TLE6251-3G Infineon Technologies, TLE6251-3G Datasheet - Page 17

• Manufacturer Part Number: TLE6251-3G
• Manufacturer: Infineon Technologies

Specifications of TLE6251-3G

• Packages: PG-DSO-14
• Transmission Ratemax: 1.0 Mbit/s
• Quiescent Current (max.): < 30 µA @ 5V standby
• Bus Wake-up Capability: Yes
• Additional Features: NSTB, WK, EN, NERR, INH, Vio, no SPLIT PIN
• Wake-up Inputs: Bus wake-up + wake-up pin

7
7.1
The High Speed CAN Transceiver TLE6251-3G is equipped with a bus failure detection unit. In Normal Operation
mode the TLE6251-3G can detect the following bus failures:
•
•
•
•
•
•
The TLE6251-3G can not detect the bus failures:
•
•
•
The TLE6251-3G detects the bus failures while sending a “Dominant” signal to the CAN bus. After sending four
“Dominant” bits to the CAN bus, a logical “Low” on the NERR pins indicates the CAN bus failure. For the failure
indication the “Dominant” bits require a minimum pulse width of 4 μs. In case the TLE6251-3G detects an CAN bus
failure, the failure is only indicated by the NERR pin, the transceiver doesn’t stop or block the communication, by
disabling the output stage for example.
Figure 9
1) The communication on the CAN bus could still be possible even with a short CANH to
Data Sheet
CANH
CANL
NERR
CANH shorted to GND
CANL shorted to GND
CANH shorted to
CANL shorted to
CANH shorted to
CANL shorted to
CANH open
CANL open
CANH short to CANL
communication is possible or not, depends on parameters like the number of participants inside the CAN network, the
network termination, etc. This figure shows a working CAN bus communication as an example and it shall not be
considered as a liability that on HS CAN networks the CAN bus communication continues in every CAN bus failure case.
RxD
TxD
Fail Safe Features
CAN Bus Failure Detection
CAN Bus Failure CANH short to
V
V
V
V
CC
S
CC
S
Short to V
CC
V
Four Dominant Bits
CC
1)
17
V
CC
or CANH to
Rev. 1.1, 2011-06-06
Fail Safe Features
V
TLE6251-3G
S
. If the CAN bus
t
t
t
t