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L9678P Datasheet(PDF) 27 Page - STMicroelectronics

Part # L9678P
Description  Automotive user configurable airbag and battery cut-off IC
PDF  215 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P Datasheet(HTML) 27 Page - STMicroelectronics

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DS11626 Rev 9
27/216
L9678P, L9678P-S
Start-up power control
214
Figure 7. Normal power down sequence - WAKEUP and SPI controlled
WAKEUP
POR
WU_off
VDD5
VDD3V3
VDD3V3 UV
RESET
VER
VBAT
(VBATMON)
VBBAD
VBGOOD
WU_on
SPI_SLEEP
command
SPI
SPI_OFF
command
This period of time can be hold for long
time, because battery is good. The system
waits until a dedicated frame to switch off.
ER Switch enable
COVRACT
VINT, CVDD
VINT/CVDD UV
GAPGPS02865



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