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L9680 Fiches technique(PDF) 183 Page - STMicroelectronics

No de pièce L9680
Description  Automotive advanced airbag IC for mid/high end applications
PDF  277 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9680 Fiches technique(HTML) 183 Page - STMicroelectronics

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L9680
Remote sensor interface
276
Besides, in case of VDA selected, the ASIC is also able to recognize the current value
of the speed pulse by computing a second threshold (named Ith2): Ith2 = IB0 +
Ith1 +
Ith2/2 where Ith2 in the range from 10 mA to 18.6 mA (default is 14 mA)
Fixed current trip points where the thresholds are set via SPI. The default value for first
threshold is 9.8 mA and for second threshold is 19.6 mA
Figure 44. Wheel speed sensor protocols



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