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BD4154FV Datasheet(PDF) 8 Page - Rohm

Part No. BD4154FV
Description  Power Switch IC for ExpressCard
Download  16 Pages
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Maker  ROHM [Rohm]
Homepage  http://www.rohm.com
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BD4154FV Datasheet(HTML) 8 Page - Rohm

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 8 / 16 page
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BD4154FV
Technical Note
8/15
www.rohm.com
2010.04 - Rev.B
© 2010 ROHM Co., Ltd. All rights reserved.
Timing Chart
Power ON/OFF Status of ExpressCard
TM
System Status
ExpressCard
TM Module Status
Power Switch Status
Primary
Auxiliary
Primary(+3.3V and +1.5V)
Auxiliary(3.3V Aux)
OFF
OFF
Don’t care
OFF
OFF
ON
ON
De-asserted
OFF
OFF
Asserted
ON
ON
ON
ON
De-asserted
OFF
OFF
Asserted Before This
OFF
ON
Asserted After This
OFF
OFF
ExpressCard
TM States Transition Diagram
System Status
Card Status
Stand-by Status
:SYSR=L
Card Asserted Status
:CP#=L
ON Status
:SYSR=H
Card De-asserted Status
:CP#=H
From ON to Stand-by Status
:SYSR=H→L
From De-asserted to Asserted Status
:CP#=H→L
From Stand-by to ON Status
:SYSR=L→H
From Asserted to De-asserted Status
:CP#=L→H
V3AUX=OFF
V15=V3=OFF
CP#=H⇔L
SYSR=L→H
CP#=L→H
SYSR=H→L
SYSR=H⇔L
CP#=H
SYSR=L
CP#=L
SYSR=L
CP#=H
SYSR=H
CP#=L
SYSR=H
CP#=L
SYSR=L→H
CP#=H→L
SYSR=H
CP#=L
SYSR=H→L
CP#=L
SYSR=L
CP#=L→H
V3AUX=ON
V15=V3=ON
V3AUX=ON
V15=V3=OFF


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