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L9679P Datasheet(PDF) 202 Page - STMicroelectronics

Part # L9679P
Description  Automotive advanced airbag IC for mid/high end applications
PDF  272 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P Datasheet(HTML) 202 Page - STMicroelectronics

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Safing logic
L9679P
202/272
DocID029275 Rev 1
Figure 59. Safing engine diagnostic logic
A configurable mask for each internal ARMxINT signal is available for all of the integrated
deployment loops. The un-masked ARMxINT signal for each loop will enable the respective
loop drivers.
Activation of VSF (regulation rail for High Side Safing FET) occurs upon ARMxINT. Actual
High Side Safing FET activation still requires microcontroller signal.
L9679P is able to provide arming signals to external deployment loops by means of four
discrete output ARMx pins.



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