Datasheet > U6268B

U6268B

更新时间： 2024-11-05 03:24:55

品牌	Logo	应用领域
爱特美尔 - ATMEL		传感器
页数	文件大小	规格书
14页	298K
描述
Side-airbag Sensor Dual Interface

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中文翻译

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数据手册

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U6268B 数据手册

Features

•

Two Identical Interface Channels

Pre-regulated Smoothed Voltage and a Supply Current up to 50 mA for the Sensors

Data from the Sensors by Current Modulation with a Transmission Rate of 60 kBaud

(Transmission Bandwidth 500 kHz)

•

TTL-compatible Input Activates the Sensor

Data Output Can be Directly Connected to a Microcontroller Input

Operation Supply Voltage Range 5.7V ≤ V_S≤ 40V

Side-airbag

Sensor Dual

Interface

ESD Protection According to MIL-STD-883C Test Method 3015.7

High-level EMI Protection

Benefits

•

Simple Wiring Thanks to One Common Line for Supply of the Sensor and Data

Transmission from the Sensor to the U6268B

U6268B

•

Current Modulation Provides High Noise Immunity for Data Transfer

1. Description

The U6268B is an interface IC for remote automotive sensors. It links the crash sen-

sors in the driver and passenger door with the main airbag unit in the dashboard. Two

identical channels supply the external sensors and receive digital information from

them via one active wire each. The interface supplies the external sensors with a pre-

regulated smoothed voltage, the external units transmit the digital information back to

the interface by current modulation.

As the device is designed for safety-critical applications, the highest data transmission

security is mandatory. With high immunity against cross coupling between the two

channels, the U6268B is tailored for the harsh automotive environment.

Figure 1-1. Block Diagram

Channel 1

power

supply

Data

Voltage

comparator

I/V converter

Crash

Channel 1

sensor

Smoothed voltage

regulator

Data

trans-

mission

Enable

Channel 1

Channel 2

Temperature

monitor

Short circuit

detection

Channel 2

power

supply

Enable

Smoothed voltage

regulator

Crash

sensor

Channel 2

Data

Voltage

comparator

Data

trans-

mission

I/V converter

Rev. 4808B–AUTO–09/05

12 3 4 5 6 7...14

中文翻译

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