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TLE9250VLE 데이터시트(PDF) 13 Page - Infineon Technologies AG

부품명 TLE9250VLE
상세설명  High Speed CAN Transceiver
PDF  28 Pages
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제조업체  INFINEON [Infineon Technologies AG]
홈페이지  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TLE9250VLE 데이터시트(HTML) 13 Page - Infineon Technologies AG

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Data Sheet
13
Rev. 1.0
2017-08-09
HS CAN Transceiver
High Speed CAN Transceiver
Changing the mode of operation
6.3
Mode changes by VCC undervoltage
When the transmitter supply VCC (VCC < VCC(U/F)) is in undervoltage condition, the TLE9250V might not be able to
provide the correct bus levels on the CANH and CANL output pins. To avoid any interference with the network
the TLE9250V blocks the transmitter and changes the mode of operation when an undervoltage event is
detected (see Figure 8 and Figure 9).
In Normal-operating mode a undervoltage event on transmitter supply VCC (VCC < VCC(U/F)) triggers a mode
change to Forced-receive-only mode.
In Forced-receive-only mode the undervoltage detection VCC (VCC < VCC(U/F))is enabled. In Power-save mode the
undervoltage detection is disabled. In these modes the TLE9250V can operate without the transmitter supply
VCC.
Figure 8
Mode changes by undervoltage events on VCC
Figure 9
Undervoltage on the transmitter supply VCC
NEN
VCC
VIO
Power-down
state
“X”
“X”
“off”
Normal-operating
mode
NEN
VCC
VIO
0
“on”
“on”
Forced-
receive-only
mode
NEN
VCC
VIO
0
“off”
“on”
Power-save
mode
NEN
VCC
VIO
1
“X”
“on”
VIO “on”
VCC “off”
NEN “0”
VIO “on”
VCC “on”
NEN “0”
Forced-receive-only mode
any mode of operation
VCC
hysteresis
VIO(UV,H)
t
Power-save mode
t
NEN
“X” = don’t care
“high” due the internal
pull-up resistor1)
1) assuming no external signal applied
VCC undervoltage monitor
VCC(UV,F)
VCC undervoltage monitor
VCC(UV,R)
tDelay(UV)
tDelay(UV)
digital supply voltage VIO = “on”



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