TLE9250VLE datasheet(9/28 Pages) INFINEON

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Data Sheet

Rev. 1.0

2017-08-09

HS CAN Transceiver

High Speed CAN Transceiver

Modes of operation

5.1

Normal-operating mode

In Normal-operating mode the transceiver TLE9250V sends and receives data from the HS CAN bus. All

functions are active (see also Figure 4 and Table 2):

• The transmitter is active and drives the serial data stream on the TxD input pin to the bus pins CANH and

CANL.

• The normal-mode receiver is active and converts the signals from the bus to a serial data stream on the RxD

output.

• The RxD output pin indicates the data received by the normal-mode receiver.

• The bus biasing is connected to VCC/2.

• The NEN input pin is active and changes the mode of operation.

• The TxD time-out function is enabled and disconnects the transmitter in case a time-out is detected.

• The overtemperature protection is enabled and disconnects the transmitter in case an overtemperature is

detected.

• The undervoltage detection on VCC is enabled and triggers a mode change to Forced-receive-only in case

an undervoltage event is detected.

• The undervoltage detection on VIO is enabled and powers down the device in case of detection.

Normal-operating mode is entered from Power-save mode and Forced-receive-only mode, when the NEN

input pin is set to logical “low”.

Normal-operating mode can only be entered when all supplies are available:

• The transmitter supply VCC is available (VCC > VCC(UV,R)).

• The digital supply VIO is available (VIO > VIO(UV,R)).

5.2

Forced-receive-only mode

The Forced-receive-only mode is a fail-safe mode of the TLE9250V, which will be entered when the transmitter

supply VCC is not available . The following functions are available (see also Figure 4 and Table 2):

• The transmitter is disabled and the data available on the TxD input is blocked.

•The normal-mode receiver is enabled.

• The RxD output pin indicates the data received by the normal-mode receiver.

• The bus biasing is connected to GND.

• The NEN input pin is active and changes the mode of operation to Power-save mode, if logical “high”.

• The TxD time-out function is disabled.

• The overtemperature protection is disabled.

• The undervoltage detection on VCC is active.

• The undervoltage detection on VIO is enabled and powers down the device in case of detection.

• Forced-receive-only mode is entered from power-down state if the NEN input pin is set to logical “low” and

the digital supply VIO is available (VIO > VIO(UV,R)).

• Forced-receive-only mode is entered from Normal-operating mode by an undervoltage event on the

transmitter supply VCC.

5.3

Power-save mode

In Power-save mode the transmitter and receiver are disabled. (see also and Table 2):

• The transmitter is disabled and the data available on the TxD input is blocked.

• The receiver is disabled and the data available on the bus is blocked.

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