AS8221 Datasheet, PDF (1/2 Pages) ams AG – High Performance Bus Transceiver

AS8221
High Performance Bus Transceiver
PRODUCT BRIEF
General 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 communications
with the microcontroller with full mode handling,
including the low-power modes.
Applications
- FlexRay™ networks
- High speed automotive bus systems
- Backbone bus and gateways
- Safety critical applications
- X-by-wire systems
- Redundant bus systems
- Bus topologies with active stars
Package: lead-free SSOP20
Functional Description
Transmission rates up to 10 Mbps 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.
Key Features
- Data transfer up to 10 Mbps
- Supports 2.5, 3, 3.3, 5 V microcontrollers and
automatically adapts to interface levels
- Does not disturb the bus line when un-powered
- Fail silent behaviour
- Protection against damage due to short circuit
conditions on the bus (positive and negative
battery voltage)
- Supports 12, 24, 42 V systems with low sleep
current (30 µA)
- Integrated power management system
o Two INH pins for the external voltage
o Local wake-up input via STBN-, WAKE- and
TxD-Pins
o Remote wake-up capability via FlexRay™ bus
in sleep mode
- Operating temperature range -40°C to +125°C
- Compliant with FlexRay™ Electrical Physical Layer
specification
- Excellent EMC performance
- High common mode range insure
excellent signal integrity on
diverse bus topologies
- Bus guardian Interface for optional
bus supervision
- Automatic thermal shutdown
protection
Code: 12643-103-00a
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