TLE6254-2G Datasheet, PDF (9/24 Pages) Infineon Technologies AG – Fault Tolerant Differential CAN-Transceiver

Final Data TLE 6254-2G
Circuit Description
When one of the bus failures 3, 5, 6, 6a and 7 is detected, the defective bus wire is
disabled by switching off the affected bus termination and the respective output stage. A
wake-up from sleep mode via the bus is possible either via a dominant CANH or CANL
line. This ensures that a wake-up is possible even if one of the failures 1 to 7 occurs.
Table 3
failure #
1
2
3
3a
4
5
6
6a
7
CAN bus-line failures (according to ISO 11519-2)
failure description
CANL line interrupted
CANH line interrupted
CANL line shorted to V_BAT
CANL line shorted to V_CC
CANH line shorted to GND:
CANL line shorted to GND:
CANH line shorted to V_BAT
CANH line shorted to V_CC
CANL line shorted to CANH line
A current limiting circuit protects the CAN transceiver output stages from damage by
short-circuit to positive and negative battery voltages.
The CANH and CANL pins are protected against electrical transients which may occur
in the severe conditions of automotive environments.
The transmitter output stages generate the majority of the power dissipation. Therefore
they are disabled if the junction temperature exceeds the maximum value. This
effectively reduces power dissipation, and hence will lead to a lower chip temperature,
while other parts of the IC can remain operating. In temperature shut-down condition the
TLE 6254-2G is still able to receive CAN-bus messages.
Data Sheet Version 1.4
9
2003-07-22