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L9788 Datasheet(PDF) 245 Page - STMicroelectronics

Part # L9788
Description  Multifunction IC for automotive engine management system
PDF  264 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9788 Datasheet(HTML) 245 Page - STMicroelectronics

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 245 / 264 page
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DS12308 Rev 4
245/264
L9788
Device behavior
263
Figure 94. Power up permanent battery without boost and cranking
Figure 95. Power up permanent battery with boost and cranking
GADG1512161005PS
t
t
ON
SCENARIO 5A - CRANKING UNTIL POWER ON RESET
SCENARIO 5B - CRANKING UNTIL POWER ON RESET
RSTN
VTRK
VDD5
VPRE
Power On Reset
VB_IN
MRD out
PHOLD
WAKE_UP_CAN_DET
WAKE_UP_EOT_DET
WK_IN_DET
KEY_IN
RSTN
VTRK
VDD5
VPRE
Power On Reset
VB_IN
MRD out
PHOLD
WAKE_UP_CAN_DET
WAKE_UP_EOT_DET
WK_IN_DET
KEY_IN
KEY level under key_off threshold
without boost
KEY level under key_on threshold
without boost
regulator enable
Tuv_filter_vpre
Tuv_filter_vdd5
Td_uv_rst
Voff_vb_in
VBsense
regulator disable
Voff_vb_in
V
IL1
V
IH
VB_IN_TH
OFF
Vuv_vb_in
regulator enable
Voff_vb_in
VBsense
Tuv_filter_vpre
Tuv_filter_vdd5
Td_uv_rst
regulator disable
Voff_vb_in
VB_IN_TH
Vuv_vb_in
t
t
SCENARIO 4 - CRANKING
SCENARIO 6 - CRANKING
RSTN
VTRK
VDD5
VPRE
Power On Reset
VB_IN
MRD out
PHOLD
WAKE_UP_CAN_DET
WAKE_UP_EOT_DET
WK_IN_DET
KEY_IN
e
RSTN
VTRK
VDD5
VPRE
Power On Reset
VB_IN
MRD out
PHOLD
WAKE_UP_CAN_DET
WAKE_UP_EOT_DET
WK_IN_DET
KEY_IN
VBsense
Voff_vb_in
Vuv_vb_in
VB_IN_TH
with boost
without boost
Voff_vb_in
Vuv_vb_in
VB_IN_TH
VBsens
Vuv_vb_in
regulator disable
regulator enable
Vuv_vpre
Vuv_vdd5
Tuv_filter_vpre
Tuv_filter_vdd5
Td_uv_rst
Tuv_filter_vdd5
GADG1512161121PS



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