Maker : austriamicrosystems AG
Part No. : AS8520

Datasheet PDF : AS8520.pdf
Cross Reference : AS8520 Cross Reference
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Product Information

Preliminary Data Sheet AS8520 LIN Tr a ns ce i ve r w it h Vol t ag e Re gu la t or, A t t e nua t or, Relay Drivers, MCU Interface for Automotive Applications www.DataSheet4U.com 1 General Description The AS8520 is a companion IC for sensor and actuator LIN slaves. The device provides application specific add-ons, such as the resistive attenuator for battery voltage sensing, a micro controller interface to control 2 relay drivers, to access control register, and diagnosis options. The AS8520 has a window watchdog which can be enabled as a factory option. Micro controller 4-wire interface for relay driver control, device configuration, status and diagnosis read out, register read / write Operating modes: Normal and Standby or Normal and Sleep as a factory option Window Watchdog with timing options if factory enabled Backup registers to store MCU data during VCC shut down Voltage attenuator with disable. Factory selectable ratio options of 21 and 481 Two low side relay drivers RON < 5Ω -40ºC to +125ºC ambient operating temperature AEC Q 100 automotive qualified 6kV ESD on LIN pin according to IEC 61000-4-2 24bit chip ID for traceability and module ID 24-pin QFN (6x6) package 2 Key Features Operating voltage 6 to 18V, max. 42V for 500 ms Linear, low-drop voltage regulator: VCC = 5V ± 3% or VCC = 3.3V as a factory option 50mA load current Typical 35 µA quiescent current in standby mode Undervoltage detection with reset output, factory adjustable undervoltage threshold and reset time LIN bus transceiver with load independent slew control conforming to LIN 2.0 and SAE J2602, short circuit protection, TX time out fail safe feature, over temperature warning and shut down Figure 1. AS8520 Lin Transceiver Block Diagram 3 Applications The AS8520 is suitable for small actuator or sensor LIN slaves. The device is ideal for LIN 2.0/2.1 network applications like Window lift actuators, Sunroof actuators, Seat actuators and battery sensors. VSUP PORVSUP LDO PORVCC RESET_VCC_N Control Signals LIN Wakeup Receiver WWD Output VCC Temperature Limiter TSHD RESET_VSUP_N EN Mode Control RESET_VSUP_N VBAT_DIV VBAT Resistive divider Reset Block VCC RESET VSUP RX VSS BUS Slew Control LIN Transceiver LDRIVE1 SPI Interface, Diagnostic, Window Watchdog (WWD) GND CS SCLK SDO SDI GND VCC TX 30k Transmitter VCC LDRIVE2 VSS Relay driver AS8520 www.austriamicrosystems.com/Lin_CompanionIC/AS8520 Revision 0.01 1 - 34 AS8520 Preliminary Data Sheet - C o n t e n t s www.DataSheet4U.com 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....................................................................................................................................................... 6 6 Electrical Characteristics........................................................................................................................................................... 7 6.1 Detailed System and Block Specifications ..........................................................................................

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