Datasheet > AS8221-ASST

AS8221-ASST

更新时间： 2024-01-01 00:38:59

品牌	Logo	应用领域
艾迈斯 - AMSCO		/
页数	文件大小	规格书
43页	1002K
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FlexRay Standard Transceiver

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AS8221-ASST 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.69
Base Number Matches：	1

AS8221-ASST 数据手册

Data Sheet

AS8221

FlexRay Standard Transceiver

1 General Description

This document is subjected to change without notice.

2 Key Features

ꢀ

Compliant with FlexRay Electrical Physical Layer Specification

V2.1 Rev. B

The AS8221 is a high speed automotive bus driver fully conforming

to the FlexRay Electrical Physical Layer Specification V2.1 Rev B.

The AS8221 operates as a bi-directional interface between the

FlexRay Communication Controller and the twisted-pair copper

wiring.

ꢀ

Data transfer up to 10 Mbps

Excellent EMC performance. High common mode range ensure

excellent EMI

ꢀ

Interface for Bus Guardian or supervision circuits

Automatic thermal shutdown protection

The AS8221 provides an optimized host controller interface

consisting of three low-active pins. The Enable (EN) and Standby

(STBN) input pins for mode handling by the microcontroller and the

Error (ERRN) out pin where system, chip failures or status

information are signalled to the microcontroller. Signalling logic high

on the Enable and Standby pin the device will enter NORMAL mode

in case no fault condition is given and in this mode the device is fully

operational meaning FlexRay communication is possible.

Additionally a RECEIVE-0NLY mode is implemented, which can be

accessed by the microcontroller where only FlexRay streams can be

received in order to avoid unwanted disturbances on the FlexRay

bus while listening to the bus traffic. In the low-power modes

(STANDBY and SLEEP mode) very low power consumption is

achieved.

Supports 12V and 24V systems with very low sleep current

Integrated power management system

- Two inhibit pins for external voltage supply control

- Local wake-up input

- Remote wake-up capability via FlexRay bus in low-power

modes

ꢀ

Supports 2.5, 3, 3.3, 5 V microcontrollers, automatic adaptation

to digital interface levels

Protection against damage due to short circuit conditions on the

bus (positive and negative battery voltage)

In case of undervoltage at one of the supply voltages (VBAT, VCC,

and VIO) the device will change its mode to a low-power mode

(either STANDBY or SLEEP mode) and the device will signal an

error accordingly. In case of low voltage is detected on both VBAT

and VCC the device will enter the POWER-OFF mode, where no

operation is possible. A safe mechanism from the low-power modes

to POWER-OFF mode and vice versa is implemented ensuring that

no deadlock can happen during the startup phase.

ꢀ

Operating temperature range -40ºC to +125ºC

Lead-free SSOP20 package

3 Applications

The AS8221 FlexRay Standard Transceiver is best fitting for

automotive FlexRay nodes where bus wake-up and voltage regulator

control for voltage supplies is needed.

Ensuring application in safety critical environments a two wire bus-

guardian interface is implemented where additional monitoring

circuitries on the electronic-control-unit can activate and deactivate

the transmitter and additionally on the receive enable output (RxEN)

in low-power modes the wake conditions and in normal power

modes the received FlexRay streams can be monitored.

The device addresses all ECUs connected to the permanent battery

supply (clamp 30). The AS8221 can be used as only ECU wake-up

component with very low power consumption in SLEEP mode.

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 (BM) and bus-plus (BP) line allows an ideal

balance of communications over different network topologies, with

excellent EMC performance.

www.austriamicrosystems.com/flexray/AS8221

Revision 1.1

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与AS8221-ASST相关器件

型号	品牌	获取价格	描述	数据表
AS8221-ASSU	AMSCO	获取价格	FlexRay Standard Transceiver
AS8222	AMSCO	获取价格	Enhanced FlexRay Standard Transceiver
AS8222-HSSM	AMSCO	获取价格	Enhanced FlexRay Standard Transceiver
AS8222-HSSP	AMSCO	获取价格	Enhanced FlexRay Standard Transceiver
AS8223	AMSCO	获取价格	Data transfer up to 10 Mbps
AS8228	AMSCO	获取价格	Highly Integrated Single Phase 2-Current Energy Metering Integrated Circuits with Microcon
AS8228BLQS	AMSCO	获取价格	Highly Integrated Single Phase 2 Current Energy Metering Integrated Circuits
AS8228BLQW	AMSCO	获取价格	Highly Integrated Single Phase 2 Current Energy Metering Integrated Circuits
AS82527	INTEL	获取价格	SERIAL COMMUNICATIONS CONTROLLER CONTROLLER AREA NETWORK PROTOCOL
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