U6268B-MFPG3Y

U6268B-MFPG3Y Datasheet

• Simple Wiring Thanks to One Common Line for Supply of the Sensor and Data Transmission from the Sensor to the U6268B

Part	Datasheet
U6268B-MFPG3Y	U6268B-MFPG3Y (pdf)

Related Parts	Information
U6268B-MFPG3	U6268B-MFPG3

PDF Datasheet Preview
• 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 VS 40V • ESD Protection According to MIL-STD-883C Test Method • High-level EMI Protection • Simple Wiring Thanks to One Common Line for Supply of the Sensor and Data Transmission from the Sensor to the U6268B • Current Modulation Provides High Noise Immunity for Data Transfer Side-airbag Sensor Dual Interface U6268B The U6268B is an interface IC for remote automotive sensors. It links the crash sensors 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 preregulated 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 Block Diagram Microcontroller Data Channel 1 Enable Voltage comparator Channel 1 Channel 2 Enable Channel 2 Data Voltage comparator I/V converter Smoothed voltage regulator Temperature Short circuit monitor detection Smoothed voltage regulator I/V converter Channel 1 power supply Data transmission Crash sensor Channel 2 power supply Data transmission Crash sensor Pin Configuration Figure Pinning SO16 GND 1 RETURN1 2 OUT1 3 VS 4 OUT2 5 SC 6 RETURN2 7 GND 8 16 GND 15 ENABLE1 14 CLL1 13 OCM1 12 OCM2 11 CLL2 10 ENABLE2 9 GND Table Pin 1 2 3 4 5 6 7 8, 9 11 12 13 14 Pin Description Symbol Function Ordering Information Extended Type Number U6268B-MFPG3Y Package Information Package SO16 Dimensions in mm Package SO16 Remarks Taped and reeled, Pb-free U6268B technical drawings according to DIN specifications History 4808B-AUTO-09/05 • Put datasheet in a new template • Pb-free logo on page 1 added • Table “Ordering Information” on page 13 changed Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel 44 1355-803-000 Fax 44 1355-242-743 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel 49 71-31-67-0 Fax 49 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel 33 4-76-58-30-00 Fax 33 4-76-58-34-80 Literature Requests Disclaimer The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDITIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. Atmel Corporation All rights reserved. logo and combinations thereof, Everywhere You and others, are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Printed on recycled paper.

PDF Datasheet Preview

• 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 VS 40V
• ESD Protection According to MIL-STD-883C Test Method
• High-level EMI Protection
• Simple Wiring Thanks to One Common Line for Supply of the Sensor and Data Transmission from the Sensor to the U6268B
• Current Modulation Provides High Noise Immunity for Data Transfer

Side-airbag Sensor Dual Interface

U6268B

The U6268B is an interface IC for remote automotive sensors. It links the crash sensors 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 preregulated 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 Block Diagram

Microcontroller

Data Channel 1

Enable

Voltage comparator

Channel 1 Channel 2

Enable

Channel 2 Data

Voltage comparator

I/V converter

Smoothed voltage regulator

Temperature Short circuit
monitor
detection

Smoothed voltage regulator

I/V converter

Channel 1 power supply

Data transmission

Crash sensor

Channel 2 power supply

Data transmission

Crash sensor

Pin Configuration

Figure Pinning SO16

GND 1 RETURN1 2

OUT1 3 VS 4

OUT2 5 SC 6

RETURN2 7 GND 8
16 GND 15 ENABLE1 14 CLL1 13 OCM1 12 OCM2 11 CLL2 10 ENABLE2 9 GND

Table Pin 1 2 3 4 5 6 7 8, 9
11 12 13 14

Pin Description

Symbol Function
Ordering Information

Extended Type Number U6268B-MFPG3Y

Package Information

Package SO16

Dimensions in mm

Package SO16

Remarks Taped and reeled, Pb-free

U6268B
technical drawings according to DIN specifications

History
4808B-AUTO-09/05
• Put datasheet in a new template
• Pb-free logo on page 1 added
• Table “Ordering Information” on page 13 changed

Atmel Corporation
2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600

Regional Headquarters

Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500

Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369

Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581

Atmel Operations

Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314

Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314

La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60

ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01
1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759

Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel 44 1355-803-000 Fax 44 1355-242-743

RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel 49 71-31-67-0 Fax 49 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel 1 719 576-3300 Fax 1 719 540-1759

Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom

Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel 33 4-76-58-30-00 Fax 33 4-76-58-34-80

Literature Requests

Disclaimer The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDITIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life.

Atmel Corporation All rights reserved. logo and combinations thereof, Everywhere You and others, are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others.

Printed on recycled paper.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived U6268B-MFPG3Y Datasheet file may be downloaded here without warranties.

Datasheet ID: U6268B-MFPG3Y 519511