TLE7250_15 Datasheet, PDF (13/34 Pages) Infineon Technologies AG – High Speed CAN-Transceiver

TLE7250LE
TLE7250SJ
Functional Description
4.3.3
Undervoltage on the Transmitter Supply V_CC
In case the transmitter supply V_CC falls below the threshold V_CC < V_CC(UV,F), the transceiver TLE7250 can not
provide the correct bus levels to the CANH and CANL anymore. The normal-mode receiver is powered by the
transmitter supply V_CC. In case of insufficient V_CC supply the TLE7250 can neither transmit the CANH and CANL
signals correctly to bus nor can it receive them properly. Therefore the TLE7250 powers down and blocks both,
the transmitter and the receiver.
The transceiver TLE7250 powers up again, when the transmitter supply V_CC recovers from the undervoltage
condition.
VCC
VCC undervoltage monitor
VCC(UV,F)
hysteresis
VCC(UV,H)
VCC undervoltage monitor
VCC(UV,R)
tDelay(UV) delay time undervoltage
any mode of operation
power-down state
NEN
“X” = don’t care
NRM
“X” = don’t care
1) _{assuming no external signal applied}
Figure 6 Undervoltage on the transmitter supply V_CC
t
power-save mode
“high” due the internal
pull-up resistor¹⁾
t
“high” due the internal
pull-up resistor¹⁾
t
Data Sheet
13
Rev. 1.0, 2015-08-12