U6809B-MFL

U6809B-MFL Datasheet

The U6809B is designed to support the fail-safe function of safety-critical systems such as ABS. It includes a relay driver, two independent short-circuit-protected lamp drivers which are supplied by redundant ground lines, two monitoring circuits for the lamp driver output voltage and output current, a watchdog controlled by an external RC network and a reset circuit initiated by an over- and undervoltage condition of the 5-V supply providing a positive and a negative reset signal.

Part	Datasheet
U6809B-MFL	U6809B-MFL (pdf)

Related Parts	Information
U6809B-MFLG3	U6809B-MFLG3

PDF Datasheet Preview
• Digital Self-supervising Watchdog with Hysteresis • Three 250-mA Output Drivers • One Relay Driver, Two Lamp Drivers • Lamp Drivers with Auxiliary Ground • Lamp Drivers Short-circuit Protected • Lamp Drivers with Status Feedback • Enable Output • Over-/Undervoltage Detection and Reset • All Power Outputs Protected Against Standard Transients • All Power Outputs Protected Against 40-V Load Dump • Automatically Activated Lamp Drivers if VS is Disconnected • Automatically Activated Lamp Drivers Via AUX GND if Standard Ground is Disconnected The U6809B is designed to support the fail-safe function of safety-critical systems such as ABS. It includes a relay driver, two independent short-circuit-protected lamp drivers which are supplied by redundant ground lines, two monitoring circuits for the lamp driver output voltage and output current, a watchdog controlled by an external RC network and a reset circuit initiated by an over- and undervoltage condition of the 5-V supply providing a positive and a negative reset signal. Fail-safe IC with Relay Driver and Lamp Driver U6809B Figure Block Diagram LA1I LA2I RELI WDI Microcontroller FBLA1 FBLA2 PRES NRES Digital input lamp 1 Digital input lamp 2 Digital input relay Digital input wd Feedback lamp 1 Feedback lamp 2 p reset n reset Logic Short-circuit detection and temperature monitor Watchdog Debouncing of over- and undervoltage detection Oscillator monitoring RC-oscillator Open-collector 250 mA lamp driver 1 Temperature Open-collector 250 mA lamp driver 2 Open-collector 250 mA relay driver Open-collector 25 mA enable driver LA1O LA2O Loads RELO AUX GND Pin Configuration Figure Pinning SO20 REL1 LA1I LA2I RELO 4 FBLA1 7 NRES 8 Ordering Information Extended Type Number U6809B Package SO20 special lead frame Remarks Package Information Package SO20 Dimensions in mm technical drawings according to DIN specifications 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 Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Atmel Corporation All rights reserved. and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be the trademarks of others. Printed on recycled paper.

PDF Datasheet Preview

• Digital Self-supervising Watchdog with Hysteresis
• Three 250-mA Output Drivers
• One Relay Driver, Two Lamp Drivers
• Lamp Drivers with Auxiliary Ground
• Lamp Drivers Short-circuit Protected
• Lamp Drivers with Status Feedback
• Enable Output
• Over-/Undervoltage Detection and Reset
• All Power Outputs Protected Against Standard Transients
• All Power Outputs Protected Against 40-V Load Dump
• Automatically Activated Lamp Drivers if VS is Disconnected
• Automatically Activated Lamp Drivers Via AUX GND if Standard

Ground is Disconnected

The U6809B is designed to support the fail-safe function of safety-critical systems such as ABS. It includes a relay driver, two independent short-circuit-protected lamp drivers which are supplied by redundant ground lines, two monitoring circuits for the lamp driver output voltage and output current, a watchdog controlled by an external RC network and a reset circuit initiated by an over- and undervoltage condition of the 5-V supply providing a positive and a negative reset signal.

Fail-safe IC with Relay Driver and Lamp Driver

U6809B

Figure Block Diagram

LA1I LA2I RELI WDI

Microcontroller FBLA1

FBLA2

PRES NRES

Digital input lamp 1 Digital input lamp 2 Digital input relay Digital input wd

Feedback lamp 1 Feedback lamp 2
p reset n reset

Logic

Short-circuit detection and temperature
monitor

Watchdog

Debouncing of over- and undervoltage detection

Oscillator monitoring RC-oscillator

Open-collector 250 mA
lamp driver 1

Temperature

Open-collector 250 mA
lamp driver 2

Open-collector 250 mA
relay driver

Open-collector 25 mA
enable driver

LA1O

LA2O

Loads

RELO

AUX GND

Pin Configuration

Figure Pinning SO20

REL1

LA1I

LA2I

RELO 4

FBLA1 7

NRES 8
Ordering Information

Extended Type Number U6809B

Package SO20 special lead frame

Remarks

Package Information

Package SO20

Dimensions in mm
technical drawings according to DIN specifications

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 Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems.

Atmel Corporation All rights reserved. and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be the 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 U6809B-MFL Datasheet file may be downloaded here without warranties.

Datasheet ID: U6809B-MFL 519521