high performance needs great design. Datasheet: AS8222 Enhanced FlexRay Standard Transceiver Please be patient while we update our brand image as austriamicrosystems and TAOS are now ams. www.ams.com AS8222 Enhanced FlexRay Standard Transceiver Interface with optional bus guardian for bus supervision 1 General Description Automatic thermal shutdown protection The AS8222 is a high-speed fault tolerant device operating as Supports 12, 24V systems with low sleep current consumption interface between a generic FlexRay Communication Controller and the copper wiring. Integrated power management system This device is the first FlexRay certified Transceiver for temperature Two INH pins for the external voltage regulators control ranges up to 150C ambient temperature. For bare-die deliveries Local wake-up input please contact ams for more information. Remote wake-up capability via FlexRay bus in sleep mode The AS8222 is designed to extend the application range for high speed and safety critical time triggered bus systems in an Supports 2.5, 3, 3.3, 5 V microcontrollers and automatically automotive environment. The bus driver is protected against short adapts to interface levels circuits to the supply and GND. The AS8222 operates at baudrates Does not disturb the bus line if not powered up to 10 Mbps and is fully conforming to the FlexRay Electrical Protected against damage due to short circuit conditions on the Physical Layer Specification V2.1 Rev B. bus (positive and negative battery voltage) The AS8222 provides a host controller interface consisting of Enable Small Pb-free package: SSOP-20 (EN) and Standby (STBN) input pins for mode handling by the microcontroller and the Error (ERRN) output pin, signalling failures Automotive qualified to AEC-Q100, grade 0 and status information. For bare-die deliveries please contact us. The device supports the NORMAL mode with activated FlexRay bus transmitter and receiver, the RECEIVE ONLY mode with activated 3 Applications receiver only to avoid unwanted disturbances while listening to the communication and the low-power modes STANDBY and SLEEP The AS8222 FlexRay Standard Transceiver is best fitting for with very low power consumption. automotive FlexRay nodes where bus wake-up and voltage regulator In case of undervoltage at one of the supply voltages (VBAT, VCC, control for voltage supplies is needed. and VIO) the device will change its mode to a low-power mode The device addresses all ECUs connected to the permanent battery (either STANDBY or SLEEP mode) and the device will signal an supply (terminal 30). error accordingly. In case of low voltage is detected on both VBAT and VCC the device will enter the POWER-OFF mode. The device is best suited for high temperature applications with up to 150C. Ensuring application in safety critical environments a two wire bus- guardian interface is implemented where additional redundant circuitries on the electronic-control-unit can monitor the communication on the receive enable output (RxEN) and can activate and deactivate through the bus guardian enable input (BGE) the transmitter. Additionally in low-power modes the wake conditions at the RxEN pin can be monitored. A thermal sensor circuit with an integral shutdown mechanism prevents damage to the device in extreme temperature conditions. 2 Key Features Data transfer up to 10 Mbps Compliant with FlexRay Electrical Physical Layer Specification V2.1 Rev. B Wide operating ambient temperature range -40C to +150C Excellent EMC performance High common mode range insures excellent EMI immunity www.ams.com/eng/FlexRay/AS8222 Revision 1.0 1 - 42