AS8220A View Datasheet(PDF) - austriamicrosystems AG

Part Name

Description

Manufacturer

AS8220A

FlexRay Basis Transceiver

austriamicrosystems AG 

AS8220A

F l e x R a y TM B a s i s Tr a n s c e i v e r

Objective

Data Sheet

1 General Description

2 Key Features

This objective data sheet describes the intended

functionality of the AS8220A bus transceiver. As long

the device is not fully qualified, the parameters are not

characterized in the means that parameters may change

lid or can be updated during final product qualification and

characterization. This document shows the objective of

the AS8220A and this document is subjected to change

a without notice.

The AS8220A is a high-speed automotive transceiver

v for fault tolerant and high speed applications, operating

as the bi-directional interface between a generic

ill communication controller and the twisted pair copper

wires. The device enables two-way communication with

the microcontroller with full mode handling, including the

t low-power modes.

The transmission rates up to 10Mbps as well as the

G s implemented Bus Guardian interface enables this

transceiver the usage in fault tolerant and hard real-time

A3 Applicatiotns applications in the stringent automotive environment. An

extended diagnostic interface, offers advanced bus-

s n failure detection capabilities with the intelligent

combination of bus-current measurement and logical

e comparators.

m t A thermal sensor circuit with an integral shutdown

mechanism prevents damage to the device in extreme

a n temperature conditions. The symmetrical transient

control for the high- and low-side driver for both the bus-

o minus and bus-plus line allows an ideal balance of

communications over different network topologies, with

c excellent EMC performance. The product is available in

SSOP14 package.

l Figure 1. Block Diagram

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

Enable pin for an optional bus guardian

Automatic thermal shutdown protection

Low standby current

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

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, where the basic features are demanded.

icaVIO

AS8220A

STBN

n ERRN

VIO

Host

Controller

Interface

Bus

Failure

Detector

hRxD

TxD

TxEN

Communi-

cation

Controller

Interface

Digital Logic

Transmitter

BP

BM

TecBGE

Bus

Guardian

Interface

Receiver

Power Supply

Interface

www.austriamicrosystems.com

Revision 17920-001-10a

1 - 33

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