The monolithic integrated bipolar circuit, U479B, is designed as a monitor for lamp failure in automobiles. The comparator threshold is matched to the PTC characteristic of incandescent lamps. The threshold is tied to V4,6 = VS VT where VT = 8 mV.
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U479B-MFPY (pdf) |
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U479B-MFPG3Y |
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U479B-M |
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U479B-MFPG3 |
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U479B-MFP |
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U479B-MY |
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Automotive Lamp-outage Monitor IC The monolithic integrated bipolar circuit, U479B, is designed as a monitor for lamp failure in automobiles. The comparator threshold is matched to the PTC characteristic of incandescent lamps. The threshold is tied to V4,6 = VS VT where VT = 8 mV. If the voltage drop across the shunt resistor, Rsh, exceeds 8 mV, the output is turned off, otherwise, the output is turned on. Without supply voltage or open input pin 8, the output is turned off. A comparator input, which is not used, must be connected to pin Figure Schematic and Application Circuit Rsh Z2 Rsh 8 VBatt 5 OUT1 3 OUT2 U479B Lamps 1 R1 150 Pin Configuration Figure Pinning DIP8/SO8 GND 1 VS 2 OUT2 3 1N1 4 Table Pin 1 2 3 4 5 6 7 8 Pin Description Symbol Function Reference point, ground Supply voltage OUT2 Output 2 Input 1 OUT1 Output 1 Input 2 VREF Reference voltage INPUT switch 8 INPUT 7 VREF 6 IN2 5 OUT1 2 U479B U479B Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Value Unit Supply voltage Current consumption, t = 2 ms Output current I3,5 Input voltage Reference point pin 7 -V4,6 Power dissipation Tamb = 95°C Ordering Information Extended Type Number U479B-MY U479B-MFPY U479B-MFPG3Y Package Information Package DIP8 SO8 Remarks Pb-free Tubed, Pb-free Taped and reeled, Pb-free Package D IP8 D im en sio ns in m m ax 9 8 technical draw ings according to D IN s p e c ific a tio n s U479B Package SO8 Dimensions in mm technical drawings according to DIN specifications History 4775B-AUTO-09/05 • Put datasheet in a new template • Pb-free logo on page 1 added • Ordering Information on page 5 changed 6 U479B 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. 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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. |
More datasheets: MSA-3111-TR1G | MSA-3111-TR1 | MSA-3111-BLKG | MSA-3186-BLKG | MSA-3111-TR2G | MSA-3186-TR1G | MSA-3186-TR2G | SEN0149 | U479B-MFPG3Y | U479B-M |
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