AS8221
FlexRay™ Standard Transceiver
Description
The AS8221 is a high-speed automotive transceiver for fault tolerant and high speed applications, operating as the bi-directional interface between a generic communication controller and the twisted pair copper wires. The device enables two-way communication with the microcontroller with full mode handling, including the low-power modes.
The transmission rates up to 10Mbps as well as the implemented Bus Guardian interface enables this transceiver the usage in fault tolerant and hard real-time applications in the stringent automotive environment. An extended diagnostic interface, 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 temperature conditions. The symmetrical transient control for the high- and low-side driver for both the bus-minus and bus-plus line allows an ideal balance of communications over different network topologies, with excellent EMC performance.
The product is available in SSOP20 package.
主要特征
- Data transfer up to 10 Mbps
- Compliant with FlexRay Electrical Physical Layer Specification V2.1 Rev. B
- Excellent EMC performances. High common mode range insure excellent EMI
- Interface with optional bus guardian for bus supervision
- Automatic thermal shutdown protection
- Supports 12, 24V systems with low sleep current
- Integrated power management system
- Two INH pins for the external voltage regulators control
- Local wake-up input
- Remote wake-up capability via FlexRay bus in SLEEP mode
- Supports 2.5, 3, 3.3, 5 V micro controllers and automatically adapts to interface levels
- Protection against damage due to short circuit conditions on the bus (positive and negative battery voltage)
- Operating temperature range -40ºC to +125ºC
产品应用
The device is ideal for high speed automotive bus systems, backbone bus and gateways, X-by-wire systems, redundant bus systems, bus topologies with Active Stars, and safety critical applications. Designed for FlexRay.
