u6268b ATMEL Corporation, u6268b Datasheet
u6268b
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u6268b Summary of contents
Page 1
... 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 ...
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... Analog current output, representing 1/10 current of OUT1 14 CLL1 Current logic level output (low at high OUT1 current, monitoring via OCM1) Controls OUT2 voltage 15 ENABLE1 ENABLE2 High = OUT2 active, ENABLE1 Low or open = OUT2 switched off 16 GND Ground and reference pin U6268B 2 1 GND 2 RETURN1 3 OUT1 4 VS OUT2 ...
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... Temp = high CLLx 4808B–AUTO–09/05 Voltage Regulator out S rising S falling Latch Temp Reset Set Temp + - V CLL-x V ret_x - + U6268B V S Current mirror ratio I /I OCMx OUTx I OUT Over OUTx current limi- V tation OUT ON OFF I OUT-sink - - + + 4 OCM-det ...
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... The OUT pins are protected against overtemperature and short circuits. A reverse polarity diode at pin V between OUTx and V U6268B 4 , and changes very slowly with a varying battery voltage in order to suppress distur This voltage difference is reduced in to ensure sufficient supply voltage for the exter- ...
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... The CLL-current threshold, the OUT-current limitation and the OCM = 750 at OCMx, the correct OUTx-current threshold related OCMx 50 mA. If ENABLEx is low or open, RETURNx is a current sink with RETURNx = 5 V/ms, and at the falling edge of V OUTx = 10 V/ms. U6268B in a range of 500 OCM or open load). Batt , the maximum slew rate Batt 2 mA. , ...
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... OUTx, it has to be checked in each application that the chip temperature does not exceed T = 150°C in normal operation. jmax 3.10 Test Hint The overtemperature signal can be activated by connecting ENABLE1 or ENABLE2 to 9V/10 mA. U6268B also achieve a low ambient thermal resistance (R thJC ( OUT1 ...
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... K/W) can be achieved by using a big pad size for ground connection thJA “GND Pins” on page 6) Min. Max. –0.6 40 –0.3 6 –0.3 30 –0.3 6.8 –1 27 –1 40 240 3 0.1 –110 220 ±2000 ±200 –40 95 –40 150 –55 125 Value 36 U6268B Unit µ °C °C °C Unit K/W 7 ...
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... OCMx OUTx Dynamic resistance OUTx Dynamic resistance OUTx + RETURNx OUTx current limitation (OUTx short to GND) Overcurrent detection level Maximum OUTx current (OUTx short to GND) U6268B 8 25V for maximum 25 min Test Conditions Outputs disabled, V 18V S Outputs disabled, V 40V S One output enabled, V ...
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... I 0.1 OCM_sink V ret_sat R 2 ret I 60 ret_lim I 70 ret_lim I 0.8 ret_low V 1.4 ret_low V 1.1 ret_high V 0.2 ret_hys t 3 dRet_on t 30 dRet_off I 23.3 CLL_L I 19.1 CLL_H I 3.5 CLL_hys V CLL_sat I CLL_leak U6268B Max. Unit µs 100 µs 2.4 V 1.9 V 0.6 V 0.5 V 5.3 V 4.9 V 0.5 V 0. 150 mA 200 ...
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... Power dissipation 2 T 125°C j Selective Overtemperature Protection Logic AND connected with overcurrent detection (RETURNx, OUTx) Time delay until overtemperature shut-down U6268B 10 25V for maximum 25 min Test Conditions I to CLL rise OUT I to CLL fall OUT Maximum difference between rise and ...
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... Variation of Power Supply V S 14 10 OUTx 10.7 V 8.7 V Figure 7-2. Overcurrent Protection V ENABLEx 5 OUTx CLLx 5.0 V 4808B–AUTO–09/05 0.4 ms 0.2 ms overcurrent overcurrent overtemperature shut down 100 ms Pause/pulse for example 150 (Pulse/pause time depends on power disipation and R U6268B t overcurrent t ) thJA 11 ...
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... OUT from sensor 50 µs +V Batt 100 CLL1 Out1 Interface1 15 Enable1 13 OCM1 2 Return1 750 U6268B = Out2 11 CLL2 Interface2 10 Enable2 7 12 Return2 OCM2 GND SC 750 discharge OUT with internal current 150 µ ...
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... Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4808B-AUTO-09/05 4808B–AUTO–09/05 Package SO16 10.0 9.85 0.4 1.27 8. History Put datasheet in a new template Pb-free logo on page 1 added Table “Ordering Information” on page 13 changed Remarks Taped and reeled, Pb-free 5.2 4.8 3.7 1.4 0.2 0.25 3.8 0.10 6.15 5.85 technical drawings according to DIN specifications U6268B 13 ...
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... 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 2005. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...