Unterpremstaetten, Austria austriamicrosystems has developed the AS8221 high-speed automotive bus transceiver that supports baud rates of up to 10 Mbits/s, which the company claims is ten times the bandwidth available on a CAN-based network. It also supports the bus guardian interface, enabling fault tolerant and hard real-time applications.
With a differential bus voltage level of 1.3V and a time skew below one nanosecond, the AS8221 fully conforms to the FlexRay Physical Layer specification. For more on the specification, click here: www.flexray.com.
Serving as the bi-directional interface between the FlexRay communication controller and the twisted pair copper wires, the AS8221 enables two-way communications with the microcontroller (FlexRay Host Controller) with full mode handling, including the low-power modes. The device also provides an extended diagnostic interface.
The AS8221 offers advanced bus-failure detection capabilities with the intelligent combination of bus-current measurement and logical comparators. A thermal sensor circuit with an integral shutdown mechanism prevents damage to the device in extreme temperatures. The symmetrical transient control for the high- and low-side driver for both the bus-minus and bus-plus line to balance communications over different network topologies.
For a technical paper on automotive CAN bus signal integrity design, click here: www.techonline.com/learning/techpaper/193103352.
The first generation of automotive-qualified AS8221 is available in a lead-free SSOP20 package. Qualified samples of the next generation FlexRay Electrical Physical Layer specification V2.1 Rev A will be available in December. More product specific information can be found on the austriamicrosystems website at: www.austriamicrosystems.com/03products/21_bus_systems.htm.
Pricing for the transceiver is $6.50 per unit in quantities of 1,000.
austriamicrosystems AG,+43 (0) 3136 500 5968