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PDF TLE6263-3G Data sheet ( Hoja de datos )
| Número de pieza | TLE6263-3G | |
| Descripción | System Basis Chip | |
| Fabricantes | Infineon Technologies | |
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Data Sheet, Revision 3.2, 2008-11-26
System Basis Chip
TLE 6263-3G
Integrated LS-CAN, LDO and
HS-Switch
Automotive and
Industrial
Never stop thinking.
1 page  
Data Sheet TLE 6263-3G
4 Pin Definitions and Functions (cont’d)
Pin No. Symbol Function
16 SI
Sense comparator input; for monitoring of external voltages, to
program the detection level connect external voltage divider
17
FSO
Fail safe output; to supervise and control critical applications,
high when watchdog is correctly served, LOW at any reset
condition, open drain output, internal pull up, active LOW
18 VCI Internal voltage supply; for stabilization of internal power
supply, block to GND with an external capacitor CVI ≥ 100 nF
19 VCC Voltage regulator output; for 5V supply, to stabilize block to
GND with an external capacitor CQ ≥ 100 nF
24 CANL CAN-L bus line; LOW in dominant state
25 RTL CANL-Termination output; connect to CANL bus line via
termination resistor
26 CANH CAN-H bus line; HIGH in dominant state
27
RTH
CANH-Termination input; connect to CANH bus line via
termination resistor
28 INT Interrupt output; to monitor wake-up events or valid sense input
condition; integrated pull up resistor; active LOW
Revision 3.2
5
2008-11-26
5 Page 
Data Sheet TLE 6263-3G
Electromagnetic Emmision (EME)
To reduce radiated electromagnetic emission (EME), the dynamic slopes of the CANL
and CANH signals are both limited and symmetric. This allows the use of an unshielded
twisted or parallel pair of wires for the bus. During single-wire transmission (one of the
bus lines is affected by a bus line failure) the EME performance of the system is
degraded from the differential mode.
6.4 Bus Failure Management
There are 9 different CAN bus wiring failures defined by the ISO 11519-2/ISO 11898-3
standard. These failures are devided into 7 failure groups (see Table 2). The difference
between ISO11898-3 and ISO 11519-2 is also shown in Table 2. When a bus wiring
failure is detected the device automatically switches to a dedicated CANH or CANL
single-wire mode to maintain the communication if necessary. Therefore it is equipped
with one differential receiver and four single ended comparators (two for each bus line).
To avoid false triggering by external RF influences, the single wire modes are activated
after a certain delay time. As soon as the bus failure disappears the transceiver switches
back to differential mode after another time delay.
The differential receiver threshold is set to typ. -2.5V. This ensures correct reception in
the normal operation mode as well as in the failure cases 1, 2, 3a(6a) and 4(5) with a
noise margin as high as possible. When one of the bus failures 3(6), 5(4), 6(3), 6a(3a),
and 7 is detected, the defective bus wire is disabled by switching off the affected bus
termination and output stage. The failure cases in brackets() are the failure cases
according to ISO 11898-3. Simultaneously the multiplexing output of the receiver circuit
is switched to the unaffected single ended comparator
The bus failures are monitored via the diagnosis protocoll of the SPI. A general indication
of a CAN failure during normal mode at CANH or CANL is reported by OBIT 4 and 5. It
is also possible to distinguish 6 CAN bus failures or failure groups on the SPI output bits
3 to 7 in the RxOnly mode(see Table 2 and 5). The failures are reported until
transmission of the next CAN word begins.
In case the transmission data input TxD is permanently dominant, both, the CANH and
CANL transmitting stage are disabled after a certain delay time tTxD. This is necessary
to prevent the bus from being blocked by a defective protocol unit or short to GND at the
TxD input.
In order to protect the transceiver output stages from being damaged by shorts on the
bus lines, current limiting circuits are integrated. The CANL and CANH output stage
respectively are protected by an additional temperature sensor, that disables them as
soon as the junction temperature exceeds the maximum value. In the temperature shut-
down condition of the CAN output stages receiving messages from the bus lines is still
possible.
Revision 3.2
11
2008-11-26
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TLE6263-3G.PDF ] | |
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