Preliminary Data Sheet AS8530 LIN Transceiver with Integrated Voltage Regulator and MCU Interface for Automotive Applications Under voltage reset with factory options 1 General Description LIN bus transceiver with load independent slew control The AS8530 is a general purpose companion IC for sensor and conforming to LIN 2.1 and SAE J2602, short circuit protection, actuator LIN slaves offering LIN transceiver and low drop voltage TX time out fail safe feature, over temperature warning and shut regulator. down As well it provides a 2-wire microcontroller interface through shared 6kV ESD on LIN pin according to IEC 61000-4-2 EN and TX pins to access a window watchdog with RC oscillator, Window watchdog if factory enabled. control registers, backup registers and monitoring information. Micro controller 2-wire interface through shared pins for watch- The IC is fabricated in a high voltage CMOS technology which is dog trigger, monitoring, register read /write able to withstand voltages up to 50V. Chip ID for traceability and module ID The product is available in SOIC package with exposed pad. 8 Backup registers to store data during VCC shut down 8 pin epSOIC package 2 Key Features -40C to +125C ambient operating temperature Operating voltage 6 to 18V, max 42V for 500ms Linear, low-drop voltage regulator: VCC = 5V3% or 3.3V as a 3 Applications factory programming option 50mA load current The AS8530 is a System Basis Chip for automotive LIN networked sensor or actuator slaves. Operating modes: Normal and Standby or Normal and Sleep as a factory option Typically 40A quiescent current in standby mode, Typically 30A quiescent current in sleep mode Figure 1. AS8530 LIN Transceiver Block Diagram LDO VSUP VCC POR-VCC POR-VSUP Temperature AS8530 Limiter TSHD RESET VCC N RESET VSUP N Control Mode EN Signals Control Reset Block WWD Output RESET RESET VSUP N LIN Wakeup VCC 2 wire inter- Receiver VSUP face Window RX Watchdog (WWD) VCC 30k Transmitter BUS 15k Slew TX Control GND LIN Transceiver www.austriamicrosystems.com/Lin CompanionIC/AS8530 Revision 0.01 1 - 29AS8530 Preliminary Data Sheet - Contents Contents 1 General Description.................................................................................................................................................................... 1 2 Key Features ............................................................................................................................................................................... 1 3 Applications ................................................................................................................................................................................ 1 4 Pin Assignments......................................................................................................................................................................... 4 4.1 Pin Descriptions........................................................................................................................................................................................ 4 5 Absolute Maximum Ratings....................................................................................................................................................... 5 6 Electrical Characteristics........................................................................................................................................................... 6 6.1 Detailed System and Block Specifications ............................................................................................................................................... 6 6.1.1 Low Dropout Regulator................................................................................................................................................................. 7 6.1.2 LIN Transceiver ............................................................................................................................................................................ 7 CC Undervoltage Reset and Window Watchdog........................................................................................................................ 9 6.1.3 V 7 Detailed Description ................................................................................................................................................................. 12 7.1 Block Description.................................................................................................................................................................................... 12 7.1.1 Voltage Regulator (LDO) ............................................................................................................................................................ 12 7.1.2 Temperature Limiter ................................................................................................................................................................... 12 7.1.3 VSUP Undervoltage Reset ......................................................................................................................................................... 12 7.1.4 RESET........................................................................................................................................................................................ 12 7.1.5 VCC Undervoltage Reset............................................................................................................................................................ 13 7.1.6 Window Watchdog (WWD) ......................................................................................................................................................... 13 7.1.7 LIN Transceiver .......................................................................................................................................................................... 14 7.2 Operating Modes and States.................................................................................................................................................................. 14 7.2.1 Normal Mode .............................................................................................................................................................................. 14 7.2.2 Standby Mode............................................................................................................................................................................. 14 7.2.3 Sleep Mode................................................................................................................................................................................. 14 7.2.4 Temporary Shutdown Mode ....................................................................................................................................................... 14 7.2.5 Thermal Shutdown State ............................................................................................................................................................ 15 7.3 State Diagram......................................................................................................................................................................................... 16 8 Application Information............................................................................................................................................................ 17 8.1 Initialization............................................................................................................................................................................................. 17 8.2 Wake-Up................................................................................................................................................................................................. 18 8.3 Over-Temperature Shutdown ................................................................................................................................................................. 18 8.4 LIN BUS Transceiver.............................................................................................................................................................................. 18 8.4.1 Transmit Mode............................................................................................................................................................................ 18 8.4.2 Receive Mode............................................................................................................................................................................. 18 8.5 RX and TX Interface............................................................................................................................................................................... 19 8.5.1 Input TX ...................................................................................................................................................................................... 19 8.5.2 Output RX................................................................................................................................................................................... 19 8.6 MODE Input EN...................................................................................................................................................................................... 20 8.7 Serial Port Interface................................................................................................................................................................................ 21 8.7.1 Device Configuration using 2-Wire Serial Port ........................................................................................................................... 21 8.8 Control and Diagnosis Registers ............................................................................................................................................................ 24 8.8.1 Definition of Control and Status Registers.................................................................................................................................. 24 8.9 ESD/EMC REMARKS ............................................................................................................................................................................ 26 8.9.1 General Remarks........................................................................................................................................................................ 26 8.9.2 ESD-Test .................................................................................................................................................................................... 26 www.austriamicrosystems.com/Lin CompanionIC/AS8530 Revision 0.01 2 - 29