for optimized EMC performance Integrated LIN termination diode at pin DLIN 2.4 Power management Wake-up via CAN, LIN or local wake-up pins with wake-up source detection 2 wake-up pins: UJA1078A All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 28 January 2011 2 of 54