TLE9251VLE datasheet(9/30 Pages) INFINEON

9 / 30 page

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 TLE9251V 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 low-power receiver is turned off.

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

• The bus biasing is connected to VCC/2.

• The STB 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 Stand-by mode and Forced-receive-only mode, when the STB 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 TLE9251V, which will be entered when the transmitter

supply VCC is not available and the STB pin is logical “low”. 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 low-power receiver is turned off.

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

• The bus biasing is connected to GND.

• The STB input pin is active and changes the mode of operation to Stand-by 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 STB 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.

TLE9251VLE Datasheet(PDF) 9 Page - Infineon Technologies AG

TLE9251VLE Datasheet(HTML) 9 Page - Infineon Technologies AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Datasheet Download

Link URL