UJA1079ATW/5V0/1J NXP

UJA1079A LIN core system basis chip Rev. 2 31 January 2011 Product data sheet 1. General description The UJA1079A core System Basis Chip (SBC) replaces the basic discrete components commonly found in Electronic Control Units (ECU) with a Local Interconnect Network (LIN) interface. The UJA1079A supports the networking applications used to control power and sensor peripherals by using the LIN interface as a local sub-bus. The core SBC contains the following integrated devices: LIN transceiver compliant with LIN 2.1, LIN 2.0 and SAE J2602, and compatible with LIN 1.3 Advanced independent watchdog (UJA1079A/xx/WD versions) 250 mA voltage regulator for supplying a microcontroller extendable with external PNP transistor for increased current capability and dissipation distribution 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 UJA1079A is designed to be used in combination with a microcontroller. The SBC ensures that the microcontroller always starts up in a controlled manner.UJA1079A NXP Semiconductors LIN core system basis chip 2. Features and benefits 2.1 General Contains LIN ECU functions: LIN transceiver 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 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 LIN bus pin and the wake-up pins 6 kV ElectroStatic Discharge protection IEC 61000-4-2 on the LIN bus pin and the wake-up pins 58 V short-circuit proof LIN bus pin Battery and LIN bus pins are protected against transients in accordance with ISO 7637-3 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 LIN transceiver LIN 2.1 compliant LIN transceiver 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 2.3 Power management Wake-up via LIN or local wake-up pins with wake-up source detection 2 wake-up pins: WAKE1 and WAKE2 inputs can be switched off to reduce current flow Output signal (WBIAS) to bias the wake-up pins, selectable sampling time of 16 ms or 64 ms Standby mode with very low standby current and full wake-up capability V1 active to maintain supply to the microcontroller Sleep mode with very low sleep current and full wake-up capability 2.4 Control and diagnostic features Safe and predictable behavior under all conditions Programmable watchdog with independent clock source UJA1079A All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 31 January 2011 2 of 46