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TLE7250V_15 Datasheet, PDF (11/34 Pages) Infineon Technologies AG – High Speed CAN-Transceiver | |||
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TLE7250VLE
TLE7250VSJ
Functional Description
4.3
Power-up and Undervoltage Condition
By detecting an undervoltage event, either on the transmitter supply VCC or the digital supply VIO, the transceiver
TLE7250V changes the mode of operation. Turning off the digital power supply VIO, the transceiver powers down
and remains in the power-down state. While switching off the transmitter supply VCC, the transceiver either
changes to the forced power-save mode, or remains in power-save mode (details see Figure 5).
VIO âonâ
VCC âonâ
NEN â0â
normal-operating
mode
NEN VCC VIO
0 âonâ âonâ
power-down
state
NEN VCC VIO
âXâ âXâ âoffâ
VIO âonâ
VCC âoffâ
NEN â0â
VIO âonâ
VCC âonâ
NEN â0â
VIO âonâ
VCC âXâ
NEN â1â
VIO âonâ
VCC âXâ
NEN â1â
power-save
mode
NEN VCC VIO
1 âXâ âonâ
VIO âonâ
VCC âoffâ
NEN â0â
VIO âonâ
VCC âonâ
NEN â0â
forced power-save
mode
NEN VCC VIO
0 âoffâ âonâ
VIO âonâ
VCC âXâ
NEN â1â
Figure 5 Power-up and undervoltage
Table 2 Modes of operation
Mode
NEN
VIO
VCC
Normal-operating âlowâ âonâ
âonâ
Power-save
âhighâ âonâ
âXâ
Forced power-save âlowâ âonâ âoffâ
Power-down state âXâ
âoffâ
âXâ
Bus Bias Transmitter
VCC/2
âonâ
floating âoffâ
floating âoffâ
floating
âoffâ
Normal-mode Low-power
Receiver
Receiver
âonâ
not available
âoffâ
not available
âoffâ
not available
âoffâ
not available
Data Sheet
11
Rev. 1.0, 2015-08-12
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