austriamicrosystems presents its FlexRay Transceiver product family at the FlexRay Product Day on November 26/27, 2008
FlexRay Transceiver family including the new AS8224 Active Star Device is designed according to the newest FlexRay standard release
austriamicrosystems' FlexRay transceiver products are designed according to the FlexRay Electrical Physical Layer Specification V2.1 Rev B with enhanced performance. They help to optimize the most limiting FlexRay system parameters in order to provide the highest reliability for the next generation in-vehicle networks.
The AS8221 is already well-known in the FlexRay user community with its unmatched immunity behaviour and its contribution to increase FlexRay network stability. Asymmetric delays turned out to be one of the most limiting parameters for the network layout - this is why austriamicrosystems focused on minimizing the asymmetric delay contribution of its FlexRay Transceivers to solve car makers' key challenges when designing and implementing a FlexRay network topology. The AS8221 is designed for ECUs connected to permanent battery supply (clamp 30) where the transceiver manages the ECU power-up via its inhibit output pins.
The AS8220 is a sister device addressing ECUs supplied with switched battery voltage (clamp 15 and switched clamp 30) where no FlexRay bus wake-up functionality is needed. For this application, the AS8220 is optimized through omission of the VBAT supply pin, the local wake pin and the inhibit pins as well as the removal of the lowpower receiver for detecting FlexRay bus wake-up patterns.
The AS8224 is austriamicrosystems' brand new FlexRay Active Star Device offering 4 FlexRay branches where each branch can be individually controlled and performs a failure detection procedure. The newly introduced device manages message forwarding on 6 communication paths, the communication controller interface, the 4 FlexRay branches and the Interstar interface to enhance FlexRay Active Stars for higher branch count. The AS8224 supports host controlled as well autonomous mode handling allowing the FlexRay Active Star to fully act as a FlexRay gateway when no microcontroller is connected, without interaction from external logic devices.
"Our FlexRay Transceiver family which is available now will create new momentum in the FlexRay product world", comments Harald Gall, Product Manager In-vehicle Networks at austriamicrosystems. "We want to facilitate a better penetration of FlexRay systems given that the product landscape for FlexRay transceivers still seems to be underdeveloped. With our transceiver product family, austriamicrosystems addresses car-makers' demand for product and supplier diversity while common device characteristics like package type and pin assignments support standardisation beyond the FlexRay specification."
All austriamicrosystems FlexRay transceiver products are engineered to the latest FlexRay standard and offer benefits for the FlexRay system while providing higher margins for network reliability. Higher differential output voltage level, best-in-class minimum bittime acceptability and low transmitting and receiving asymmetric delays help to optimize the unavoidable limiting system parameters. Bus failures are detected by a fast digital/analog comparison mechanism while in transmission mode and a highly accurate current sensing mechanism on the bus pins. Status and error flags can be read-out via the host interface. The available bus guardian interface enables device supervision while in case of failure the bus transmitters can be switched off from communication altogether.
FlexRay and the FlexRay logo are registered trademarks. For product specific information or to download data sheets, please visit http://www.austriamicrosystems.com/FlexRay-Transceivers
About ams AG
austriamicrosystems is a leading designer and manufacturer of high performance analog ICs, combining more than 25 years of analog design capabilities and system know-how with its own state-of-the-art manufacturing and test facilities. austriamicrosystems leverages its expertise in low power and high accuracy to provide industry-leading customized and standard analog products. Operating worldwide with more than 1,000 employees, austriamicrosystems focuses on the areas of power management, sensors & sensor interfaces, portable audio and car access in its markets; Communications, Industry & Medical and Automotive, complemented by its Full Service Foundry activities. austriamicrosystems is listed on the SWX Swiss Exchange in Zurich (ticker symbol: AMS).