TLE8250G Infineon Technologies, TLE8250G Datasheet - Page 10

• Manufacturer Part Number: TLE8250G
• Description: IC TXRX CAN HS DSO-8
• Manufacturer: Infineon Technologies

Specifications of TLE8250G

• Packages: PG-DSO-8
• Transmission Ratemax: 1.0 Mbit/s
• Quiescent Current (max.): < 15 µA @ 5V standby
• Bus Wake-up Capability: No
• Additional Features: NRM, NEN
• Wake-up Inputs: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5
5.1
The CANH and CANL bus outputs are short-circuit-proof, either against GND or a positive supply voltage. A
current limiting circuit protects the transceiver against damages. If the device is heating up due to a continuos short
on CANH or CANL, the internal over-temperature protection switches off the bus transmitter.
5.2
All logic input pins have internal pull-up resistor to
open or floating, the TLE8250G enters into the Stand-By mode per default. In Stand-By mode the output driver
stage of the TLE8250G is disabled, the bus biasing is shut off and the HS CAN transceiver TLE8250G will not
influence the data on the CAN bus.
5.3
The TxD Time-out feature protects the CAN bus against permanent blocking in case the logical signal on the TxD
pin is continuously “Low”. A continuous “Low” signal on the TxD pin can have it’s root cause in a locked-up
microcontroller or in a short on the printed circuit board for example. In Normal Operation mode, a logical “Low”
signal on the TxD pin for the time t > t
the output driver stage (see
RxD output pin.
Figure 5
Figure 5
TxD input pin activates the TxD time-out function and deactivates the output driver stage. To release the output
driver stage after a TxD time-out event the TLE8250G requires a signal change on the TxD input pin from logical
“Low” to logical “High”.
5.4
The HS CAN Transceiver TLE8250G is equipped with an under-voltage detection on the power supply
case of an under-voltage event on
the Stand-By mode, regardless of the logical signal on the pins NEN and NRM (see
TLE8250G recovers from the under-voltage event, the operation mode returns to the programmed mode by the
logical pins NEN and NRM.
Data Sheet
shows how the output driver stage is deactivated and activated again. A permanent “Low” signal on the
Fail Safe Functions
Short circuit protection
Open Logic Pins
TxD Time-Out function
TxD Time-Out function
Under-Voltage detection
Figure
V
5). The receive unit is still active and the data on the bus are monitored at the
CC
TXD
, the under-voltage detection changes the operation mode of TLE8250G to
the TLE8250G activates the TxD Time-out and the TLE8250G disables
V
CC
. In case the
10
V
CC
supply is activated and the logical pins are
Figure
Rev. 1.0, 2010-06-02
Fail Safe Functions
6). If the transceiver
TLE8250G
V
CC
. In